IPTV STB and QoS/QoE

48
IPTV STB and Qo S/QoE Speaker 林林林 Date 2010/11/5

description

IPTV STB and QoS/QoE. Speaker :林裕強 Date : 2010/11/5. OUTLINE. IPTV introduce IPTV STB introduce STB technique QoS/QoE Conclusion Reference. IPTV introduce. - PowerPoint PPT Presentation

Transcript of IPTV STB and QoS/QoE

Page 1: IPTV STB and QoS/QoE

IPTV STB and QoSQoE

Speaker 林裕強Date 2010115

2

OUTLINE

IPTV introduce

IPTV STB introduce

STB technique

QoSQoE

Conclusion

Reference

3

IPTV introduce

由於以 IP 為基礎的寬頻網路發展迅速網路承載能力不斷提高因此為了能夠提升 IP 網路業務促進 IP 網路普及與發展將數位電視的豐富媒體資源引入 IP 網路中而 IPTV 就是在 IP 網路與傳統電視業務融合產生的新的業務主要特點在於交互性和即時性

4

IPTV introduce

Fig IPTV 架構圖

5

IPTV introduce

Fig IPTV deployment topology and available delivery schemes

6

IPTV STB Overview

Set-Top Box (STB) 是在很廣泛的産品名詞在中文譯爲視訊轉換器機頂盒或機上盒其代表的功能則從過去的類比選台器電視上網機一路發展下來目前的 STB 已可以涵蓋家庭閘道器或個人視訊錄

放影機 (PVR) 的産品定位

7

IPTV STB Overview

IPTV 用戶端負責接收處理儲存播放轉發數據文件 EPGhellip 等 IPTV 終端有三種基本類型 PC 手機 STB+ 電視 STB 須具備包括數據轉換接入支持 (FTTH XD

SL HFChellip 等 ) 業務支持解碼支持協議支持DRM 內容緩存等功能

Entry-level digital set-top box Mid-range digital set-top box High-range digital set-top box

8

IPTV STB Overview

IP STB 的功能定位示意圖

9

IPTV STB technique requirement

業務能力要求 IPTV 機頂盒需要支持基本業務和擴展業務

功能 基本業務包括直播點播時移電視 擴展業務包括可視業務網路遊戲訊息

交換

10

IPTV STB technique requirement

功能要求 STB 設備在 IPTV 中需要實現承上啟下的作

用一方面接收業務系統的媒體串流另一方面要實現對用戶業務播放過程的控制STB 作為業務網路用戶接入設備須有一系列的管理功能 管理功能通訊協議業務功能在 STB 標準僅對媒體處理交互功能管理功能安全和環境做具體規範

11

IPTV STB technique requirement

(1) 媒體處理功能要求 需支持基本業務和擴展業務所需媒體處理 功能基本業

務可在 MPEG-2 MPEG-4 H264 SMPTE 音頻解碼採用 MPEG-24 AAC(Advanced Audio Coding) MP3 Dolby AC 351

擴展業務需支持 CIF(Common Intermediate Format ) QCIF(Quater Common Intermediate Format) H261 H263 音頻以 G711 為標準亦可採 G723 G728 G729 為標準

12

IPTV STB technique requirement

(2) 交互功能要求 STB 需提供內容交互選擇和內容交互控制

兩類交互功能內容交互選擇利用選單選擇內容進行節目檢索與認證系統交互認證訊息內容交互控制主要針對實現點播業務時機頂盒與業務平台間應具有交互控制命令以控制內容訊息功能

13

IPTV STB technique requirement

(3) 管理功能要求 a 軟體升級 透過本地網路或是連至外部網路下

載安裝最新套件以獲取新業務的能力 b 日記功能 針對本機版本訊息及系統訊息的管

理與錯誤訊息的診斷並產生兩份備份文件 c 遠端配置功能 重新啟動下載恢復設定等 d 本地配置功能 遙控器對 STB 訊息配置網入

連接帳號密碼等

14

IPTV STB technique requirement

外部接入要求 - 外部接口基本須包含三類 網路音視訊及紅外線遙

控接口根據需要還可擴展 - 網路接口 包括 10100Base-T xDSL 無線接口 - 音視訊接口 類比數位音訊視訊接口 -紅外線遙控接口 規定紅外線遙控器對機頂盒控制傳輸距離紅外線發射角度和接收最小角度具體性能要求應符合 IrDA11(Infrared Data Association) 協議

-輔助接口 USB

15

IPTV STB technique requirement

通信協議要求 IPTV STB 為網路接入的終端設備必須支援一

系列的業務與 IP 機頂盒標準將所涉及 IP歸納為

接入過程 PPPoE DHCP IEEE8021x

文件傳送 TFTP FTP HTTP

媒體傳送 RTP RTSP

媒體播放 IGMP

16

IPTV STB technique requirement

安全要求 - 安全認證要求 STB 需支持 AAA(Authentication

Authorization and Accounting ) 接入 IP 網路應提供必要的訊息經認證授權後才可使用 IPTV業務

- 數位版權 (DRM) 管理安全要求 供應商送到用戶終端的訊息應具有 DRM 的訊息在 STB 中須有針對業務平台的 DRM 版本提供內容版權的保護

17

IPTV STB 功能結構 因為 IPTV STB 提供三網融合的業務做到 triple

play 可以建立 IP化的家庭環境 目前可支援 IPTV 產品大致分為 Entry-level digita

l set-top box Mid-range digital set-top box High-range digital set-top box

STB 由軟硬體所構成硬體包含 CPU Storage Feedback Channel Conditional Access external device

軟體則有操作解譯與應用三大方面

18

IPTV STB硬體結構

Fig STB 系統架構圖

19

IPTV STB 軟體結構 (1)嵌入式WinCE 終端 優 支援Windows 套件 缺 原始碼不公開 WinCE佔用許多 ROM

RAM (2)嵌入式 Linux 終端 優 原始碼公開技術交流方便維護成本低 缺 解碼器性能需芯片支援 (3)other software Ex VxWorks

20

STB 設備分類與功能定位 Entry-level digital set-top box 接受數位廣播電視為主要功能並具有按次計費 (pay-per-view PPV) 的系統功能與基本的瀏覽工 具這類設備的特色包括低成本以及有限的記 憶容量輸出入介面及運算能力 Mid-range digital set-top 1048699 具有回傳的管道因此能提供與系統業者在頭端 (head-end) 的伺服器進行溝通此外不論在處 理效能或儲存能力上都比入門級數位 STB還強上 一倍以上

21

STB 設備分類與功能定位 High-range digital set-top box 功能更強幾可比擬多媒體桌上型電腦它的運算能力可

以是低階廣播電視 STB 的十倍以上例如在儲存能力上一般有 32-64Mbyte 的 Flash 記憶容量也有高速的回傳管道來提供多種進階服務此外它的繪圖功能也很強能讓收視戶收看高畫質電視訊號

在高階 STB 的市場上又有多種不同的功能定位例如有些高階設備更提供了個人錄影機 (Personal Video RecorderPVR) 的功能也就是在 STB 中置入硬碟讓 STB 有足夠的儲存容量錄製節目不僅如此新的 IP STB 設備還具有家庭網路的連接埠讓 STB 進一步成為家用閘道器 (Residential Gateway)

22

STB 與 IPTV 接口 STB 與 IPTV 平台接口包含網路層認證與

應用層認證按照目前用戶與網路間的通訊方式分為以下三種

(1) 認證接口 PPPoE 與 DHCP+WEB驗證 (2) 用戶消費接口 依照系統價格提示用戶確認購買系統實現扣費的一個消費流程

(3)服務使用接口 實現用戶從內容營運商獲得不同應用服務的過程

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 2: IPTV STB and QoS/QoE

2

OUTLINE

IPTV introduce

IPTV STB introduce

STB technique

QoSQoE

Conclusion

Reference

3

IPTV introduce

由於以 IP 為基礎的寬頻網路發展迅速網路承載能力不斷提高因此為了能夠提升 IP 網路業務促進 IP 網路普及與發展將數位電視的豐富媒體資源引入 IP 網路中而 IPTV 就是在 IP 網路與傳統電視業務融合產生的新的業務主要特點在於交互性和即時性

4

IPTV introduce

Fig IPTV 架構圖

5

IPTV introduce

Fig IPTV deployment topology and available delivery schemes

6

IPTV STB Overview

Set-Top Box (STB) 是在很廣泛的産品名詞在中文譯爲視訊轉換器機頂盒或機上盒其代表的功能則從過去的類比選台器電視上網機一路發展下來目前的 STB 已可以涵蓋家庭閘道器或個人視訊錄

放影機 (PVR) 的産品定位

7

IPTV STB Overview

IPTV 用戶端負責接收處理儲存播放轉發數據文件 EPGhellip 等 IPTV 終端有三種基本類型 PC 手機 STB+ 電視 STB 須具備包括數據轉換接入支持 (FTTH XD

SL HFChellip 等 ) 業務支持解碼支持協議支持DRM 內容緩存等功能

Entry-level digital set-top box Mid-range digital set-top box High-range digital set-top box

8

IPTV STB Overview

IP STB 的功能定位示意圖

9

IPTV STB technique requirement

業務能力要求 IPTV 機頂盒需要支持基本業務和擴展業務

功能 基本業務包括直播點播時移電視 擴展業務包括可視業務網路遊戲訊息

交換

10

IPTV STB technique requirement

功能要求 STB 設備在 IPTV 中需要實現承上啟下的作

用一方面接收業務系統的媒體串流另一方面要實現對用戶業務播放過程的控制STB 作為業務網路用戶接入設備須有一系列的管理功能 管理功能通訊協議業務功能在 STB 標準僅對媒體處理交互功能管理功能安全和環境做具體規範

11

IPTV STB technique requirement

(1) 媒體處理功能要求 需支持基本業務和擴展業務所需媒體處理 功能基本業

務可在 MPEG-2 MPEG-4 H264 SMPTE 音頻解碼採用 MPEG-24 AAC(Advanced Audio Coding) MP3 Dolby AC 351

擴展業務需支持 CIF(Common Intermediate Format ) QCIF(Quater Common Intermediate Format) H261 H263 音頻以 G711 為標準亦可採 G723 G728 G729 為標準

12

IPTV STB technique requirement

(2) 交互功能要求 STB 需提供內容交互選擇和內容交互控制

兩類交互功能內容交互選擇利用選單選擇內容進行節目檢索與認證系統交互認證訊息內容交互控制主要針對實現點播業務時機頂盒與業務平台間應具有交互控制命令以控制內容訊息功能

13

IPTV STB technique requirement

(3) 管理功能要求 a 軟體升級 透過本地網路或是連至外部網路下

載安裝最新套件以獲取新業務的能力 b 日記功能 針對本機版本訊息及系統訊息的管

理與錯誤訊息的診斷並產生兩份備份文件 c 遠端配置功能 重新啟動下載恢復設定等 d 本地配置功能 遙控器對 STB 訊息配置網入

連接帳號密碼等

14

IPTV STB technique requirement

外部接入要求 - 外部接口基本須包含三類 網路音視訊及紅外線遙

控接口根據需要還可擴展 - 網路接口 包括 10100Base-T xDSL 無線接口 - 音視訊接口 類比數位音訊視訊接口 -紅外線遙控接口 規定紅外線遙控器對機頂盒控制傳輸距離紅外線發射角度和接收最小角度具體性能要求應符合 IrDA11(Infrared Data Association) 協議

-輔助接口 USB

15

IPTV STB technique requirement

通信協議要求 IPTV STB 為網路接入的終端設備必須支援一

系列的業務與 IP 機頂盒標準將所涉及 IP歸納為

接入過程 PPPoE DHCP IEEE8021x

文件傳送 TFTP FTP HTTP

媒體傳送 RTP RTSP

媒體播放 IGMP

16

IPTV STB technique requirement

安全要求 - 安全認證要求 STB 需支持 AAA(Authentication

Authorization and Accounting ) 接入 IP 網路應提供必要的訊息經認證授權後才可使用 IPTV業務

- 數位版權 (DRM) 管理安全要求 供應商送到用戶終端的訊息應具有 DRM 的訊息在 STB 中須有針對業務平台的 DRM 版本提供內容版權的保護

17

IPTV STB 功能結構 因為 IPTV STB 提供三網融合的業務做到 triple

play 可以建立 IP化的家庭環境 目前可支援 IPTV 產品大致分為 Entry-level digita

l set-top box Mid-range digital set-top box High-range digital set-top box

STB 由軟硬體所構成硬體包含 CPU Storage Feedback Channel Conditional Access external device

軟體則有操作解譯與應用三大方面

18

IPTV STB硬體結構

Fig STB 系統架構圖

19

IPTV STB 軟體結構 (1)嵌入式WinCE 終端 優 支援Windows 套件 缺 原始碼不公開 WinCE佔用許多 ROM

RAM (2)嵌入式 Linux 終端 優 原始碼公開技術交流方便維護成本低 缺 解碼器性能需芯片支援 (3)other software Ex VxWorks

20

STB 設備分類與功能定位 Entry-level digital set-top box 接受數位廣播電視為主要功能並具有按次計費 (pay-per-view PPV) 的系統功能與基本的瀏覽工 具這類設備的特色包括低成本以及有限的記 憶容量輸出入介面及運算能力 Mid-range digital set-top 1048699 具有回傳的管道因此能提供與系統業者在頭端 (head-end) 的伺服器進行溝通此外不論在處 理效能或儲存能力上都比入門級數位 STB還強上 一倍以上

