Re: [rtcweb] VP8 vs H.264 - the core issue

[Bo Burman <[e-mail]>]

1) We do agree that H.264 Constrained Baseline and VP8 are comparable in terms of video quality. But do not forget that Constrained Baseline's twin sister H.264 Constrained High outperforms VP8 by a huge margin. This is also relevant.

2) The "back-and forth of numbers" seems to refer to Ericsson's work where we tried to make a fair comparison to evaluate the extraordinary claims from Google that VP8 is 70 or 40 percent better than x264. We found serious issues with the way Google performed the test, maybe the most striking were the use of padding (+8% for x264) and excessive number of threads (+10% to +40% for x264) to add overhead to x264. That Google managed to remember the threading parameter only when it helped
VP8 (the speed test) is also quite remarkable.

3) Regarding IPR, this is a difficult topic, but we're not at all convinced that VP8 is royalty free. For example, there is an IETF IPR disclosure (https://datatracker.ietf.org/ipr/2035/) where the IPR holder seems unwilling to license (on any terms), and http://www.fosspatents.com/2013/06/german-vp8-infringement-cases-show.html and http://www.fosspatents.com/2013/06/itc-institutes-investigation-of-nokias.html show that there are in fact ongoing litigations regarding VP8 - and this is only skimming the surface of what is available in public space.

/Bo

From: [e-mail] [mailto:[e-mail]] On Behalf Of Harald Alvestrand
Sent: den 24 oktober 2013 13:12
To: [e-mail]
Subject: Re: [rtcweb] VP8 vs H.264 - the core issue

On 10/23/2013 09:42 PM, Basil Mohamed Gohar wrote:

On 10/23/2013 02:51 PM, Harald Alvestrand wrote:

Just a reminder:

The back-and-forth of numbers doesn't change the core question of this

debate.

Both codecs are capable of high quality video encoding, and performance

numbers are comparable.



The real core question is the IPR issue.



The tradition of the IETF says that allowing only business models that

can sustain royalty agreements and royalty payments is Bad for the Internet.



The dominant video codec, H.264, is a royalty-required codec.



Do we switch now, or do we give up and live with royalties forever?





Harald,



I would like to see some references to the tradition of the IETF that

you've quoted.



For the record, I agree with the sentiment, but I'd like to be able to

back up the claim itself with references or explicit decisions that were

made in that regard.  I'm not trying to be a thorn in your side, just

looking for citations to back up the arguments, both on and off list.


Basil, very happy to provide references!

RFC 3979, a core document about IPR in the IETF, 2005:



8.  Evaluating Alternative Technologies in IETF Working Groups



   In general, IETF working groups prefer technologies with no known IPR

   claims or, for technologies with claims against them, an offer of

   royalty-free licensing.  But IETF working groups have the discretion

   to adopt technology with a commitment of fair and non-discriminatory

   terms, or even with no licensing commitment, if they feel that this

   technology is superior enough to alternatives with fewer IPR claims

   or free licensing to outweigh the potential cost of the licenses.

The complete section gives some more details, but this is the central quote.

You may also enjoy reading the section of RFC 6569 (the guidelines that were followed in the OPUS work) that deals with IPR:

http://tools.ietf.org/html/rfc6569#page-8






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