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SPIRENT CHROMATIC
MOBILE VIDEO QUALITY OF EXPERIENCEMEASUREMENT SYSTEMMobile video streaming and video chat are two applications that are surging in growth, drivenby rapid smartphone and tablet adoption, and LTE rollout, worldwide.
OVERVIEW
The complex interactions between devices, networks, andapplications result in a wide variation in the consumers VideoQuality of Experience (VQoE), which has become an importantdifferentiator in choosing an operator or a device.
Expectations are rising and consumers will not purchase devicesor subscribe to networks that render jerky images, frozen andimpaired frames, or out-of-sync audio. Operators in turn needto understand the subscriber experience under varying networkconditions, with different devices and applications.
Chromatic is the most advanced, streamlined and cost-effectivemethod to objectively measure VQoE with Key PerformanceIndices (KPIs) across all devices and access technologies.
Online video
25% of smartphone traffic
40% of tablet traffic
Almost 50% of smartphone viewing is outside the home
Twelve-fold increase in data demand 2012-2018
Ericsson Mobility Report Nov 2012
BENEFITS Leading methodology for evaluating users VQoE in the lab
and in the field
Measures performance of the most popular video use cases-video streaming and video chat
Supports all screen sizes from smartphones to tablets, and avariety of resolutions, codecs and file formats
Viewed video is captured by high-speed camera, eliminatingthe need for any software on the device
Ready-to-use test content library available from the cloud, on
YouTube, or on dedicated private servers Data collection and processing delivers rapid results cost-
effectively
Key Performance Indices (KPIs) are intuitive and easy tounderstand by the layperson or expert. The KPIs reflect end-to-end performance, from source to screen
Test equipment is packaged into a rugged Pelican case forstationary and mobility testing
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MOBILE VIDEO QUALITY OF EXPERIENCE MEASUREMENT SYSTEM
SPIRENT CHROMATIC
SYSTEM ARCHITECTURE
Chromatic allows the video being played on two devices to besimultaneously captured and analyzed. The two different devicescan be on the same network, or the same device on two differentnetworks.
HOW CHROMATIC CAN BE USED Comparing popular video sharing services (e.g., YouTube) on
different wireless networks
Comparing popular video chat services e.g., (Tango, Skype,IR.94-based services)
Comparing lab & field video performance
Device pre-release and acceptance testing
Video application testing
Video optimization gateway testing
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MOBILE VIDEO QUALITY OF EXPERIENCE MEASUREMENT SYSTEM
SPIRENTCHROMATIC
YouTube Test Clip
30 fps
YouTube Test Clip
20 fps
YouTube Test Clip
15 fps
CHROMATIC VIDEO KPIs
Observed Frame Rate (Average) 29.2 18.7 13.5
Frame Rate Standard Deviation 1.1 0.6 0.2Session Score (Average) 4.6 3.5 2.9
CHROMATIC AV SYNCH KPIs
Average of AV Sync Lead, ms 25 55 70
Average of AV Sync Lag, ms -111 -154 -215
% Segments within +50 to -200 ms 100.0% 65.1% 31.3%
SAMPLE KPI CHARTS & TABLES
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Framerate
Observed Framerate (fps)
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2013 Spirent Communications, Inc. All of the company names and/or brand names and/or product names and/or logos referred to in
this document, in particular the name Spirent and its logo device, are either registered trademarks or trademarks pending registration
in accordance with relevant national laws. All rights reserved. Specifications subject to change without notice. Rev. B 01/13
AMERICAS 1-800-SPIRENT +1-818-676-2683 [email protected]
EUROPE AND THE MIDDLE EAST+44 (0) 1293 767979 [email protected]
ASIA AND THE PACIFIC +86-10-8518-2539 [email protected]
MOBILE VIDEO QUALITY OF EXPERIENCE MEASUREMENT SYSTEM
SPIRENTCHROMATIC
SPIRENT SERVICES
Spirent Global Services provides a variety of professionalservices, support services and education servicesall focusedon helping customers meet their complex testing and serviceassurance requirements. For more information, visit the GlobalServices website at www.spirent.comor contact your Spirentsales representative.
FIT4LAUNCH
TECHNICAL SPECIFICATIONS
Network Technologies LTE, WiMAX, UMTS, CDMA2000, WiFi
Devices Smartphones & tablets
Device Operating Systems OS-AgnosticCodecs/Containers All popular A/V codecs & containers
Video Chat Skype, Gtalk, Joyn, Tango and more
KPIs Video frame-rate performance Audio-video sync performance
Video freeze metrics
Video impairment metrics
Video and audio scores
Video reliability metrics