21

STB 設備分類與功能定位 High-range digital set-top box 功能更強幾可比擬多媒體桌上型電腦它的運算能力可

以是低階廣播電視 STB 的十倍以上例如在儲存能力上一般有 32-64Mbyte 的 Flash 記憶容量也有高速的回傳管道來提供多種進階服務此外它的繪圖功能也很強能讓收視戶收看高畫質電視訊號

在高階 STB 的市場上又有多種不同的功能定位例如有些高階設備更提供了個人錄影機 (Personal Video RecorderPVR) 的功能也就是在 STB 中置入硬碟讓 STB 有足夠的儲存容量錄製節目不僅如此新的 IP STB 設備還具有家庭網路的連接埠讓 STB 進一步成為家用閘道器 (Residential Gateway)

22

STB 與 IPTV 接口 STB 與 IPTV 平台接口包含網路層認證與

應用層認證按照目前用戶與網路間的通訊方式分為以下三種

(1) 認證接口 PPPoE 與 DHCP+WEB驗證 (2) 用戶消費接口 依照系統價格提示用戶確認購買系統實現扣費的一個消費流程

(3)服務使用接口 實現用戶從內容營運商獲得不同應用服務的過程

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 3: IPTV STB and QoS/QoE

3

IPTV introduce

由於以 IP 為基礎的寬頻網路發展迅速網路承載能力不斷提高因此為了能夠提升 IP 網路業務促進 IP 網路普及與發展將數位電視的豐富媒體資源引入 IP 網路中而 IPTV 就是在 IP 網路與傳統電視業務融合產生的新的業務主要特點在於交互性和即時性

4

IPTV introduce

Fig IPTV 架構圖

5

IPTV introduce

Fig IPTV deployment topology and available delivery schemes

6

IPTV STB Overview

Set-Top Box (STB) 是在很廣泛的産品名詞在中文譯爲視訊轉換器機頂盒或機上盒其代表的功能則從過去的類比選台器電視上網機一路發展下來目前的 STB 已可以涵蓋家庭閘道器或個人視訊錄

放影機 (PVR) 的産品定位

7

IPTV STB Overview

IPTV 用戶端負責接收處理儲存播放轉發數據文件 EPGhellip 等 IPTV 終端有三種基本類型 PC 手機 STB+ 電視 STB 須具備包括數據轉換接入支持 (FTTH XD

SL HFChellip 等 ) 業務支持解碼支持協議支持DRM 內容緩存等功能

Entry-level digital set-top box Mid-range digital set-top box High-range digital set-top box

8

IPTV STB Overview

IP STB 的功能定位示意圖

9

IPTV STB technique requirement

業務能力要求 IPTV 機頂盒需要支持基本業務和擴展業務

功能 基本業務包括直播點播時移電視 擴展業務包括可視業務網路遊戲訊息

交換

10

IPTV STB technique requirement

功能要求 STB 設備在 IPTV 中需要實現承上啟下的作

用一方面接收業務系統的媒體串流另一方面要實現對用戶業務播放過程的控制STB 作為業務網路用戶接入設備須有一系列的管理功能 管理功能通訊協議業務功能在 STB 標準僅對媒體處理交互功能管理功能安全和環境做具體規範

11

IPTV STB technique requirement

(1) 媒體處理功能要求 需支持基本業務和擴展業務所需媒體處理 功能基本業

務可在 MPEG-2 MPEG-4 H264 SMPTE 音頻解碼採用 MPEG-24 AAC(Advanced Audio Coding) MP3 Dolby AC 351

擴展業務需支持 CIF(Common Intermediate Format ) QCIF(Quater Common Intermediate Format) H261 H263 音頻以 G711 為標準亦可採 G723 G728 G729 為標準

12

IPTV STB technique requirement

(2) 交互功能要求 STB 需提供內容交互選擇和內容交互控制

兩類交互功能內容交互選擇利用選單選擇內容進行節目檢索與認證系統交互認證訊息內容交互控制主要針對實現點播業務時機頂盒與業務平台間應具有交互控制命令以控制內容訊息功能

13

IPTV STB technique requirement

(3) 管理功能要求 a 軟體升級 透過本地網路或是連至外部網路下

載安裝最新套件以獲取新業務的能力 b 日記功能 針對本機版本訊息及系統訊息的管

理與錯誤訊息的診斷並產生兩份備份文件 c 遠端配置功能 重新啟動下載恢復設定等 d 本地配置功能 遙控器對 STB 訊息配置網入

連接帳號密碼等

14

IPTV STB technique requirement

外部接入要求 - 外部接口基本須包含三類 網路音視訊及紅外線遙

控接口根據需要還可擴展 - 網路接口 包括 10100Base-T xDSL 無線接口 - 音視訊接口 類比數位音訊視訊接口 -紅外線遙控接口 規定紅外線遙控器對機頂盒控制傳輸距離紅外線發射角度和接收最小角度具體性能要求應符合 IrDA11(Infrared Data Association) 協議

-輔助接口 USB

15

IPTV STB technique requirement

通信協議要求 IPTV STB 為網路接入的終端設備必須支援一

系列的業務與 IP 機頂盒標準將所涉及 IP歸納為

接入過程 PPPoE DHCP IEEE8021x

文件傳送 TFTP FTP HTTP

媒體傳送 RTP RTSP

媒體播放 IGMP

16

IPTV STB technique requirement

安全要求 - 安全認證要求 STB 需支持 AAA(Authentication

Authorization and Accounting ) 接入 IP 網路應提供必要的訊息經認證授權後才可使用 IPTV業務

- 數位版權 (DRM) 管理安全要求 供應商送到用戶終端的訊息應具有 DRM 的訊息在 STB 中須有針對業務平台的 DRM 版本提供內容版權的保護

17

IPTV STB 功能結構 因為 IPTV STB 提供三網融合的業務做到 triple

play 可以建立 IP化的家庭環境 目前可支援 IPTV 產品大致分為 Entry-level digita

l set-top box Mid-range digital set-top box High-range digital set-top box

STB 由軟硬體所構成硬體包含 CPU Storage Feedback Channel Conditional Access external device

軟體則有操作解譯與應用三大方面

18

IPTV STB硬體結構

Fig STB 系統架構圖

19

IPTV STB 軟體結構 (1)嵌入式WinCE 終端 優 支援Windows 套件 缺 原始碼不公開 WinCE佔用許多 ROM

RAM (2)嵌入式 Linux 終端 優 原始碼公開技術交流方便維護成本低 缺 解碼器性能需芯片支援 (3)other software Ex VxWorks

20

STB 設備分類與功能定位 Entry-level digital set-top box 接受數位廣播電視為主要功能並具有按次計費 (pay-per-view PPV) 的系統功能與基本的瀏覽工 具這類設備的特色包括低成本以及有限的記 憶容量輸出入介面及運算能力 Mid-range digital set-top 1048699 具有回傳的管道因此能提供與系統業者在頭端 (head-end) 的伺服器進行溝通此外不論在處 理效能或儲存能力上都比入門級數位 STB還強上 一倍以上

21

STB 設備分類與功能定位 High-range digital set-top box 功能更強幾可比擬多媒體桌上型電腦它的運算能力可

以是低階廣播電視 STB 的十倍以上例如在儲存能力上一般有 32-64Mbyte 的 Flash 記憶容量也有高速的回傳管道來提供多種進階服務此外它的繪圖功能也很強能讓收視戶收看高畫質電視訊號

在高階 STB 的市場上又有多種不同的功能定位例如有些高階設備更提供了個人錄影機 (Personal Video RecorderPVR) 的功能也就是在 STB 中置入硬碟讓 STB 有足夠的儲存容量錄製節目不僅如此新的 IP STB 設備還具有家庭網路的連接埠讓 STB 進一步成為家用閘道器 (Residential Gateway)

22

STB 與 IPTV 接口 STB 與 IPTV 平台接口包含網路層認證與

應用層認證按照目前用戶與網路間的通訊方式分為以下三種

(1) 認證接口 PPPoE 與 DHCP+WEB驗證 (2) 用戶消費接口 依照系統價格提示用戶確認購買系統實現扣費的一個消費流程

(3)服務使用接口 實現用戶從內容營運商獲得不同應用服務的過程

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 4: IPTV STB and QoS/QoE

4

IPTV introduce

Fig IPTV 架構圖

5

IPTV introduce

Fig IPTV deployment topology and available delivery schemes

6

IPTV STB Overview

Set-Top Box (STB) 是在很廣泛的産品名詞在中文譯爲視訊轉換器機頂盒或機上盒其代表的功能則從過去的類比選台器電視上網機一路發展下來目前的 STB 已可以涵蓋家庭閘道器或個人視訊錄

放影機 (PVR) 的産品定位

7

IPTV STB Overview

IPTV 用戶端負責接收處理儲存播放轉發數據文件 EPGhellip 等 IPTV 終端有三種基本類型 PC 手機 STB+ 電視 STB 須具備包括數據轉換接入支持 (FTTH XD

SL HFChellip 等 ) 業務支持解碼支持協議支持DRM 內容緩存等功能

Entry-level digital set-top box Mid-range digital set-top box High-range digital set-top box

8

IPTV STB Overview

IP STB 的功能定位示意圖

9

IPTV STB technique requirement

業務能力要求 IPTV 機頂盒需要支持基本業務和擴展業務

功能 基本業務包括直播點播時移電視 擴展業務包括可視業務網路遊戲訊息

交換

10

IPTV STB technique requirement

功能要求 STB 設備在 IPTV 中需要實現承上啟下的作

用一方面接收業務系統的媒體串流另一方面要實現對用戶業務播放過程的控制STB 作為業務網路用戶接入設備須有一系列的管理功能 管理功能通訊協議業務功能在 STB 標準僅對媒體處理交互功能管理功能安全和環境做具體規範

11

IPTV STB technique requirement

(1) 媒體處理功能要求 需支持基本業務和擴展業務所需媒體處理 功能基本業

務可在 MPEG-2 MPEG-4 H264 SMPTE 音頻解碼採用 MPEG-24 AAC(Advanced Audio Coding) MP3 Dolby AC 351

擴展業務需支持 CIF(Common Intermediate Format ) QCIF(Quater Common Intermediate Format) H261 H263 音頻以 G711 為標準亦可採 G723 G728 G729 為標準

12

IPTV STB technique requirement

(2) 交互功能要求 STB 需提供內容交互選擇和內容交互控制

兩類交互功能內容交互選擇利用選單選擇內容進行節目檢索與認證系統交互認證訊息內容交互控制主要針對實現點播業務時機頂盒與業務平台間應具有交互控制命令以控制內容訊息功能

13

IPTV STB technique requirement

(3) 管理功能要求 a 軟體升級 透過本地網路或是連至外部網路下

載安裝最新套件以獲取新業務的能力 b 日記功能 針對本機版本訊息及系統訊息的管

理與錯誤訊息的診斷並產生兩份備份文件 c 遠端配置功能 重新啟動下載恢復設定等 d 本地配置功能 遙控器對 STB 訊息配置網入

連接帳號密碼等

14

IPTV STB technique requirement

外部接入要求 - 外部接口基本須包含三類 網路音視訊及紅外線遙

控接口根據需要還可擴展 - 網路接口 包括 10100Base-T xDSL 無線接口 - 音視訊接口 類比數位音訊視訊接口 -紅外線遙控接口 規定紅外線遙控器對機頂盒控制傳輸距離紅外線發射角度和接收最小角度具體性能要求應符合 IrDA11(Infrared Data Association) 協議

-輔助接口 USB

15

IPTV STB technique requirement

通信協議要求 IPTV STB 為網路接入的終端設備必須支援一

系列的業務與 IP 機頂盒標準將所涉及 IP歸納為

接入過程 PPPoE DHCP IEEE8021x

文件傳送 TFTP FTP HTTP

媒體傳送 RTP RTSP

媒體播放 IGMP

16

IPTV STB technique requirement

安全要求 - 安全認證要求 STB 需支持 AAA(Authentication

Authorization and Accounting ) 接入 IP 網路應提供必要的訊息經認證授權後才可使用 IPTV業務

- 數位版權 (DRM) 管理安全要求 供應商送到用戶終端的訊息應具有 DRM 的訊息在 STB 中須有針對業務平台的 DRM 版本提供內容版權的保護

17

IPTV STB 功能結構 因為 IPTV STB 提供三網融合的業務做到 triple

play 可以建立 IP化的家庭環境 目前可支援 IPTV 產品大致分為 Entry-level digita

l set-top box Mid-range digital set-top box High-range digital set-top box

STB 由軟硬體所構成硬體包含 CPU Storage Feedback Channel Conditional Access external device

軟體則有操作解譯與應用三大方面

18

IPTV STB硬體結構

Fig STB 系統架構圖

19

IPTV STB 軟體結構 (1)嵌入式WinCE 終端 優 支援Windows 套件 缺 原始碼不公開 WinCE佔用許多 ROM

RAM (2)嵌入式 Linux 終端 優 原始碼公開技術交流方便維護成本低 缺 解碼器性能需芯片支援 (3)other software Ex VxWorks

20

STB 設備分類與功能定位 Entry-level digital set-top box 接受數位廣播電視為主要功能並具有按次計費 (pay-per-view PPV) 的系統功能與基本的瀏覽工 具這類設備的特色包括低成本以及有限的記 憶容量輸出入介面及運算能力 Mid-range digital set-top 1048699 具有回傳的管道因此能提供與系統業者在頭端 (head-end) 的伺服器進行溝通此外不論在處 理效能或儲存能力上都比入門級數位 STB還強上 一倍以上

