Re: [rtcweb] Video Codec Selection Alternatives 10 and 11: Merge?

Bjoern Hoehrmann <derhoermi@gmx.net> Mon, 25 November 2013 14:29 UTC

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From: Bjoern Hoehrmann <derhoermi@gmx.net>
To: Magnus Westerlund <magnus.westerlund@ericsson.com>
Date: Mon, 25 Nov 2013 15:29:49 +0100
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Cc: "rtcweb@ietf.org" <rtcweb@ietf.org>
Subject: Re: [rtcweb] Video Codec Selection Alternatives 10 and 11: Merge?
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* Magnus Westerlund wrote:
>I would like to draw your attention to the following two alternative:
>
>10. All entities SHOULD support both H.264 and VP8. All entities MUST
>    at least implement one of those. Entities that do not support both
>    H.264 and VP8 MUST implement H.261.
>
>11. MUST implement at least two of {VP8, H.264 CBP, H.263}
>
>I would note that 10 and 11 are equivalent on the MUST level. The only
>thing that separates 10 out is the SHOULD implement both H.264 and VP8.

No, 10 has H.261 as a MUST in a certain circumstance, 11 does not.

>Just trying to avoid having two alternatives that are extremely close to
>each other. My thinking is that if we manage to select any MTI, i.e.
>MUST statements, we can discuss what SHOULDs and RECOMMENDATIONs that we
>want to make in addition.

If the Working Group decides to conduct a vote on this matter, I think
questions about "SHOULD"-level requirements should be left out of it.
-- 
Björn Höhrmann · mailto:bjoern@hoehrmann.de · http://bjoern.hoehrmann.de
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