One-Seg & Mobile broadcasting

DOCUMENT #: GSC13-GRSC6-16r1

FOR: Presentation

SOURCE: ARIB (NHK)

AGENDA ITEM: GRSC-6 4.3 (Mobile Multimedia)

CONTACT(S): fujita.m-ke@nhk.or.jp

Masami Fujita

Japan Broadcasting Corporation (NHK)

Submission Date: July 8, 2008

2

• Digital Terrestrial TV service in Japan– On December 1, 2003, Japan launched digital terrestrial television

broadcasting (DTTB) using the Integrated Service Digital Broadcasting - Terrestrial (ISDB-T) transmission system.

– ISDB-T is recommended in Rec. ITU-R BT.1306. – ISDB-T is robust transmission system because it uses OFDM and

time interleaving.

• One-Seg– One-segment services for handheld receivers (called “One-Seg”) can

be provided simultaneously with one 6MHz TV channel, in addition to HDTV (or multi-channel SDTV).

– On April 1, 2006, One-Seg services began in Japan.– More than 30 million One-Seg receivers have been shipped so far.– Various kinds of One-Seg receivers are available on the market.– One-Seg is provided free of charge.

Highlight of Current Activities (1)

to slide 8,9

3

Highlight of Current Activities (2)

• BST-OFDM technology– NHK developed the Band Segmented Transmission OFDM (BST-

OFDM) technology for ISDB-T in 1996.– ISDB-T consists of 13 OFDM segments.– The system supports hierarchical transmissions of up to three layers,

and parameters can be changed in each layers.– Typically we use two layers. One is a layer for HDTV with 12

segments using 64QAM, and the other is a layer for One-Seg with 1 segment using QPSK.

– Example of Information bit rate is 16.85Mbps (for HDTV) and 416kbps (for One-Seg).

• Features of One-Seg– Not only video & audio, but data, closed caption, and Electric

Program Guide are transmitted in One-Seg.– One-Seg is a new medium that realizes the convergence of

broadcasting & communications on the mobile terminal.to slide 10,11

4

Strategic Direction

• Termination of Analog TV services– Plans call for digital terrestrial broadcasting to reach all homes in Japan

by July 2011.– By July 2011, both analog terrestrial and satellite broadcasting are

scheduled to be terminated. – At this point, Japan will have completed the transition to all-digital TV

broadcasting.

• Digital Radio– Digital terrestrial radio (DR) test transmission started in October 2003.– Programs are transmitted by the Digital Radio Promotion Association

(DRP), a licensed broadcasting corporation run jointly by NHK, several commercial radio stations, etc.

– DR uses a vacant VHF TV channel (CH-7) for the test transmission.– ISDB-TSB (Sound Broadcasting) transmission system is adopted for DR.

to slide 12,13

5

Challenges

• Recent topics in One-Seg– Independent program service

It is possible to broadcast independent program service in One-Seg (non-simultaneous program to 12 segments) from April 2008

by legal changes.NTV started to broadcast independent One-Seg test service for sports programs.NHK announced the start of independent One-Seg service using

educational channel from April 2009.– Multi-channel service in One-Seg

It is possible to send up to 3 programs in One-Seg.TOKYO MX started 2 programs One-Seg service when they broadcast multi-channel service from June 2008.

• Research & Development in One-Seg– NHK have been developing Connected One-Seg Re-transmission

System.– NHK have been developing Automatic Activation of One-Seg

Receivers by emergency warning broadcast system. (See slide 20,21)

6

Next Steps/Actions

• VHF/UHF rearrangement after analog TV termination– Frequency bandwidth for terrestrial television will be reduced from 370MHz to

240MHz.– VHF Low (18MHz) & VHF High (14.5MHz) will be allocated for non-TV

broadcasting services. (e.g., Multimedia broadcasting for mobile receivers)

• Multimedia broadcasting for mobile receivers– There’s a chance to start new multimedia broadcasting services for mobile

receivers with VHF Low & VHF High. – ISDB-TSB, ISDB-Tmm (Mobile Multimedia), etc are now under consideration for

new services.– One-Seg, ISDB-TSB, and ISDB-Tmm are all ISDB-T family that introduce the

BST-OFDM technology. (See slide 22)

– VHF Low would be assigned for local services, and VHF High would be assigned for national services according to the report about the multimedia broadcasting.