21

STB 設備分類與功能定位 High-range digital set-top box 功能更強幾可比擬多媒體桌上型電腦它的運算能力可

以是低階廣播電視 STB 的十倍以上例如在儲存能力上一般有 32-64Mbyte 的 Flash 記憶容量也有高速的回傳管道來提供多種進階服務此外它的繪圖功能也很強能讓收視戶收看高畫質電視訊號

在高階 STB 的市場上又有多種不同的功能定位例如有些高階設備更提供了個人錄影機 (Personal Video RecorderPVR) 的功能也就是在 STB 中置入硬碟讓 STB 有足夠的儲存容量錄製節目不僅如此新的 IP STB 設備還具有家庭網路的連接埠讓 STB 進一步成為家用閘道器 (Residential Gateway)

22

STB 與 IPTV 接口 STB 與 IPTV 平台接口包含網路層認證與

應用層認證按照目前用戶與網路間的通訊方式分為以下三種

(1) 認證接口 PPPoE 與 DHCP+WEB驗證 (2) 用戶消費接口 依照系統價格提示用戶確認購買系統實現扣費的一個消費流程

(3)服務使用接口 實現用戶從內容營運商獲得不同應用服務的過程

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 5: IPTV STB and QoS/QoE

5

IPTV introduce

Fig IPTV deployment topology and available delivery schemes

6

IPTV STB Overview

Set-Top Box (STB) 是在很廣泛的産品名詞在中文譯爲視訊轉換器機頂盒或機上盒其代表的功能則從過去的類比選台器電視上網機一路發展下來目前的 STB 已可以涵蓋家庭閘道器或個人視訊錄

放影機 (PVR) 的産品定位

7

IPTV STB Overview

IPTV 用戶端負責接收處理儲存播放轉發數據文件 EPGhellip 等 IPTV 終端有三種基本類型 PC 手機 STB+ 電視 STB 須具備包括數據轉換接入支持 (FTTH XD

SL HFChellip 等 ) 業務支持解碼支持協議支持DRM 內容緩存等功能

Entry-level digital set-top box Mid-range digital set-top box High-range digital set-top box

8

IPTV STB Overview

IP STB 的功能定位示意圖

9

IPTV STB technique requirement

業務能力要求 IPTV 機頂盒需要支持基本業務和擴展業務

功能 基本業務包括直播點播時移電視 擴展業務包括可視業務網路遊戲訊息

交換

10

IPTV STB technique requirement

功能要求 STB 設備在 IPTV 中需要實現承上啟下的作

用一方面接收業務系統的媒體串流另一方面要實現對用戶業務播放過程的控制STB 作為業務網路用戶接入設備須有一系列的管理功能 管理功能通訊協議業務功能在 STB 標準僅對媒體處理交互功能管理功能安全和環境做具體規範

11

IPTV STB technique requirement

(1) 媒體處理功能要求 需支持基本業務和擴展業務所需媒體處理 功能基本業

務可在 MPEG-2 MPEG-4 H264 SMPTE 音頻解碼採用 MPEG-24 AAC(Advanced Audio Coding) MP3 Dolby AC 351

擴展業務需支持 CIF(Common Intermediate Format ) QCIF(Quater Common Intermediate Format) H261 H263 音頻以 G711 為標準亦可採 G723 G728 G729 為標準

12

IPTV STB technique requirement

(2) 交互功能要求 STB 需提供內容交互選擇和內容交互控制

兩類交互功能內容交互選擇利用選單選擇內容進行節目檢索與認證系統交互認證訊息內容交互控制主要針對實現點播業務時機頂盒與業務平台間應具有交互控制命令以控制內容訊息功能

13

IPTV STB technique requirement

(3) 管理功能要求 a 軟體升級 透過本地網路或是連至外部網路下

載安裝最新套件以獲取新業務的能力 b 日記功能 針對本機版本訊息及系統訊息的管

理與錯誤訊息的診斷並產生兩份備份文件 c 遠端配置功能 重新啟動下載恢復設定等 d 本地配置功能 遙控器對 STB 訊息配置網入

連接帳號密碼等

14

IPTV STB technique requirement

外部接入要求 - 外部接口基本須包含三類 網路音視訊及紅外線遙

控接口根據需要還可擴展 - 網路接口 包括 10100Base-T xDSL 無線接口 - 音視訊接口 類比數位音訊視訊接口 -紅外線遙控接口 規定紅外線遙控器對機頂盒控制傳輸距離紅外線發射角度和接收最小角度具體性能要求應符合 IrDA11(Infrared Data Association) 協議

-輔助接口 USB

15

IPTV STB technique requirement

通信協議要求 IPTV STB 為網路接入的終端設備必須支援一

系列的業務與 IP 機頂盒標準將所涉及 IP歸納為

接入過程 PPPoE DHCP IEEE8021x

文件傳送 TFTP FTP HTTP

媒體傳送 RTP RTSP

媒體播放 IGMP

16

IPTV STB technique requirement

安全要求 - 安全認證要求 STB 需支持 AAA(Authentication

Authorization and Accounting ) 接入 IP 網路應提供必要的訊息經認證授權後才可使用 IPTV業務

- 數位版權 (DRM) 管理安全要求 供應商送到用戶終端的訊息應具有 DRM 的訊息在 STB 中須有針對業務平台的 DRM 版本提供內容版權的保護

17

IPTV STB 功能結構 因為 IPTV STB 提供三網融合的業務做到 triple

play 可以建立 IP化的家庭環境 目前可支援 IPTV 產品大致分為 Entry-level digita

l set-top box Mid-range digital set-top box High-range digital set-top box

STB 由軟硬體所構成硬體包含 CPU Storage Feedback Channel Conditional Access external device

軟體則有操作解譯與應用三大方面

18

IPTV STB硬體結構

Fig STB 系統架構圖

19

IPTV STB 軟體結構 (1)嵌入式WinCE 終端 優 支援Windows 套件 缺 原始碼不公開 WinCE佔用許多 ROM

RAM (2)嵌入式 Linux 終端 優 原始碼公開技術交流方便維護成本低 缺 解碼器性能需芯片支援 (3)other software Ex VxWorks

20

STB 設備分類與功能定位 Entry-level digital set-top box 接受數位廣播電視為主要功能並具有按次計費 (pay-per-view PPV) 的系統功能與基本的瀏覽工 具這類設備的特色包括低成本以及有限的記 憶容量輸出入介面及運算能力 Mid-range digital set-top 1048699 具有回傳的管道因此能提供與系統業者在頭端 (head-end) 的伺服器進行溝通此外不論在處 理效能或儲存能力上都比入門級數位 STB還強上 一倍以上

21

STB 設備分類與功能定位 High-range digital set-top box 功能更強幾可比擬多媒體桌上型電腦它的運算能力可

以是低階廣播電視 STB 的十倍以上例如在儲存能力上一般有 32-64Mbyte 的 Flash 記憶容量也有高速的回傳管道來提供多種進階服務此外它的繪圖功能也很強能讓收視戶收看高畫質電視訊號

在高階 STB 的市場上又有多種不同的功能定位例如有些高階設備更提供了個人錄影機 (Personal Video RecorderPVR) 的功能也就是在 STB 中置入硬碟讓 STB 有足夠的儲存容量錄製節目不僅如此新的 IP STB 設備還具有家庭網路的連接埠讓 STB 進一步成為家用閘道器 (Residential Gateway)

22

STB 與 IPTV 接口 STB 與 IPTV 平台接口包含網路層認證與

應用層認證按照目前用戶與網路間的通訊方式分為以下三種

(1) 認證接口 PPPoE 與 DHCP+WEB驗證 (2) 用戶消費接口 依照系統價格提示用戶確認購買系統實現扣費的一個消費流程

(3)服務使用接口 實現用戶從內容營運商獲得不同應用服務的過程

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 6: IPTV STB and QoS/QoE

6

IPTV STB Overview

Set-Top Box (STB) 是在很廣泛的産品名詞在中文譯爲視訊轉換器機頂盒或機上盒其代表的功能則從過去的類比選台器電視上網機一路發展下來目前的 STB 已可以涵蓋家庭閘道器或個人視訊錄

放影機 (PVR) 的産品定位

7

IPTV STB Overview

IPTV 用戶端負責接收處理儲存播放轉發數據文件 EPGhellip 等 IPTV 終端有三種基本類型 PC 手機 STB+ 電視 STB 須具備包括數據轉換接入支持 (FTTH XD

SL HFChellip 等 ) 業務支持解碼支持協議支持DRM 內容緩存等功能

Entry-level digital set-top box Mid-range digital set-top box High-range digital set-top box

8

IPTV STB Overview

IP STB 的功能定位示意圖

9

IPTV STB technique requirement

業務能力要求 IPTV 機頂盒需要支持基本業務和擴展業務

功能 基本業務包括直播點播時移電視 擴展業務包括可視業務網路遊戲訊息

交換

10

IPTV STB technique requirement

功能要求 STB 設備在 IPTV 中需要實現承上啟下的作

用一方面接收業務系統的媒體串流另一方面要實現對用戶業務播放過程的控制STB 作為業務網路用戶接入設備須有一系列的管理功能 管理功能通訊協議業務功能在 STB 標準僅對媒體處理交互功能管理功能安全和環境做具體規範

11

IPTV STB technique requirement

(1) 媒體處理功能要求 需支持基本業務和擴展業務所需媒體處理 功能基本業

務可在 MPEG-2 MPEG-4 H264 SMPTE 音頻解碼採用 MPEG-24 AAC(Advanced Audio Coding) MP3 Dolby AC 351

擴展業務需支持 CIF(Common Intermediate Format ) QCIF(Quater Common Intermediate Format) H261 H263 音頻以 G711 為標準亦可採 G723 G728 G729 為標準

12

IPTV STB technique requirement

(2) 交互功能要求 STB 需提供內容交互選擇和內容交互控制

兩類交互功能內容交互選擇利用選單選擇內容進行節目檢索與認證系統交互認證訊息內容交互控制主要針對實現點播業務時機頂盒與業務平台間應具有交互控制命令以控制內容訊息功能

13

IPTV STB technique requirement

(3) 管理功能要求 a 軟體升級 透過本地網路或是連至外部網路下

載安裝最新套件以獲取新業務的能力 b 日記功能 針對本機版本訊息及系統訊息的管

理與錯誤訊息的診斷並產生兩份備份文件 c 遠端配置功能 重新啟動下載恢復設定等 d 本地配置功能 遙控器對 STB 訊息配置網入

連接帳號密碼等

14

IPTV STB technique requirement

外部接入要求 - 外部接口基本須包含三類 網路音視訊及紅外線遙

控接口根據需要還可擴展 - 網路接口 包括 10100Base-T xDSL 無線接口 - 音視訊接口 類比數位音訊視訊接口 -紅外線遙控接口 規定紅外線遙控器對機頂盒控制傳輸距離紅外線發射角度和接收最小角度具體性能要求應符合 IrDA11(Infrared Data Association) 協議

-輔助接口 USB

15

IPTV STB technique requirement

通信協議要求 IPTV STB 為網路接入的終端設備必須支援一

系列的業務與 IP 機頂盒標準將所涉及 IP歸納為

接入過程 PPPoE DHCP IEEE8021x

文件傳送 TFTP FTP HTTP

媒體傳送 RTP RTSP

媒體播放 IGMP

16

IPTV STB technique requirement

安全要求 - 安全認證要求 STB 需支持 AAA(Authentication

Authorization and Accounting ) 接入 IP 網路應提供必要的訊息經認證授權後才可使用 IPTV業務

- 數位版權 (DRM) 管理安全要求 供應商送到用戶終端的訊息應具有 DRM 的訊息在 STB 中須有針對業務平台的 DRM 版本提供內容版權的保護

17

IPTV STB 功能結構 因為 IPTV STB 提供三網融合的業務做到 triple

play 可以建立 IP化的家庭環境 目前可支援 IPTV 產品大致分為 Entry-level digita

l set-top box Mid-range digital set-top box High-range digital set-top box

STB 由軟硬體所構成硬體包含 CPU Storage Feedback Channel Conditional Access external device

軟體則有操作解譯與應用三大方面

18

IPTV STB硬體結構

Fig STB 系統架構圖

19

IPTV STB 軟體結構 (1)嵌入式WinCE 終端 優 支援Windows 套件 缺 原始碼不公開 WinCE佔用許多 ROM

RAM (2)嵌入式 Linux 終端 優 原始碼公開技術交流方便維護成本低 缺 解碼器性能需芯片支援 (3)other software Ex VxWorks

20

STB 設備分類與功能定位 Entry-level digital set-top box 接受數位廣播電視為主要功能並具有按次計費 (pay-per-view PPV) 的系統功能與基本的瀏覽工 具這類設備的特色包括低成本以及有限的記 憶容量輸出入介面及運算能力 Mid-range digital set-top 1048699 具有回傳的管道因此能提供與系統業者在頭端 (head-end) 的伺服器進行溝通此外不論在處 理效能或儲存能力上都比入門級數位 STB還強上 一倍以上

