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

[David Singer <[e-mail]>]

On Oct 24, 2013, at 7:30 , Ted Hardie <[e-mail]> wrote:

> On Thu, Oct 24, 2013 at 6:26 AM, Bo Burman <[e-mail]> wrote:
> 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.
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> Hi Bo,
> 
> I note that one of the recent editorial updates you made to the draft is this:
> 
>  H.264 Constrained High Profile Level 1.3, logically extended to
>       support 720p resolution at 30 Hz framerate is RECOMMENDED.
> 
> 
> that is, you added the word "logically".  Is "logically extended" a term of 
> art here, or do you simply mean you think it makes sense to extend the
> 
> support to Constrained High Profile Level 1.3?

I think that merely means it's easier to speak of extending a level to support something, but actually, it would formally have to be expressed as a restriction on a higher level (which takes more explaining and words, which don't seem needed here).

David Singer
Multimedia and Software Standards, Apple Inc.