– The report said it is necessary to fix the industries that will provide new services by the middle of 2010 to start broadcasting after July 2011.

– ARIB is now preparing for the new download services for multimedia broadcasting.

to slide 14

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Supplemental Slides

8

Number of receivers- Digital Terrestrial TV service in Japan / One-Seg -

0

5

10

15

20

25

30

35

40

1/20

04

4/20

04

7/20

04

10/2

004

1/20

05

4/20

05

7/20

05

10/2

005

1/20

06

4/20

06

7/20

06

10/2

006

1/20

07

4/20

07

7/20

07

10/2

007

1/20

08

4/20

08

Num

ber

of r

ecei

vers

(cu

mul

ativ

e to

tal)

Digital terrestrial *1

One-Seg *2

million

Digital terrestrial broadcasting12/2003

4/2006One-Seg service

*1 Digital television + Terrestrial digital tuner + Cable digital STB ( Total number of Television: about 115 million, 7/2007 )

Number of receivers of Digital terrestrial broadcasting & Mobile phone with One-Seg tuner

*2 Mobile phone with One-Seg tuner ( Total number of Mobile phone: 103 million, 4/2008 )

Japan Electronics and Information Technology Industries Association, etc

More than 30,000 million

One-seg receivers

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One-Seg receivers- Digital Terrestrial TV service in Japan / One-Seg -

Mobile Phones

Portable Games

PCs with One-Seg

Car Navigators

Portable Dictionary

Portable PlayersUSB type One-Seg tuners

(From Homepage)

to slide 3

10

13 Segments , Channel Bandwidth : 5.57MHz

On-air program

Data service

12 Segments

1 Segment

HDTV

64QAMFEC = 3/4

(16.851Mbps)

12 Segs 1 Seg

QPSKFEC = 2/3 (416kbps)

(6/14 MHz)

12 Segments & 1 Segment (ISDB-T) - BST-OFDM technology / Features of One-Seg -

11

Watching TV program and reading data on TV

Watch TV InternetTV & InternetTV & Data

ＢＭＬ

Broadcasting station

ＢＭＬ

Watching TV program on full screen

Watching TV program and reading data on the

Internet

Viewing or reading on the Internet

Broadcasting station

Broadcasting CommunicationsConvergence

to slide 4

ＢＭＬ , HTML

Convergence of Broadcasting & Communications

- BST-OFDM technology / Features of One-Seg -

12

Ter

rest

rial

2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 20122011

Sat

ellit

e

Analog SD

Digital12/2003

4/2006One-Seg

Analog SD

Analog HDwas over10/2007

12/2000Digital

Digital Radio 10/2003Test transmission

24/7/2011

will be over7/2011

will be over7/2011

Timeline of Digital Broadcasting services- Termination of Analog TV services / Digital Radio -

13

ISDB-TSB (Digital Radio)- Termination of Analog TV services / Digital Radio -

13 Segments , Channel Bandwidth : 5.57MHz

ハイビジョン Video ※

Data service

1 Segment

1 Seg

QPSKFEC = 1/2 (330kbps)

TS1 TS2 TS3 TS4 TS5 TS6 TS7 TS8 TS9 TS10 TS11 TS12 TS13

3 Segments

TS1 TS2

Image

※ NHK will start video services from July 2008

ISDB-TSB

(Sound Broadcasting)

1 & 3 Segments are used in ISDB-TSB

Digital Radio test transmission

started from 10/2003(8 segments, VHF 7ch)

to slide 5

14

Rearrangement of VHF/UHF- VHF/UHF rearrangement after analog TV termination -

Analog TVBroadcasting

90-108MHz1 ～ 3ch

170-222MHz4 ～ 12ch

470-770MHz13 ～ 62ch

18MHz 52MHz 300MHz

18MHz 32.5MHz 240MHz14.5MHz 10MHz 40MHz

GB 5MHz GB 5MHz

470-710MHz13 ～ 52ch 730-770MHz715-725MHz90-108MHz 170-202.5MHz207.5-222MHz

（ GB 5MHz ）

Now Analog TVBroadcasting

Analog TV BroadcastingDigital TV Broadcasting

FuturePlan

Digital TV Broadcasting(1) (2) (1) (3) (4)