21

STB 設備分類與功能定位 High-range digital set-top box 功能更強幾可比擬多媒體桌上型電腦它的運算能力可

以是低階廣播電視 STB 的十倍以上例如在儲存能力上一般有 32-64Mbyte 的 Flash 記憶容量也有高速的回傳管道來提供多種進階服務此外它的繪圖功能也很強能讓收視戶收看高畫質電視訊號

在高階 STB 的市場上又有多種不同的功能定位例如有些高階設備更提供了個人錄影機 (Personal Video RecorderPVR) 的功能也就是在 STB 中置入硬碟讓 STB 有足夠的儲存容量錄製節目不僅如此新的 IP STB 設備還具有家庭網路的連接埠讓 STB 進一步成為家用閘道器 (Residential Gateway)

22

STB 與 IPTV 接口 STB 與 IPTV 平台接口包含網路層認證與

應用層認證按照目前用戶與網路間的通訊方式分為以下三種

(1) 認證接口 PPPoE 與 DHCP+WEB驗證 (2) 用戶消費接口 依照系統價格提示用戶確認購買系統實現扣費的一個消費流程

(3)服務使用接口 實現用戶從內容營運商獲得不同應用服務的過程

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 7: IPTV STB and QoS/QoE

7

IPTV STB Overview

IPTV 用戶端負責接收處理儲存播放轉發數據文件 EPGhellip 等 IPTV 終端有三種基本類型 PC 手機 STB+ 電視 STB 須具備包括數據轉換接入支持 (FTTH XD

SL HFChellip 等 ) 業務支持解碼支持協議支持DRM 內容緩存等功能

Entry-level digital set-top box Mid-range digital set-top box High-range digital set-top box

8

IPTV STB Overview

IP STB 的功能定位示意圖

9

IPTV STB technique requirement

業務能力要求 IPTV 機頂盒需要支持基本業務和擴展業務

功能 基本業務包括直播點播時移電視 擴展業務包括可視業務網路遊戲訊息

交換

10

IPTV STB technique requirement

功能要求 STB 設備在 IPTV 中需要實現承上啟下的作

用一方面接收業務系統的媒體串流另一方面要實現對用戶業務播放過程的控制STB 作為業務網路用戶接入設備須有一系列的管理功能 管理功能通訊協議業務功能在 STB 標準僅對媒體處理交互功能管理功能安全和環境做具體規範

11

IPTV STB technique requirement

(1) 媒體處理功能要求 需支持基本業務和擴展業務所需媒體處理 功能基本業

務可在 MPEG-2 MPEG-4 H264 SMPTE 音頻解碼採用 MPEG-24 AAC(Advanced Audio Coding) MP3 Dolby AC 351

擴展業務需支持 CIF(Common Intermediate Format ) QCIF(Quater Common Intermediate Format) H261 H263 音頻以 G711 為標準亦可採 G723 G728 G729 為標準

12

IPTV STB technique requirement

(2) 交互功能要求 STB 需提供內容交互選擇和內容交互控制

兩類交互功能內容交互選擇利用選單選擇內容進行節目檢索與認證系統交互認證訊息內容交互控制主要針對實現點播業務時機頂盒與業務平台間應具有交互控制命令以控制內容訊息功能

13

IPTV STB technique requirement

(3) 管理功能要求 a 軟體升級 透過本地網路或是連至外部網路下

載安裝最新套件以獲取新業務的能力 b 日記功能 針對本機版本訊息及系統訊息的管

理與錯誤訊息的診斷並產生兩份備份文件 c 遠端配置功能 重新啟動下載恢復設定等 d 本地配置功能 遙控器對 STB 訊息配置網入

連接帳號密碼等

14

IPTV STB technique requirement

外部接入要求 - 外部接口基本須包含三類 網路音視訊及紅外線遙

控接口根據需要還可擴展 - 網路接口 包括 10100Base-T xDSL 無線接口 - 音視訊接口 類比數位音訊視訊接口 -紅外線遙控接口 規定紅外線遙控器對機頂盒控制傳輸距離紅外線發射角度和接收最小角度具體性能要求應符合 IrDA11(Infrared Data Association) 協議

-輔助接口 USB

15

IPTV STB technique requirement

通信協議要求 IPTV STB 為網路接入的終端設備必須支援一

系列的業務與 IP 機頂盒標準將所涉及 IP歸納為

接入過程 PPPoE DHCP IEEE8021x

文件傳送 TFTP FTP HTTP

媒體傳送 RTP RTSP

媒體播放 IGMP

16

IPTV STB technique requirement

安全要求 - 安全認證要求 STB 需支持 AAA(Authentication

Authorization and Accounting ) 接入 IP 網路應提供必要的訊息經認證授權後才可使用 IPTV業務

- 數位版權 (DRM) 管理安全要求 供應商送到用戶終端的訊息應具有 DRM 的訊息在 STB 中須有針對業務平台的 DRM 版本提供內容版權的保護

17

IPTV STB 功能結構 因為 IPTV STB 提供三網融合的業務做到 triple

play 可以建立 IP化的家庭環境 目前可支援 IPTV 產品大致分為 Entry-level digita

l set-top box Mid-range digital set-top box High-range digital set-top box

STB 由軟硬體所構成硬體包含 CPU Storage Feedback Channel Conditional Access external device

軟體則有操作解譯與應用三大方面

18

IPTV STB硬體結構

Fig STB 系統架構圖

19

IPTV STB 軟體結構 (1)嵌入式WinCE 終端 優 支援Windows 套件 缺 原始碼不公開 WinCE佔用許多 ROM

RAM (2)嵌入式 Linux 終端 優 原始碼公開技術交流方便維護成本低 缺 解碼器性能需芯片支援 (3)other software Ex VxWorks

20

STB 設備分類與功能定位 Entry-level digital set-top box 接受數位廣播電視為主要功能並具有按次計費 (pay-per-view PPV) 的系統功能與基本的瀏覽工 具這類設備的特色包括低成本以及有限的記 憶容量輸出入介面及運算能力 Mid-range digital set-top 1048699 具有回傳的管道因此能提供與系統業者在頭端 (head-end) 的伺服器進行溝通此外不論在處 理效能或儲存能力上都比入門級數位 STB還強上 一倍以上

21

STB 設備分類與功能定位 High-range digital set-top box 功能更強幾可比擬多媒體桌上型電腦它的運算能力可

以是低階廣播電視 STB 的十倍以上例如在儲存能力上一般有 32-64Mbyte 的 Flash 記憶容量也有高速的回傳管道來提供多種進階服務此外它的繪圖功能也很強能讓收視戶收看高畫質電視訊號

在高階 STB 的市場上又有多種不同的功能定位例如有些高階設備更提供了個人錄影機 (Personal Video RecorderPVR) 的功能也就是在 STB 中置入硬碟讓 STB 有足夠的儲存容量錄製節目不僅如此新的 IP STB 設備還具有家庭網路的連接埠讓 STB 進一步成為家用閘道器 (Residential Gateway)

22

STB 與 IPTV 接口 STB 與 IPTV 平台接口包含網路層認證與

應用層認證按照目前用戶與網路間的通訊方式分為以下三種

(1) 認證接口 PPPoE 與 DHCP+WEB驗證 (2) 用戶消費接口 依照系統價格提示用戶確認購買系統實現扣費的一個消費流程

(3)服務使用接口 實現用戶從內容營運商獲得不同應用服務的過程

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 8: IPTV STB and QoS/QoE

8

IPTV STB Overview

IP STB 的功能定位示意圖

9

IPTV STB technique requirement

業務能力要求 IPTV 機頂盒需要支持基本業務和擴展業務

功能 基本業務包括直播點播時移電視 擴展業務包括可視業務網路遊戲訊息

交換

10

IPTV STB technique requirement

功能要求 STB 設備在 IPTV 中需要實現承上啟下的作

用一方面接收業務系統的媒體串流另一方面要實現對用戶業務播放過程的控制STB 作為業務網路用戶接入設備須有一系列的管理功能 管理功能通訊協議業務功能在 STB 標準僅對媒體處理交互功能管理功能安全和環境做具體規範

11

IPTV STB technique requirement

(1) 媒體處理功能要求 需支持基本業務和擴展業務所需媒體處理 功能基本業

務可在 MPEG-2 MPEG-4 H264 SMPTE 音頻解碼採用 MPEG-24 AAC(Advanced Audio Coding) MP3 Dolby AC 351

擴展業務需支持 CIF(Common Intermediate Format ) QCIF(Quater Common Intermediate Format) H261 H263 音頻以 G711 為標準亦可採 G723 G728 G729 為標準

12

IPTV STB technique requirement

(2) 交互功能要求 STB 需提供內容交互選擇和內容交互控制

兩類交互功能內容交互選擇利用選單選擇內容進行節目檢索與認證系統交互認證訊息內容交互控制主要針對實現點播業務時機頂盒與業務平台間應具有交互控制命令以控制內容訊息功能

13

IPTV STB technique requirement

(3) 管理功能要求 a 軟體升級 透過本地網路或是連至外部網路下

載安裝最新套件以獲取新業務的能力 b 日記功能 針對本機版本訊息及系統訊息的管

理與錯誤訊息的診斷並產生兩份備份文件 c 遠端配置功能 重新啟動下載恢復設定等 d 本地配置功能 遙控器對 STB 訊息配置網入

連接帳號密碼等

14

IPTV STB technique requirement

外部接入要求 - 外部接口基本須包含三類 網路音視訊及紅外線遙

控接口根據需要還可擴展 - 網路接口 包括 10100Base-T xDSL 無線接口 - 音視訊接口 類比數位音訊視訊接口 -紅外線遙控接口 規定紅外線遙控器對機頂盒控制傳輸距離紅外線發射角度和接收最小角度具體性能要求應符合 IrDA11(Infrared Data Association) 協議

-輔助接口 USB

15

IPTV STB technique requirement

通信協議要求 IPTV STB 為網路接入的終端設備必須支援一

系列的業務與 IP 機頂盒標準將所涉及 IP歸納為

接入過程 PPPoE DHCP IEEE8021x

文件傳送 TFTP FTP HTTP

媒體傳送 RTP RTSP

媒體播放 IGMP

16

IPTV STB technique requirement

安全要求 - 安全認證要求 STB 需支持 AAA(Authentication

Authorization and Accounting ) 接入 IP 網路應提供必要的訊息經認證授權後才可使用 IPTV業務

- 數位版權 (DRM) 管理安全要求 供應商送到用戶終端的訊息應具有 DRM 的訊息在 STB 中須有針對業務平台的 DRM 版本提供內容版權的保護

17

IPTV STB 功能結構 因為 IPTV STB 提供三網融合的業務做到 triple

play 可以建立 IP化的家庭環境 目前可支援 IPTV 產品大致分為 Entry-level digita

l set-top box Mid-range digital set-top box High-range digital set-top box

STB 由軟硬體所構成硬體包含 CPU Storage Feedback Channel Conditional Access external device

軟體則有操作解譯與應用三大方面

18

IPTV STB硬體結構

Fig STB 系統架構圖

19

IPTV STB 軟體結構 (1)嵌入式WinCE 終端 優 支援Windows 套件 缺 原始碼不公開 WinCE佔用許多 ROM

RAM (2)嵌入式 Linux 終端 優 原始碼公開技術交流方便維護成本低 缺 解碼器性能需芯片支援 (3)other software Ex VxWorks

20

STB 設備分類與功能定位 Entry-level digital set-top box 接受數位廣播電視為主要功能並具有按次計費 (pay-per-view PPV) 的系統功能與基本的瀏覽工 具這類設備的特色包括低成本以及有限的記 憶容量輸出入介面及運算能力 Mid-range digital set-top 1048699 具有回傳的管道因此能提供與系統業者在頭端 (head-end) 的伺服器進行溝通此外不論在處 理效能或儲存能力上都比入門級數位 STB還強上 一倍以上

21

STB 設備分類與功能定位 High-range digital set-top box 功能更強幾可比擬多媒體桌上型電腦它的運算能力可

以是低階廣播電視 STB 的十倍以上例如在儲存能力上一般有 32-64Mbyte 的 Flash 記憶容量也有高速的回傳管道來提供多種進階服務此外它的繪圖功能也很強能讓收視戶收看高畫質電視訊號

在高階 STB 的市場上又有多種不同的功能定位例如有些高階設備更提供了個人錄影機 (Personal Video RecorderPVR) 的功能也就是在 STB 中置入硬碟讓 STB 有足夠的儲存容量錄製節目不僅如此新的 IP STB 設備還具有家庭網路的連接埠讓 STB 進一步成為家用閘道器 (Residential Gateway)

