which codec for webrtc?
DESCRIPTION
There is an ongoing debate as to which codecs should WebRTC mandate: VP8 or H.264, G.7xx series or Opus. Where does this debate come from? What lies behind the different sides in this debate, and why we all should strive for a simple solution? You can find my impressions and more details about the conference here: http://bloggeek.me/webrtc-conference-wrapup/TRANSCRIPT
Which Codec for WebRTC?
Tsahi Levent-LeviDirector of Business Solutions, PBG - PSM
October 2012
Information Security Level 2 – Sensitive© 2012 – Proprietary and Confidential Information of Amdocs1
“Audio and Video Codecs Will
Never Converge”
3
Looks familiar?
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Skipping to video: Which codec is best?
H.261 H.263 H.264 H.265
Complexity
H.261 H.263 H.264 H.265
Bit rate
Compression isn’t the only measurement
Technologyvs
Business
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Technology
Complexity
ResilienceLatency
Bitrate
Qua
lity
8
Business (and politics…)Business
Hardware availabilityInteroperability
Intellectual propertyEcosystem
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Justin Uberti, Google
“Given the ability to deliver a royalty-free platform with no compromises on quality, we see no reason to include mandatory royalty-bearing codecs.”
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Bo Burman, Ericsson
“H.264 support is a requirement in some regulatory frameworks, such as emergency services […]
AMR narrow-band is playing a key role in mobile telephony and has a huge footprint.”
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Bo Burman, Ericsson
“We would […] like to recommend […] AMR-WB and EVS, since we expect them to be available in mobile chipsets.”
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Mandyam Giridhar, Qualcomm
“G.711 is universal, unencumbered, and widely implemented. […]
A mandate for Opus will limit initial RTCWeb clients to use software-based codecs […]”
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WebRTC Mandatory Codecs is NOT
about Technology
The End Game
G.711and
Opus
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VP8or
H.264
Information Security Level 2 – Sensitive© 2012 – Proprietary and Confidential Information of Amdocs15
Browsers will differ in the optional codecs they will support
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Should WebRTC ignore “legacy” systems?
“Legacy” Systems and Codecs
Opus anyone?
Transcoding Will be Needed…
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Transcoding Will be Needed…
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Packet loss resiliency
Trusted third party
ExpensiveReduces quality
Adds latency
Information Security Level 2 – Sensitive© 2012 – Proprietary and Confidential Information of Amdocs20
There Are No Easy Answers
Image credits
filippo_jean
m-louis x6e38 casey.marshall
Sam Howzit wilhei55 suzyq212 kowitz
Parvin AMagill seyed mostafa zamaniSamuel M. Livingston apliniste
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Thank You!
Tsahi Levent-LeviDirector of Business Solutions, PBG – PSM
[email protected]://bloggeek.me