(1) Non TV Broadcasting => e.g., Multimedia broadcasting for mobile receivers (2) Private Telecommunication (Protection against disasters, etc)(3) Intelligent Transport Systems (4) Telecommunications

Schedule plan(1) (2) after July 25, 2011(3) (4) after July 25, 2012

(VHF Low) (VHF High)

to slide 6

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Chipset of One-Seg receiver- One-Seg -

SHARP documents

Example of One-Seg receiver’s Chipset

Dimensions 9mm×9mm×1.4mm Sensitivity -109.6dBm ～ -105.2dBm Power consumption 77mW ～ 105mW

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12 Segments 1 segment

Reception Fixed (Mobile) Mobile

Modulation 64QAM QPSK

Code ratio 3/4 2/3

Guard interval 1/8 (126 s) 1/8 (126 s)

Bit rate 16.851Mbps 416kbps 1※

Video coding MPEG-2 (30fps) H.264 (15fps)16:9(320×180), 4:3(320×240)

Audio coding MPEG-2 AAC MPEG-2 AAC+SBR 2※

Data broadcasting BML (XHTML) A Profile BML (XHTML) C Profile

Electric Program GuideOK

(Now + Next + 8days)OK

(Now + Next + 8programs)

Closed caption OK OK

Copy control Yes Yes

CAS Yes No

Example parameters for digital terrestrial television broadcasting

※2 Spectral Band Replication

※1 Example: Video (224kbps), Audio (55kbps), Data (80kbps), Closed caption (5kbps), EPG (20kbps), Control (32kbps)

12 Segments & 1 Segment (ISDB-T) - BST-OFDM technology -

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Video coding

Audio coding

Data/ EPG coding

Video

Audio

Data/EPG

12 segs

Video coding

Audio coding

Data/ EPG coding

Video

Audio

Data/EPG

1 seg

Mul

tiple

xing

Con

ditio

nal A

cces

s

Source coding

TS

Re-

Mux

Out

er c

ode

(RS

)

Hie

rarc

hica

l sep

arat

ion

Ene

rgy

disp

ers

al

Del

ay c

ompe

nsat

ion

Byt

e in

terle

ave

Inn

er c

od

e

Bit

inte

rle

ave

Ma

pp

ing

Ene

rgy

disp

ers

al

Byt

e in

terle

ave

Inn

er c

od

e

Bit

inte

rle

ave

Ma

pp

ing

Del

ay c

ompe

nsat

ion

12 segs

1 seg

Laye

r sy

nthe

sis

& r

ate

conv

ersi

on

Tim

e in

terle

ave

Fre

quen

cy in

terle

ave

IFF

T

Gua

rd in

terv

al a

dditi

on

D/A

Up

conv

erte

r

Pow

er A

mp

Ant

enna

OF

DM

fram

e co

nfig

urat

ion

Pilot

TMCC

Aux channel

Channel coding

1 seg

12 segs

Source coding

Configuration of Digital transmission - BST-OFDM technology -

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Digital Radio- Digital Radio -

Tokyo area

DRP homepage

Osaka area

Digital Terrestrial Radio test transmission started in October 2003, using a vacant VHF TV channel (CH-7). Programs are transmitted by the Digital Radio Promotion Association (DRP), a licensed broadcasting corporation run jointly by NHK, several commercial radio stations in Tokyo and Osaka, and some new entrants into the digital radio market.