22

STB 與 IPTV 接口 STB 與 IPTV 平台接口包含網路層認證與

應用層認證按照目前用戶與網路間的通訊方式分為以下三種

(1) 認證接口 PPPoE 與 DHCP+WEB驗證 (2) 用戶消費接口 依照系統價格提示用戶確認購買系統實現扣費的一個消費流程

(3)服務使用接口 實現用戶從內容營運商獲得不同應用服務的過程

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 9: IPTV STB and QoS/QoE

9

IPTV STB technique requirement

業務能力要求 IPTV 機頂盒需要支持基本業務和擴展業務

功能 基本業務包括直播點播時移電視 擴展業務包括可視業務網路遊戲訊息

交換

10

IPTV STB technique requirement

功能要求 STB 設備在 IPTV 中需要實現承上啟下的作

用一方面接收業務系統的媒體串流另一方面要實現對用戶業務播放過程的控制STB 作為業務網路用戶接入設備須有一系列的管理功能 管理功能通訊協議業務功能在 STB 標準僅對媒體處理交互功能管理功能安全和環境做具體規範

11

IPTV STB technique requirement

(1) 媒體處理功能要求 需支持基本業務和擴展業務所需媒體處理 功能基本業

務可在 MPEG-2 MPEG-4 H264 SMPTE 音頻解碼採用 MPEG-24 AAC(Advanced Audio Coding) MP3 Dolby AC 351

擴展業務需支持 CIF(Common Intermediate Format ) QCIF(Quater Common Intermediate Format) H261 H263 音頻以 G711 為標準亦可採 G723 G728 G729 為標準

12

IPTV STB technique requirement

(2) 交互功能要求 STB 需提供內容交互選擇和內容交互控制

兩類交互功能內容交互選擇利用選單選擇內容進行節目檢索與認證系統交互認證訊息內容交互控制主要針對實現點播業務時機頂盒與業務平台間應具有交互控制命令以控制內容訊息功能

13

IPTV STB technique requirement

(3) 管理功能要求 a 軟體升級 透過本地網路或是連至外部網路下

載安裝最新套件以獲取新業務的能力 b 日記功能 針對本機版本訊息及系統訊息的管

理與錯誤訊息的診斷並產生兩份備份文件 c 遠端配置功能 重新啟動下載恢復設定等 d 本地配置功能 遙控器對 STB 訊息配置網入

連接帳號密碼等

14

IPTV STB technique requirement

外部接入要求 - 外部接口基本須包含三類 網路音視訊及紅外線遙

控接口根據需要還可擴展 - 網路接口 包括 10100Base-T xDSL 無線接口 - 音視訊接口 類比數位音訊視訊接口 -紅外線遙控接口 規定紅外線遙控器對機頂盒控制傳輸距離紅外線發射角度和接收最小角度具體性能要求應符合 IrDA11(Infrared Data Association) 協議

-輔助接口 USB

15

IPTV STB technique requirement

通信協議要求 IPTV STB 為網路接入的終端設備必須支援一

系列的業務與 IP 機頂盒標準將所涉及 IP歸納為

接入過程 PPPoE DHCP IEEE8021x

文件傳送 TFTP FTP HTTP

媒體傳送 RTP RTSP

媒體播放 IGMP

16

IPTV STB technique requirement

安全要求 - 安全認證要求 STB 需支持 AAA(Authentication

Authorization and Accounting ) 接入 IP 網路應提供必要的訊息經認證授權後才可使用 IPTV業務

- 數位版權 (DRM) 管理安全要求 供應商送到用戶終端的訊息應具有 DRM 的訊息在 STB 中須有針對業務平台的 DRM 版本提供內容版權的保護

17

IPTV STB 功能結構 因為 IPTV STB 提供三網融合的業務做到 triple

play 可以建立 IP化的家庭環境 目前可支援 IPTV 產品大致分為 Entry-level digita

l set-top box Mid-range digital set-top box High-range digital set-top box

STB 由軟硬體所構成硬體包含 CPU Storage Feedback Channel Conditional Access external device

軟體則有操作解譯與應用三大方面

18

IPTV STB硬體結構

Fig STB 系統架構圖

19

IPTV STB 軟體結構 (1)嵌入式WinCE 終端 優 支援Windows 套件 缺 原始碼不公開 WinCE佔用許多 ROM

RAM (2)嵌入式 Linux 終端 優 原始碼公開技術交流方便維護成本低 缺 解碼器性能需芯片支援 (3)other software Ex VxWorks

20

STB 設備分類與功能定位 Entry-level digital set-top box 接受數位廣播電視為主要功能並具有按次計費 (pay-per-view PPV) 的系統功能與基本的瀏覽工 具這類設備的特色包括低成本以及有限的記 憶容量輸出入介面及運算能力 Mid-range digital set-top 1048699 具有回傳的管道因此能提供與系統業者在頭端 (head-end) 的伺服器進行溝通此外不論在處 理效能或儲存能力上都比入門級數位 STB還強上 一倍以上

21

STB 設備分類與功能定位 High-range digital set-top box 功能更強幾可比擬多媒體桌上型電腦它的運算能力可

以是低階廣播電視 STB 的十倍以上例如在儲存能力上一般有 32-64Mbyte 的 Flash 記憶容量也有高速的回傳管道來提供多種進階服務此外它的繪圖功能也很強能讓收視戶收看高畫質電視訊號

在高階 STB 的市場上又有多種不同的功能定位例如有些高階設備更提供了個人錄影機 (Personal Video RecorderPVR) 的功能也就是在 STB 中置入硬碟讓 STB 有足夠的儲存容量錄製節目不僅如此新的 IP STB 設備還具有家庭網路的連接埠讓 STB 進一步成為家用閘道器 (Residential Gateway)

22

STB 與 IPTV 接口 STB 與 IPTV 平台接口包含網路層認證與

應用層認證按照目前用戶與網路間的通訊方式分為以下三種

(1) 認證接口 PPPoE 與 DHCP+WEB驗證 (2) 用戶消費接口 依照系統價格提示用戶確認購買系統實現扣費的一個消費流程

(3)服務使用接口 實現用戶從內容營運商獲得不同應用服務的過程

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 10: IPTV STB and QoS/QoE

10

IPTV STB technique requirement

功能要求 STB 設備在 IPTV 中需要實現承上啟下的作

用一方面接收業務系統的媒體串流另一方面要實現對用戶業務播放過程的控制STB 作為業務網路用戶接入設備須有一系列的管理功能 管理功能通訊協議業務功能在 STB 標準僅對媒體處理交互功能管理功能安全和環境做具體規範

11

IPTV STB technique requirement

(1) 媒體處理功能要求 需支持基本業務和擴展業務所需媒體處理 功能基本業

務可在 MPEG-2 MPEG-4 H264 SMPTE 音頻解碼採用 MPEG-24 AAC(Advanced Audio Coding) MP3 Dolby AC 351

擴展業務需支持 CIF(Common Intermediate Format ) QCIF(Quater Common Intermediate Format) H261 H263 音頻以 G711 為標準亦可採 G723 G728 G729 為標準

12

IPTV STB technique requirement

(2) 交互功能要求 STB 需提供內容交互選擇和內容交互控制

兩類交互功能內容交互選擇利用選單選擇內容進行節目檢索與認證系統交互認證訊息內容交互控制主要針對實現點播業務時機頂盒與業務平台間應具有交互控制命令以控制內容訊息功能

13

IPTV STB technique requirement

(3) 管理功能要求 a 軟體升級 透過本地網路或是連至外部網路下

載安裝最新套件以獲取新業務的能力 b 日記功能 針對本機版本訊息及系統訊息的管

理與錯誤訊息的診斷並產生兩份備份文件 c 遠端配置功能 重新啟動下載恢復設定等 d 本地配置功能 遙控器對 STB 訊息配置網入

連接帳號密碼等

14

IPTV STB technique requirement

外部接入要求 - 外部接口基本須包含三類 網路音視訊及紅外線遙

控接口根據需要還可擴展 - 網路接口 包括 10100Base-T xDSL 無線接口 - 音視訊接口 類比數位音訊視訊接口 -紅外線遙控接口 規定紅外線遙控器對機頂盒控制傳輸距離紅外線發射角度和接收最小角度具體性能要求應符合 IrDA11(Infrared Data Association) 協議

-輔助接口 USB

15

IPTV STB technique requirement

通信協議要求 IPTV STB 為網路接入的終端設備必須支援一

系列的業務與 IP 機頂盒標準將所涉及 IP歸納為

接入過程 PPPoE DHCP IEEE8021x

文件傳送 TFTP FTP HTTP

媒體傳送 RTP RTSP

媒體播放 IGMP

16

IPTV STB technique requirement

安全要求 - 安全認證要求 STB 需支持 AAA(Authentication

Authorization and Accounting ) 接入 IP 網路應提供必要的訊息經認證授權後才可使用 IPTV業務

- 數位版權 (DRM) 管理安全要求 供應商送到用戶終端的訊息應具有 DRM 的訊息在 STB 中須有針對業務平台的 DRM 版本提供內容版權的保護

17

IPTV STB 功能結構 因為 IPTV STB 提供三網融合的業務做到 triple

play 可以建立 IP化的家庭環境 目前可支援 IPTV 產品大致分為 Entry-level digita

l set-top box Mid-range digital set-top box High-range digital set-top box

STB 由軟硬體所構成硬體包含 CPU Storage Feedback Channel Conditional Access external device

軟體則有操作解譯與應用三大方面

18

IPTV STB硬體結構

Fig STB 系統架構圖

19

IPTV STB 軟體結構 (1)嵌入式WinCE 終端 優 支援Windows 套件 缺 原始碼不公開 WinCE佔用許多 ROM

RAM (2)嵌入式 Linux 終端 優 原始碼公開技術交流方便維護成本低 缺 解碼器性能需芯片支援 (3)other software Ex VxWorks

20

STB 設備分類與功能定位 Entry-level digital set-top box 接受數位廣播電視為主要功能並具有按次計費 (pay-per-view PPV) 的系統功能與基本的瀏覽工 具這類設備的特色包括低成本以及有限的記 憶容量輸出入介面及運算能力 Mid-range digital set-top 1048699 具有回傳的管道因此能提供與系統業者在頭端 (head-end) 的伺服器進行溝通此外不論在處 理效能或儲存能力上都比入門級數位 STB還強上 一倍以上

21

STB 設備分類與功能定位 High-range digital set-top box 功能更強幾可比擬多媒體桌上型電腦它的運算能力可

以是低階廣播電視 STB 的十倍以上例如在儲存能力上一般有 32-64Mbyte 的 Flash 記憶容量也有高速的回傳管道來提供多種進階服務此外它的繪圖功能也很強能讓收視戶收看高畫質電視訊號

在高階 STB 的市場上又有多種不同的功能定位例如有些高階設備更提供了個人錄影機 (Personal Video RecorderPVR) 的功能也就是在 STB 中置入硬碟讓 STB 有足夠的儲存容量錄製節目不僅如此新的 IP STB 設備還具有家庭網路的連接埠讓 STB 進一步成為家用閘道器 (Residential Gateway)

22

STB 與 IPTV 接口 STB 與 IPTV 平台接口包含網路層認證與

應用層認證按照目前用戶與網路間的通訊方式分為以下三種

(1) 認證接口 PPPoE 與 DHCP+WEB驗證 (2) 用戶消費接口 依照系統價格提示用戶確認購買系統實現扣費的一個消費流程

(3)服務使用接口 實現用戶從內容營運商獲得不同應用服務的過程

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 11: IPTV STB and QoS/QoE

11

IPTV STB technique requirement

(1) 媒體處理功能要求 需支持基本業務和擴展業務所需媒體處理 功能基本業

務可在 MPEG-2 MPEG-4 H264 SMPTE 音頻解碼採用 MPEG-24 AAC(Advanced Audio Coding) MP3 Dolby AC 351

擴展業務需支持 CIF(Common Intermediate Format ) QCIF(Quater Common Intermediate Format) H261 H263 音頻以 G711 為標準亦可採 G723 G728 G729 為標準

12

IPTV STB technique requirement

(2) 交互功能要求 STB 需提供內容交互選擇和內容交互控制

兩類交互功能內容交互選擇利用選單選擇內容進行節目檢索與認證系統交互認證訊息內容交互控制主要針對實現點播業務時機頂盒與業務平台間應具有交互控制命令以控制內容訊息功能

13

IPTV STB technique requirement

(3) 管理功能要求 a 軟體升級 透過本地網路或是連至外部網路下

載安裝最新套件以獲取新業務的能力 b 日記功能 針對本機版本訊息及系統訊息的管

理與錯誤訊息的診斷並產生兩份備份文件 c 遠端配置功能 重新啟動下載恢復設定等 d 本地配置功能 遙控器對 STB 訊息配置網入

連接帳號密碼等

14

IPTV STB technique requirement

外部接入要求 - 外部接口基本須包含三類 網路音視訊及紅外線遙

控接口根據需要還可擴展 - 網路接口 包括 10100Base-T xDSL 無線接口 - 音視訊接口 類比數位音訊視訊接口 -紅外線遙控接口 規定紅外線遙控器對機頂盒控制傳輸距離紅外線發射角度和接收最小角度具體性能要求應符合 IrDA11(Infrared Data Association) 協議

