Re: [rtcweb] Congratuiations on the Cisco announcement - but we still prefer VP8

Gregory Maxwell <greg@xiph.org> Thu, 07 November 2013 09:47 UTC

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Date: Thu, 7 Nov 2013 01:47:00 -0800
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From: Gregory Maxwell <greg@xiph.org>
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Cc: Harald Alvestrand <hta@google.com>, "rtcweb@ietf.org" <rtcweb@ietf.org>
Subject: Re: [rtcweb] Congratuiations on the Cisco announcement - but we still prefer VP8
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On Wed, Nov 6, 2013 at 10:35 PM, David Singer <singer@apple.com> wrote:
> On Nov 7, 2013, at 15:19 , Harald Alvestrand <hta@google.com> wrote:
>> Re performance, and just so that silence isn't taken as me agreeing with David Singer on this topic:
>> I haven't wanted to distract from the debate at hand by tossing more numbers around, but we do think VP8 is significantly better than Baseline. The exchanges with Ericsson have shown that we need to be meticulously clear in defining what we mean by that and how we measure it, so I won't post more numbers until I feel that our description is precise enough.
>
> I also would like to see some tests which tell us where we really are.  A lot of us are engineers who like having facts, even if, as many of us realize, the comparative performance is a minor part of the debate.
>
> I welcome Ericsson's efforts to get clarity in this area; they seem to have been working very hard to get a level playing field measure, and if you can help that effort, this would be all to the good.

Hm.  Maybe I'm confused: I thought slide 9 from the H.264 "joint
presentation" in Atlanta (
http://tools.ietf.org/agenda/85/slides/slides-85-rtcweb-10.pdf )
showed baseline needing 16% more bitrate than VP8 at the same quality,
and the debate was more over high profile and the magnitude of VP8's
lead wrt baseline.

(And, also in agreement: quality isn't the thing to debate in
excruciating detail, but I did think at least this point wasn't
controversial. Did I miss a post?)