2.4kW 240W

Digital Radio receiver (KDDI)(About 1.8 million receivers, 6/2008)

19

TOKYO MX homepage

One-Seg 1 One-Seg 2

Multi-channel service in One-Seg- Recent topics in One-Seg -

20

Connected One-Seg Re-transmission System- Research & Development in One-Seg -

ch1

Connected One-Seg re-transmission system

Combines only One-Seg signals

ch9 ch10 ch11 ch12 ch13ch8ch4 ch6ch1 ch3 ch5

6MHz

ch7

Air

Re-transmission

Frequency

aboveground

underground

ch2

・ NHK developed a "connected One-Seg re-transmission system" that extracts One-Seg signals from the digital terrestrial broadcast-waves received from individual broadcasters and combines them into a single signal for re-transmission over a channel that is different from any of the receiving channels. ・ A maximum of thirteen One-Seg signals can be re-transmitted. It will be possible to offer community broadcasting localized to a particular area for re-transmission, in addition to One-Seg services from every broadcaster.

ch2 ch3 ch4 ch5 ch7 ch8ISDB-T

Community One-Seg signals

ch6

ch9-13

Frequency

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Automatic Activation of One-Seg Receivers by EWS- Research & Development in One-Seg -

・ Among the 432 carriers used for One-Seg service, four carriers transmit the activation flag for emergency warning broadcasting. Increasing this to all four carriers, from the previously used two carriers that transmitted the activation flag signal, improved reception sensitivity without increasing power consumption. ・ NHK will work toward the actual implementation of One-Seg and radio receiver with the EWS reception function.

・ The EWS (Emergency Warning broadcast System) automatically activates receivers when a disaster happens, such as an earthquake or Tsunami.・ NHK developed EWS compatible adaptor that can be connected to a One-Seg receiver.・ The low power consumption achieved by performing intermittent reception of the One-Seg activation flag, which is transmitted approximately every 0.2 seconds, showed the prospect of continuous standby operation for about two weeks without recharging.

Prototype of EWS adaptor

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ISDB-Tmm - Multimedia broadcasting for mobile receivers -

・ ISDB-Tmm (Mobile Multimedia) is new multimedia broadcast method that is based on the ISDB-T international standard. ・ The features of ISDB-Tmm is flexible structure of segments.・ It is possible to download the contents through the air.・ MMBP (MultiMedia Broadcasting Planning LLC) was created in December 2006 for the 　 purpose of surveying and researching new mobile multimedia broadcast technologies and business models. MMBP started field testing of ISDB-Tmm in March 2008 using the Tokyo Tower.

Impress AV Watch

Demonstration of ISDB-TmmISDB-T, ISDB-TSB, ISDB-Tmm

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Transmission Parameter Mode 1 Mode 2 Mode 3

No. of OFDM segments 13

Bandwidth 5.575 MHz 5.573 MHz 5.572 MHz

Carrier interval 3.968 kHz 1.984 kHz 0.992 kHz

No. of carriers 1405 2809 5617

Modulation system QPSK ， 16QAM ， 64QAM ， DQPSK

Effective symbol length 252 s 504 s 1.008 ms

Guard-interval length 1/4, 1/8, 1/16, 1/32 of effective symbol length

No. of symbols per frame 204

Time interleave Maximum 4 values: 0, about 0.13, 0.25, 0.5 sec

Frequency interleave Intra-segment or inter-segment interleaving

Inner code Convolutional coding (1/2, 2/3, 3/4, 5/6, 7/8)

Outer code RS (204, 188)

Information bit rate 3.65 Mpbs - 23.23 Mbps

Hierarchical transmission Maximum 3 levels

Basic transmission parameters for terrestrial digital television broadcasting

Basic transmission parameters

24

ARIB standards and ITU-R recommendations for ISDB-T

ARIB standards, ITU-R recommendations

25

The emblem are hidden in a program

　　

Discover the emblem !

Take the emblem into treasure box. 　　　　　　　　→ recorded to NVRAM

Example of data broadcasting in One-Seg “MobiTreasure”

MobiTreasure is a treasure-hunt game that employs the most important feature of One-Seg services, i.e., seamless integration of data broadcasting and the Internet.

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Example of mobile VOD using closed caption as metadata.

Example of mobile VOD through the internet using closed caption as metadata

(3) Viewing

(1) Search

(2) Reading

Keywords“Pitch Shot”

It enables users tosearch by keywords.

User can scroll throughthe text of program stories like a electric book.

User can view a video clip from the point he clicks.