-輔助接口 USB

15

IPTV STB technique requirement

通信協議要求 IPTV STB 為網路接入的終端設備必須支援一

系列的業務與 IP 機頂盒標準將所涉及 IP歸納為

接入過程 PPPoE DHCP IEEE8021x

文件傳送 TFTP FTP HTTP

媒體傳送 RTP RTSP

媒體播放 IGMP

16

IPTV STB technique requirement

安全要求 - 安全認證要求 STB 需支持 AAA(Authentication

Authorization and Accounting ) 接入 IP 網路應提供必要的訊息經認證授權後才可使用 IPTV業務

- 數位版權 (DRM) 管理安全要求 供應商送到用戶終端的訊息應具有 DRM 的訊息在 STB 中須有針對業務平台的 DRM 版本提供內容版權的保護

17

IPTV STB 功能結構 因為 IPTV STB 提供三網融合的業務做到 triple

play 可以建立 IP化的家庭環境 目前可支援 IPTV 產品大致分為 Entry-level digita

l set-top box Mid-range digital set-top box High-range digital set-top box

STB 由軟硬體所構成硬體包含 CPU Storage Feedback Channel Conditional Access external device

軟體則有操作解譯與應用三大方面

18

IPTV STB硬體結構

Fig STB 系統架構圖

19

IPTV STB 軟體結構 (1)嵌入式WinCE 終端 優 支援Windows 套件 缺 原始碼不公開 WinCE佔用許多 ROM

RAM (2)嵌入式 Linux 終端 優 原始碼公開技術交流方便維護成本低 缺 解碼器性能需芯片支援 (3)other software Ex VxWorks

20

STB 設備分類與功能定位 Entry-level digital set-top box 接受數位廣播電視為主要功能並具有按次計費 (pay-per-view PPV) 的系統功能與基本的瀏覽工 具這類設備的特色包括低成本以及有限的記 憶容量輸出入介面及運算能力 Mid-range digital set-top 1048699 具有回傳的管道因此能提供與系統業者在頭端 (head-end) 的伺服器進行溝通此外不論在處 理效能或儲存能力上都比入門級數位 STB還強上 一倍以上

21

STB 設備分類與功能定位 High-range digital set-top box 功能更強幾可比擬多媒體桌上型電腦它的運算能力可

以是低階廣播電視 STB 的十倍以上例如在儲存能力上一般有 32-64Mbyte 的 Flash 記憶容量也有高速的回傳管道來提供多種進階服務此外它的繪圖功能也很強能讓收視戶收看高畫質電視訊號

在高階 STB 的市場上又有多種不同的功能定位例如有些高階設備更提供了個人錄影機 (Personal Video RecorderPVR) 的功能也就是在 STB 中置入硬碟讓 STB 有足夠的儲存容量錄製節目不僅如此新的 IP STB 設備還具有家庭網路的連接埠讓 STB 進一步成為家用閘道器 (Residential Gateway)

22

STB 與 IPTV 接口 STB 與 IPTV 平台接口包含網路層認證與

應用層認證按照目前用戶與網路間的通訊方式分為以下三種

(1) 認證接口 PPPoE 與 DHCP+WEB驗證 (2) 用戶消費接口 依照系統價格提示用戶確認購買系統實現扣費的一個消費流程

(3)服務使用接口 實現用戶從內容營運商獲得不同應用服務的過程

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 12: IPTV STB and QoS/QoE

12

IPTV STB technique requirement

(2) 交互功能要求 STB 需提供內容交互選擇和內容交互控制

兩類交互功能內容交互選擇利用選單選擇內容進行節目檢索與認證系統交互認證訊息內容交互控制主要針對實現點播業務時機頂盒與業務平台間應具有交互控制命令以控制內容訊息功能

13

IPTV STB technique requirement

(3) 管理功能要求 a 軟體升級 透過本地網路或是連至外部網路下

載安裝最新套件以獲取新業務的能力 b 日記功能 針對本機版本訊息及系統訊息的管

理與錯誤訊息的診斷並產生兩份備份文件 c 遠端配置功能 重新啟動下載恢復設定等 d 本地配置功能 遙控器對 STB 訊息配置網入

連接帳號密碼等

14

IPTV STB technique requirement

外部接入要求 - 外部接口基本須包含三類 網路音視訊及紅外線遙

控接口根據需要還可擴展 - 網路接口 包括 10100Base-T xDSL 無線接口 - 音視訊接口 類比數位音訊視訊接口 -紅外線遙控接口 規定紅外線遙控器對機頂盒控制傳輸距離紅外線發射角度和接收最小角度具體性能要求應符合 IrDA11(Infrared Data Association) 協議

-輔助接口 USB

15

IPTV STB technique requirement

通信協議要求 IPTV STB 為網路接入的終端設備必須支援一

系列的業務與 IP 機頂盒標準將所涉及 IP歸納為

接入過程 PPPoE DHCP IEEE8021x

文件傳送 TFTP FTP HTTP

媒體傳送 RTP RTSP

媒體播放 IGMP

16

IPTV STB technique requirement

安全要求 - 安全認證要求 STB 需支持 AAA(Authentication

Authorization and Accounting ) 接入 IP 網路應提供必要的訊息經認證授權後才可使用 IPTV業務

- 數位版權 (DRM) 管理安全要求 供應商送到用戶終端的訊息應具有 DRM 的訊息在 STB 中須有針對業務平台的 DRM 版本提供內容版權的保護

17

IPTV STB 功能結構 因為 IPTV STB 提供三網融合的業務做到 triple

play 可以建立 IP化的家庭環境 目前可支援 IPTV 產品大致分為 Entry-level digita

l set-top box Mid-range digital set-top box High-range digital set-top box

STB 由軟硬體所構成硬體包含 CPU Storage Feedback Channel Conditional Access external device

軟體則有操作解譯與應用三大方面

18

IPTV STB硬體結構

Fig STB 系統架構圖

19

IPTV STB 軟體結構 (1)嵌入式WinCE 終端 優 支援Windows 套件 缺 原始碼不公開 WinCE佔用許多 ROM

RAM (2)嵌入式 Linux 終端 優 原始碼公開技術交流方便維護成本低 缺 解碼器性能需芯片支援 (3)other software Ex VxWorks

20

STB 設備分類與功能定位 Entry-level digital set-top box 接受數位廣播電視為主要功能並具有按次計費 (pay-per-view PPV) 的系統功能與基本的瀏覽工 具這類設備的特色包括低成本以及有限的記 憶容量輸出入介面及運算能力 Mid-range digital set-top 1048699 具有回傳的管道因此能提供與系統業者在頭端 (head-end) 的伺服器進行溝通此外不論在處 理效能或儲存能力上都比入門級數位 STB還強上 一倍以上

21

STB 設備分類與功能定位 High-range digital set-top box 功能更強幾可比擬多媒體桌上型電腦它的運算能力可

以是低階廣播電視 STB 的十倍以上例如在儲存能力上一般有 32-64Mbyte 的 Flash 記憶容量也有高速的回傳管道來提供多種進階服務此外它的繪圖功能也很強能讓收視戶收看高畫質電視訊號

在高階 STB 的市場上又有多種不同的功能定位例如有些高階設備更提供了個人錄影機 (Personal Video RecorderPVR) 的功能也就是在 STB 中置入硬碟讓 STB 有足夠的儲存容量錄製節目不僅如此新的 IP STB 設備還具有家庭網路的連接埠讓 STB 進一步成為家用閘道器 (Residential Gateway)

22

STB 與 IPTV 接口 STB 與 IPTV 平台接口包含網路層認證與

應用層認證按照目前用戶與網路間的通訊方式分為以下三種

(1) 認證接口 PPPoE 與 DHCP+WEB驗證 (2) 用戶消費接口 依照系統價格提示用戶確認購買系統實現扣費的一個消費流程

(3)服務使用接口 實現用戶從內容營運商獲得不同應用服務的過程

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 13: IPTV STB and QoS/QoE

13

IPTV STB technique requirement

(3) 管理功能要求 a 軟體升級 透過本地網路或是連至外部網路下

載安裝最新套件以獲取新業務的能力 b 日記功能 針對本機版本訊息及系統訊息的管

理與錯誤訊息的診斷並產生兩份備份文件 c 遠端配置功能 重新啟動下載恢復設定等 d 本地配置功能 遙控器對 STB 訊息配置網入

連接帳號密碼等

14

IPTV STB technique requirement

外部接入要求 - 外部接口基本須包含三類 網路音視訊及紅外線遙

控接口根據需要還可擴展 - 網路接口 包括 10100Base-T xDSL 無線接口 - 音視訊接口 類比數位音訊視訊接口 -紅外線遙控接口 規定紅外線遙控器對機頂盒控制傳輸距離紅外線發射角度和接收最小角度具體性能要求應符合 IrDA11(Infrared Data Association) 協議

-輔助接口 USB

15

IPTV STB technique requirement

通信協議要求 IPTV STB 為網路接入的終端設備必須支援一

系列的業務與 IP 機頂盒標準將所涉及 IP歸納為

接入過程 PPPoE DHCP IEEE8021x

文件傳送 TFTP FTP HTTP

媒體傳送 RTP RTSP

媒體播放 IGMP

16

IPTV STB technique requirement

安全要求 - 安全認證要求 STB 需支持 AAA(Authentication

Authorization and Accounting ) 接入 IP 網路應提供必要的訊息經認證授權後才可使用 IPTV業務

- 數位版權 (DRM) 管理安全要求 供應商送到用戶終端的訊息應具有 DRM 的訊息在 STB 中須有針對業務平台的 DRM 版本提供內容版權的保護

17

IPTV STB 功能結構 因為 IPTV STB 提供三網融合的業務做到 triple

play 可以建立 IP化的家庭環境 目前可支援 IPTV 產品大致分為 Entry-level digita

l set-top box Mid-range digital set-top box High-range digital set-top box

STB 由軟硬體所構成硬體包含 CPU Storage Feedback Channel Conditional Access external device

軟體則有操作解譯與應用三大方面

18

IPTV STB硬體結構

Fig STB 系統架構圖

19

IPTV STB 軟體結構 (1)嵌入式WinCE 終端 優 支援Windows 套件 缺 原始碼不公開 WinCE佔用許多 ROM

RAM (2)嵌入式 Linux 終端 優 原始碼公開技術交流方便維護成本低 缺 解碼器性能需芯片支援 (3)other software Ex VxWorks

20

STB 設備分類與功能定位 Entry-level digital set-top box 接受數位廣播電視為主要功能並具有按次計費 (pay-per-view PPV) 的系統功能與基本的瀏覽工 具這類設備的特色包括低成本以及有限的記 憶容量輸出入介面及運算能力 Mid-range digital set-top 1048699 具有回傳的管道因此能提供與系統業者在頭端 (head-end) 的伺服器進行溝通此外不論在處 理效能或儲存能力上都比入門級數位 STB還強上 一倍以上

21

STB 設備分類與功能定位 High-range digital set-top box 功能更強幾可比擬多媒體桌上型電腦它的運算能力可

以是低階廣播電視 STB 的十倍以上例如在儲存能力上一般有 32-64Mbyte 的 Flash 記憶容量也有高速的回傳管道來提供多種進階服務此外它的繪圖功能也很強能讓收視戶收看高畫質電視訊號

在高階 STB 的市場上又有多種不同的功能定位例如有些高階設備更提供了個人錄影機 (Personal Video RecorderPVR) 的功能也就是在 STB 中置入硬碟讓 STB 有足夠的儲存容量錄製節目不僅如此新的 IP STB 設備還具有家庭網路的連接埠讓 STB 進一步成為家用閘道器 (Residential Gateway)

22

STB 與 IPTV 接口 STB 與 IPTV 平台接口包含網路層認證與

應用層認證按照目前用戶與網路間的通訊方式分為以下三種

(1) 認證接口 PPPoE 與 DHCP+WEB驗證 (2) 用戶消費接口 依照系統價格提示用戶確認購買系統實現扣費的一個消費流程

(3)服務使用接口 實現用戶從內容營運商獲得不同應用服務的過程

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 14: IPTV STB and QoS/QoE

14

IPTV STB technique requirement

外部接入要求 - 外部接口基本須包含三類 網路音視訊及紅外線遙

控接口根據需要還可擴展 - 網路接口 包括 10100Base-T xDSL 無線接口 - 音視訊接口 類比數位音訊視訊接口 -紅外線遙控接口 規定紅外線遙控器對機頂盒控制傳輸距離紅外線發射角度和接收最小角度具體性能要求應符合 IrDA11(Infrared Data Association) 協議

-輔助接口 USB

15

IPTV STB technique requirement

通信協議要求 IPTV STB 為網路接入的終端設備必須支援一

系列的業務與 IP 機頂盒標準將所涉及 IP歸納為

接入過程 PPPoE DHCP IEEE8021x

文件傳送 TFTP FTP HTTP

媒體傳送 RTP RTSP

媒體播放 IGMP

16

IPTV STB technique requirement

安全要求 - 安全認證要求 STB 需支持 AAA(Authentication

Authorization and Accounting ) 接入 IP 網路應提供必要的訊息經認證授權後才可使用 IPTV業務

- 數位版權 (DRM) 管理安全要求 供應商送到用戶終端的訊息應具有 DRM 的訊息在 STB 中須有針對業務平台的 DRM 版本提供內容版權的保護

17

IPTV STB 功能結構 因為 IPTV STB 提供三網融合的業務做到 triple

play 可以建立 IP化的家庭環境 目前可支援 IPTV 產品大致分為 Entry-level digita

l set-top box Mid-range digital set-top box High-range digital set-top box

STB 由軟硬體所構成硬體包含 CPU Storage Feedback Channel Conditional Access external device

軟體則有操作解譯與應用三大方面

18

IPTV STB硬體結構

Fig STB 系統架構圖

19

IPTV STB 軟體結構 (1)嵌入式WinCE 終端 優 支援Windows 套件 缺 原始碼不公開 WinCE佔用許多 ROM

RAM (2)嵌入式 Linux 終端 優 原始碼公開技術交流方便維護成本低 缺 解碼器性能需芯片支援 (3)other software Ex VxWorks

20

STB 設備分類與功能定位 Entry-level digital set-top box 接受數位廣播電視為主要功能並具有按次計費 (pay-per-view PPV) 的系統功能與基本的瀏覽工 具這類設備的特色包括低成本以及有限的記 憶容量輸出入介面及運算能力 Mid-range digital set-top 1048699 具有回傳的管道因此能提供與系統業者在頭端 (head-end) 的伺服器進行溝通此外不論在處 理效能或儲存能力上都比入門級數位 STB還強上 一倍以上

21

STB 設備分類與功能定位 High-range digital set-top box 功能更強幾可比擬多媒體桌上型電腦它的運算能力可

以是低階廣播電視 STB 的十倍以上例如在儲存能力上一般有 32-64Mbyte 的 Flash 記憶容量也有高速的回傳管道來提供多種進階服務此外它的繪圖功能也很強能讓收視戶收看高畫質電視訊號

在高階 STB 的市場上又有多種不同的功能定位例如有些高階設備更提供了個人錄影機 (Personal Video RecorderPVR) 的功能也就是在 STB 中置入硬碟讓 STB 有足夠的儲存容量錄製節目不僅如此新的 IP STB 設備還具有家庭網路的連接埠讓 STB 進一步成為家用閘道器 (Residential Gateway)

22

STB 與 IPTV 接口 STB 與 IPTV 平台接口包含網路層認證與

應用層認證按照目前用戶與網路間的通訊方式分為以下三種

(1) 認證接口 PPPoE 與 DHCP+WEB驗證 (2) 用戶消費接口 依照系統價格提示用戶確認購買系統實現扣費的一個消費流程

(3)服務使用接口 實現用戶從內容營運商獲得不同應用服務的過程

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 15: IPTV STB and QoS/QoE

15

IPTV STB technique requirement

通信協議要求 IPTV STB 為網路接入的終端設備必須支援一

系列的業務與 IP 機頂盒標準將所涉及 IP歸納為

接入過程 PPPoE DHCP IEEE8021x

文件傳送 TFTP FTP HTTP

媒體傳送 RTP RTSP

媒體播放 IGMP

16

IPTV STB technique requirement

安全要求 - 安全認證要求 STB 需支持 AAA(Authentication

Authorization and Accounting ) 接入 IP 網路應提供必要的訊息經認證授權後才可使用 IPTV業務

- 數位版權 (DRM) 管理安全要求 供應商送到用戶終端的訊息應具有 DRM 的訊息在 STB 中須有針對業務平台的 DRM 版本提供內容版權的保護

17

IPTV STB 功能結構 因為 IPTV STB 提供三網融合的業務做到 triple

play 可以建立 IP化的家庭環境 目前可支援 IPTV 產品大致分為 Entry-level digita

l set-top box Mid-range digital set-top box High-range digital set-top box

STB 由軟硬體所構成硬體包含 CPU Storage Feedback Channel Conditional Access external device

軟體則有操作解譯與應用三大方面

18

IPTV STB硬體結構

Fig STB 系統架構圖

19

IPTV STB 軟體結構 (1)嵌入式WinCE 終端 優 支援Windows 套件 缺 原始碼不公開 WinCE佔用許多 ROM

RAM (2)嵌入式 Linux 終端 優 原始碼公開技術交流方便維護成本低 缺 解碼器性能需芯片支援 (3)other software Ex VxWorks

20

STB 設備分類與功能定位 Entry-level digital set-top box 接受數位廣播電視為主要功能並具有按次計費 (pay-per-view PPV) 的系統功能與基本的瀏覽工 具這類設備的特色包括低成本以及有限的記 憶容量輸出入介面及運算能力 Mid-range digital set-top 1048699 具有回傳的管道因此能提供與系統業者在頭端 (head-end) 的伺服器進行溝通此外不論在處 理效能或儲存能力上都比入門級數位 STB還強上 一倍以上

21

STB 設備分類與功能定位 High-range digital set-top box 功能更強幾可比擬多媒體桌上型電腦它的運算能力可

以是低階廣播電視 STB 的十倍以上例如在儲存能力上一般有 32-64Mbyte 的 Flash 記憶容量也有高速的回傳管道來提供多種進階服務此外它的繪圖功能也很強能讓收視戶收看高畫質電視訊號

在高階 STB 的市場上又有多種不同的功能定位例如有些高階設備更提供了個人錄影機 (Personal Video RecorderPVR) 的功能也就是在 STB 中置入硬碟讓 STB 有足夠的儲存容量錄製節目不僅如此新的 IP STB 設備還具有家庭網路的連接埠讓 STB 進一步成為家用閘道器 (Residential Gateway)

22

STB 與 IPTV 接口 STB 與 IPTV 平台接口包含網路層認證與

應用層認證按照目前用戶與網路間的通訊方式分為以下三種

(1) 認證接口 PPPoE 與 DHCP+WEB驗證 (2) 用戶消費接口 依照系統價格提示用戶確認購買系統實現扣費的一個消費流程

(3)服務使用接口 實現用戶從內容營運商獲得不同應用服務的過程

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 16: IPTV STB and QoS/QoE

16

IPTV STB technique requirement

安全要求 - 安全認證要求 STB 需支持 AAA(Authentication

Authorization and Accounting ) 接入 IP 網路應提供必要的訊息經認證授權後才可使用 IPTV業務

- 數位版權 (DRM) 管理安全要求 供應商送到用戶終端的訊息應具有 DRM 的訊息在 STB 中須有針對業務平台的 DRM 版本提供內容版權的保護

17

IPTV STB 功能結構 因為 IPTV STB 提供三網融合的業務做到 triple

play 可以建立 IP化的家庭環境 目前可支援 IPTV 產品大致分為 Entry-level digita

l set-top box Mid-range digital set-top box High-range digital set-top box

STB 由軟硬體所構成硬體包含 CPU Storage Feedback Channel Conditional Access external device

軟體則有操作解譯與應用三大方面

18

IPTV STB硬體結構

Fig STB 系統架構圖

19

IPTV STB 軟體結構 (1)嵌入式WinCE 終端 優 支援Windows 套件 缺 原始碼不公開 WinCE佔用許多 ROM

RAM (2)嵌入式 Linux 終端 優 原始碼公開技術交流方便維護成本低 缺 解碼器性能需芯片支援 (3)other software Ex VxWorks

20

STB 設備分類與功能定位 Entry-level digital set-top box 接受數位廣播電視為主要功能並具有按次計費 (pay-per-view PPV) 的系統功能與基本的瀏覽工 具這類設備的特色包括低成本以及有限的記 憶容量輸出入介面及運算能力 Mid-range digital set-top 1048699 具有回傳的管道因此能提供與系統業者在頭端 (head-end) 的伺服器進行溝通此外不論在處 理效能或儲存能力上都比入門級數位 STB還強上 一倍以上

21

STB 設備分類與功能定位 High-range digital set-top box 功能更強幾可比擬多媒體桌上型電腦它的運算能力可

以是低階廣播電視 STB 的十倍以上例如在儲存能力上一般有 32-64Mbyte 的 Flash 記憶容量也有高速的回傳管道來提供多種進階服務此外它的繪圖功能也很強能讓收視戶收看高畫質電視訊號

在高階 STB 的市場上又有多種不同的功能定位例如有些高階設備更提供了個人錄影機 (Personal Video RecorderPVR) 的功能也就是在 STB 中置入硬碟讓 STB 有足夠的儲存容量錄製節目不僅如此新的 IP STB 設備還具有家庭網路的連接埠讓 STB 進一步成為家用閘道器 (Residential Gateway)

22

STB 與 IPTV 接口 STB 與 IPTV 平台接口包含網路層認證與

應用層認證按照目前用戶與網路間的通訊方式分為以下三種

(1) 認證接口 PPPoE 與 DHCP+WEB驗證 (2) 用戶消費接口 依照系統價格提示用戶確認購買系統實現扣費的一個消費流程

(3)服務使用接口 實現用戶從內容營運商獲得不同應用服務的過程

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 17: IPTV STB and QoS/QoE

17

IPTV STB 功能結構 因為 IPTV STB 提供三網融合的業務做到 triple

play 可以建立 IP化的家庭環境 目前可支援 IPTV 產品大致分為 Entry-level digita

l set-top box Mid-range digital set-top box High-range digital set-top box

STB 由軟硬體所構成硬體包含 CPU Storage Feedback Channel Conditional Access external device

軟體則有操作解譯與應用三大方面

18

IPTV STB硬體結構

Fig STB 系統架構圖

19

IPTV STB 軟體結構 (1)嵌入式WinCE 終端 優 支援Windows 套件 缺 原始碼不公開 WinCE佔用許多 ROM

RAM (2)嵌入式 Linux 終端 優 原始碼公開技術交流方便維護成本低 缺 解碼器性能需芯片支援 (3)other software Ex VxWorks

20

STB 設備分類與功能定位 Entry-level digital set-top box 接受數位廣播電視為主要功能並具有按次計費 (pay-per-view PPV) 的系統功能與基本的瀏覽工 具這類設備的特色包括低成本以及有限的記 憶容量輸出入介面及運算能力 Mid-range digital set-top 1048699 具有回傳的管道因此能提供與系統業者在頭端 (head-end) 的伺服器進行溝通此外不論在處 理效能或儲存能力上都比入門級數位 STB還強上 一倍以上

21

STB 設備分類與功能定位 High-range digital set-top box 功能更強幾可比擬多媒體桌上型電腦它的運算能力可

以是低階廣播電視 STB 的十倍以上例如在儲存能力上一般有 32-64Mbyte 的 Flash 記憶容量也有高速的回傳管道來提供多種進階服務此外它的繪圖功能也很強能讓收視戶收看高畫質電視訊號

在高階 STB 的市場上又有多種不同的功能定位例如有些高階設備更提供了個人錄影機 (Personal Video RecorderPVR) 的功能也就是在 STB 中置入硬碟讓 STB 有足夠的儲存容量錄製節目不僅如此新的 IP STB 設備還具有家庭網路的連接埠讓 STB 進一步成為家用閘道器 (Residential Gateway)

22

STB 與 IPTV 接口 STB 與 IPTV 平台接口包含網路層認證與

應用層認證按照目前用戶與網路間的通訊方式分為以下三種

(1) 認證接口 PPPoE 與 DHCP+WEB驗證 (2) 用戶消費接口 依照系統價格提示用戶確認購買系統實現扣費的一個消費流程

(3)服務使用接口 實現用戶從內容營運商獲得不同應用服務的過程

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 18: IPTV STB and QoS/QoE

18

IPTV STB硬體結構

Fig STB 系統架構圖

19

IPTV STB 軟體結構 (1)嵌入式WinCE 終端 優 支援Windows 套件 缺 原始碼不公開 WinCE佔用許多 ROM

RAM (2)嵌入式 Linux 終端 優 原始碼公開技術交流方便維護成本低 缺 解碼器性能需芯片支援 (3)other software Ex VxWorks

20

STB 設備分類與功能定位 Entry-level digital set-top box 接受數位廣播電視為主要功能並具有按次計費 (pay-per-view PPV) 的系統功能與基本的瀏覽工 具這類設備的特色包括低成本以及有限的記 憶容量輸出入介面及運算能力 Mid-range digital set-top 1048699 具有回傳的管道因此能提供與系統業者在頭端 (head-end) 的伺服器進行溝通此外不論在處 理效能或儲存能力上都比入門級數位 STB還強上 一倍以上

21

STB 設備分類與功能定位 High-range digital set-top box 功能更強幾可比擬多媒體桌上型電腦它的運算能力可

以是低階廣播電視 STB 的十倍以上例如在儲存能力上一般有 32-64Mbyte 的 Flash 記憶容量也有高速的回傳管道來提供多種進階服務此外它的繪圖功能也很強能讓收視戶收看高畫質電視訊號

在高階 STB 的市場上又有多種不同的功能定位例如有些高階設備更提供了個人錄影機 (Personal Video RecorderPVR) 的功能也就是在 STB 中置入硬碟讓 STB 有足夠的儲存容量錄製節目不僅如此新的 IP STB 設備還具有家庭網路的連接埠讓 STB 進一步成為家用閘道器 (Residential Gateway)

22

STB 與 IPTV 接口 STB 與 IPTV 平台接口包含網路層認證與

應用層認證按照目前用戶與網路間的通訊方式分為以下三種

(1) 認證接口 PPPoE 與 DHCP+WEB驗證 (2) 用戶消費接口 依照系統價格提示用戶確認購買系統實現扣費的一個消費流程

(3)服務使用接口 實現用戶從內容營運商獲得不同應用服務的過程

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 19: IPTV STB and QoS/QoE

19

IPTV STB 軟體結構 (1)嵌入式WinCE 終端 優 支援Windows 套件 缺 原始碼不公開 WinCE佔用許多 ROM

RAM (2)嵌入式 Linux 終端 優 原始碼公開技術交流方便維護成本低 缺 解碼器性能需芯片支援 (3)other software Ex VxWorks

20

STB 設備分類與功能定位 Entry-level digital set-top box 接受數位廣播電視為主要功能並具有按次計費 (pay-per-view PPV) 的系統功能與基本的瀏覽工 具這類設備的特色包括低成本以及有限的記 憶容量輸出入介面及運算能力 Mid-range digital set-top 1048699 具有回傳的管道因此能提供與系統業者在頭端 (head-end) 的伺服器進行溝通此外不論在處 理效能或儲存能力上都比入門級數位 STB還強上 一倍以上

21

STB 設備分類與功能定位 High-range digital set-top box 功能更強幾可比擬多媒體桌上型電腦它的運算能力可

以是低階廣播電視 STB 的十倍以上例如在儲存能力上一般有 32-64Mbyte 的 Flash 記憶容量也有高速的回傳管道來提供多種進階服務此外它的繪圖功能也很強能讓收視戶收看高畫質電視訊號

在高階 STB 的市場上又有多種不同的功能定位例如有些高階設備更提供了個人錄影機 (Personal Video RecorderPVR) 的功能也就是在 STB 中置入硬碟讓 STB 有足夠的儲存容量錄製節目不僅如此新的 IP STB 設備還具有家庭網路的連接埠讓 STB 進一步成為家用閘道器 (Residential Gateway)

22

STB 與 IPTV 接口 STB 與 IPTV 平台接口包含網路層認證與

應用層認證按照目前用戶與網路間的通訊方式分為以下三種

(1) 認證接口 PPPoE 與 DHCP+WEB驗證 (2) 用戶消費接口 依照系統價格提示用戶確認購買系統實現扣費的一個消費流程

(3)服務使用接口 實現用戶從內容營運商獲得不同應用服務的過程

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 20: IPTV STB and QoS/QoE

20

STB 設備分類與功能定位 Entry-level digital set-top box 接受數位廣播電視為主要功能並具有按次計費 (pay-per-view PPV) 的系統功能與基本的瀏覽工 具這類設備的特色包括低成本以及有限的記 憶容量輸出入介面及運算能力 Mid-range digital set-top 1048699 具有回傳的管道因此能提供與系統業者在頭端 (head-end) 的伺服器進行溝通此外不論在處 理效能或儲存能力上都比入門級數位 STB還強上 一倍以上

21

STB 設備分類與功能定位 High-range digital set-top box 功能更強幾可比擬多媒體桌上型電腦它的運算能力可

以是低階廣播電視 STB 的十倍以上例如在儲存能力上一般有 32-64Mbyte 的 Flash 記憶容量也有高速的回傳管道來提供多種進階服務此外它的繪圖功能也很強能讓收視戶收看高畫質電視訊號

在高階 STB 的市場上又有多種不同的功能定位例如有些高階設備更提供了個人錄影機 (Personal Video RecorderPVR) 的功能也就是在 STB 中置入硬碟讓 STB 有足夠的儲存容量錄製節目不僅如此新的 IP STB 設備還具有家庭網路的連接埠讓 STB 進一步成為家用閘道器 (Residential Gateway)

22

STB 與 IPTV 接口 STB 與 IPTV 平台接口包含網路層認證與

應用層認證按照目前用戶與網路間的通訊方式分為以下三種

(1) 認證接口 PPPoE 與 DHCP+WEB驗證 (2) 用戶消費接口 依照系統價格提示用戶確認購買系統實現扣費的一個消費流程

(3)服務使用接口 實現用戶從內容營運商獲得不同應用服務的過程

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 21: IPTV STB and QoS/QoE

21

STB 設備分類與功能定位 High-range digital set-top box 功能更強幾可比擬多媒體桌上型電腦它的運算能力可

以是低階廣播電視 STB 的十倍以上例如在儲存能力上一般有 32-64Mbyte 的 Flash 記憶容量也有高速的回傳管道來提供多種進階服務此外它的繪圖功能也很強能讓收視戶收看高畫質電視訊號

在高階 STB 的市場上又有多種不同的功能定位例如有些高階設備更提供了個人錄影機 (Personal Video RecorderPVR) 的功能也就是在 STB 中置入硬碟讓 STB 有足夠的儲存容量錄製節目不僅如此新的 IP STB 設備還具有家庭網路的連接埠讓 STB 進一步成為家用閘道器 (Residential Gateway)

22

STB 與 IPTV 接口 STB 與 IPTV 平台接口包含網路層認證與

應用層認證按照目前用戶與網路間的通訊方式分為以下三種

(1) 認證接口 PPPoE 與 DHCP+WEB驗證 (2) 用戶消費接口 依照系統價格提示用戶確認購買系統實現扣費的一個消費流程

(3)服務使用接口 實現用戶從內容營運商獲得不同應用服務的過程

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 22: IPTV STB and QoS/QoE

22

STB 與 IPTV 接口 STB 與 IPTV 平台接口包含網路層認證與

應用層認證按照目前用戶與網路間的通訊方式分為以下三種

(1) 認證接口 PPPoE 與 DHCP+WEB驗證 (2) 用戶消費接口 依照系統價格提示用戶確認購買系統實現扣費的一個消費流程

(3)服務使用接口 實現用戶從內容營運商獲得不同應用服務的過程

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 23: IPTV STB and QoS/QoE

23

DVB-IPTV Functional model

23

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED Home Network End Device

DNG Delivery Network Gateway

SDampS Service Discovery and Selection

BCG Broadband Content Guide

CoD Content on DemandCDS Content Download Servi

ce- - - indicates optional entity

Focus of DVB-IPTVspecification

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 24: IPTV STB and QoS/QoE

24

DVB-IPTV Service Provider Discovery

24

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

HNED contacts SDampS entry point(s) for service provider information

Entry point lookup (in order)bullDNS service location lookup for _dvbservds

c_tcpudpltdomain namegtbullWell known address 22402314 (DVBServDi

sc)bullDNS service location lookup for _dvbservds

c_tcpudpservicesdvborgbullManual entry of URL

SDampS server provides Service Provider Discovery record(s)

bullService provider namebullDescriptionbullDomain NamebullOfferings

bullAddress (push andor pull)bullType of information

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 25: IPTV STB and QoS/QoE

25

DVB-IPTV Service Discovery

25

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

SDampS info delivered either in multicast (DVBSTP) or in unicast (HTTP)

Id of a Service Providerbull Domain name

Id of a live servicebull DVB triplet and bull Textual service identifier

ID of a Broadband Content Guide

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 26: IPTV STB and QoS/QoE

26

DVB-IPTV Service selection and consumption for streaming

26

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullUnicast RTSPbullMulticast IGMPv3(+ optional

RTSP) ASM and SSM supported

StreamingbullRTPRTCP (+ optional AL-FEC

or RET)bullUDP

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 27: IPTV STB and QoS/QoE

27

DVB-IPTV Service selection and consumption for download

27

Delivery Network(Access amp Core)

HomeNetwork HNEDDNG

DHCPDHCP

Firmware UpdateRemote Management

SDampS serverService provider inf

Content Providers

IPI-3

IPI-4 NATTimeserver

DNS

IPI-1

CDS

Service selectionbullDownload Session Descriptio

nsbullUnicast httpbullMulticast IGMPv3

DownloadbullMulticast FLUTE (+ optional F

EC)bullUnicast httpbullFile Repair procedures

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 28: IPTV STB and QoS/QoE

28

QoSQoE

Quality of service is the ability to provide different priority to different applications users or data flows or to guarantee a certain level of performance to a data flow

IPTV streaming technology considers the possible service transfer from wire to wirelessfrom wireless to wire that is in place to ensure quality of servicequality of experience (QoSQoE)

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 29: IPTV STB and QoS/QoE

29

Factors that affect the iptv

Network delay Delay manifests itself in a number of ways

including the time taken to establish a particular service from the initial user request and the time to receive specific information once the service is established Delay has a very direct impact on user satisfaction depending on the application and includes delays in the terminal network and any servers

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 30: IPTV STB and QoS/QoE

30

Factors that affect the iptv Network delay variation (Jitter) Delay variation is generally included as a

performance parameter since it is very important at the transport layer in packetized data systems due to the inherent variability in arrival times of individual packets

Services that are highly intolerant of delay variation will usually take steps to remove (or at least significantly reduce) the delay variation by means of buffering effectively eliminating delay variation as perceived at the user level

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 31: IPTV STB and QoS/QoE

31

Factors that affect the iptv

Packet Loss Packet loss has a very direct effect on

the quality of service finally presented to the user whether it be voice image video or data

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 32: IPTV STB and QoS/QoE

32

QoE(Quality of Experience )

QoE is the term which is used to describe how it is satisfied by subscribers to the provided service quality The poor QoE will cause dissatisfied subscribers and fall behind in contestants due to the ultimately bad market competitive power to contestants

QoE is composed of not only the network performance parameter but also the service quality parameter such as cost reliability availability usability and fidelity

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 33: IPTV STB and QoS/QoE

33

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 34: IPTV STB and QoS/QoE

34

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 35: IPTV STB and QoS/QoE

35

QoE scale

Fig Example alternative qualitative scales that may be derived from data collected on a quantitative scale

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 36: IPTV STB and QoS/QoE

36

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

IPTV providers need a method to control QoE when QoE is not satisfied by subscribers

Network providers can evaluate subscribers QoE using QoS parameters weight and some analyzed values which is from the proposed model and control QoE as deduce QoS parameters(delay loss jitter etc) associated with QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 37: IPTV STB and QoS/QoE

37

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Fig QoSQoE Correlation Model for IPTV

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 38: IPTV STB and QoS/QoE

38

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

K means the whole QoS quality determinant which is selected according to the type of the access network for the IPTV service

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 39: IPTV STB and QoS/QoE

39

QOSQOE CORRELATION MODEL FOR IPTV QOE EVALUATION

Qr a coefficient limiting the range of the IPTV image QoE according to the display size andor resolution of the terminal

A expresses the subscribed service class

R determined as the constant reflecting the structure of the video frames according to the GoP(Group of Picture) length

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 40: IPTV STB and QoS/QoE

40

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 1 MPEG-4 HDTV service

bull Packet Loss = 278E-06 (W1=8E+04)

bull Burst Level = 167ms (Wu=lO)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=20E-1O)

bull GoP Length = 12 Qr = 5

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 41: IPTV STB and QoS/QoE

41

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Case 2 MPEG-4 SDTV service

bull Packet Loss = 278E-06 (Wl=15E+04)

bull Burst Level = 167ms (Wu=20)

bull Packet Jitter = 37ms (Wj=O)

bull Packet Delay = 105ms (Wd=05)

bull Bandwidth = 8Mbps (Wb=O)

bull GoP Length = 12 Qr = 45

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 42: IPTV STB and QoS/QoE

42

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In HDTV Class

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 43: IPTV STB and QoS/QoE

43

EXAMPLE OF THE IPTV VIDEO QOE EVALUATION USING THE QOSQOE CORRELATION MODEL

Fig QoS Parameter Weights of IPTV Service In SDTV Class

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 44: IPTV STB and QoS/QoE

44

Result HDTV

QoS(X) = 027817 QoEv = 294617

Fig Case_1 HDTV Class

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 45: IPTV STB and QoS/QoE

45

Result SDTV QoS(X) = 009754 QoEv = 424475

Fig Case_2 SDTV Class

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 46: IPTV STB and QoS/QoE

46

Conclusion

Network providers can predict subscribers QoE in provided network environment and analogize service environment which meet the optimum QoE on the contrary

Network operator can prevent the unnecessary investment for the enlargement maintenance and repair of the network

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 47: IPTV STB and QoS/QoE

47

Reference

[1] 李偉 等 IPTV 關鍵技術與應用 2007 7 [2] H L Kim S G Choi ldquoA Study on a QoSQoE Correlatio

n Model for QoE Evaluation on IPTV Servicerdquo Feb 2010 [3] ITU-T P800 Mean Opinion Score (MOS) terminology

Mar 2003 [4] ITU-T P861 Objective quality measurement of telephon

e-band (3003400Hz) speech codec Feb 1998 [5] ITU-T P910 Subjective video quality assessment meth

ods for multimedia applications Sep 1999 [6] ITU-T Recommendation Y1541 Network performance

objectives for IP-based service Feb 2006

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory

Page 48: IPTV STB and QoS/QoE

48

Figure IPTV coverage圖片來源 NTT Cyber Solutions Laboratory