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

Leon Geyser <lgeyser@gmail.com> Mon, 25 November 2013 14:30 UTC

Return-Path: <lgeyser@gmail.com>
X-Original-To: rtcweb@ietfa.amsl.com
Delivered-To: rtcweb@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id F03441AD9AD for <rtcweb@ietfa.amsl.com>; Mon, 25 Nov 2013 06:30:13 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.999
X-Spam-Level:
X-Spam-Status: No, score=-1.999 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, SPF_PASS=-0.001] autolearn=ham
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id JaTOmZpuKbVA for <rtcweb@ietfa.amsl.com>; Mon, 25 Nov 2013 06:30:11 -0800 (PST)
Received: from mail-lb0-x230.google.com (mail-lb0-x230.google.com [IPv6:2a00:1450:4010:c04::230]) by ietfa.amsl.com (Postfix) with ESMTP id 6F5C11ADDBF for <rtcweb@ietf.org>; Mon, 25 Nov 2013 06:30:11 -0800 (PST)
Received: by mail-lb0-f176.google.com with SMTP id x18so3196691lbi.7 for <rtcweb@ietf.org>; Mon, 25 Nov 2013 06:30:10 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=KbmeZh2x29iB5rYd7+SqkHDSOYECCs2jsuIHqPUSMnE=; b=miJ3Tzq8p1c4hOukLizHs1Hua27UuNhBx6PonHHn8W+TgZ4w8aZdGYfpcOteB7Kc+H Vg6OFZr2eVlqL4+sKnajtjar73J/l44USd5Sm/4dVeXnNPzNibjUXr52QB6wa7sCmlny p1enbuf/xPbPUVc+tYTeT+kPnznXZWE1k2LqHD1G13tQqB151rfISJ0y9UcbMExddLq9 5Ba/IUbz0Zixro2MJLOK/jecSnTwzW89rmJx21+3QcYulMY+aGWpdqsMkKvgWde6TewK vL6ECEIedaZWzm0hhKn20/kR/OM87CFZQyCLI26S8mQoY9cbZfX5yhex/HcPWfdLFdv/ HJow==
MIME-Version: 1.0
X-Received: by 10.152.3.10 with SMTP id 10mr1698198lay.35.1385389810779; Mon, 25 Nov 2013 06:30:10 -0800 (PST)
Received: by 10.114.168.70 with HTTP; Mon, 25 Nov 2013 06:30:10 -0800 (PST)
In-Reply-To: <52935C89.5040408@ericsson.com>
References: <52935C89.5040408@ericsson.com>
Date: Mon, 25 Nov 2013 16:30:10 +0200
Message-ID: <CAGgHUiQnkQKkc-ptMu6DtfUYJY6N9i7PUaeAqKxp96nB2MQBGA@mail.gmail.com>
From: Leon Geyser <lgeyser@gmail.com>
To: Magnus Westerlund <magnus.westerlund@ericsson.com>
Content-Type: multipart/alternative; boundary=089e014941f48c0ac004ec01333a
Cc: "rtcweb@ietf.org" <rtcweb@ietf.org>
Subject: Re: [rtcweb] Video Codec Selection Alternatives 10 and 11: Merge?
X-BeenThere: rtcweb@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: Real-Time Communication in WEB-browsers working group list <rtcweb.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/rtcweb>, <mailto:rtcweb-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/rtcweb/>
List-Post: <mailto:rtcweb@ietf.org>
List-Help: <mailto:rtcweb-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/rtcweb>, <mailto:rtcweb-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 25 Nov 2013 14:30:14 -0000

Hi Magnus,

Was H.263 a typo?
I agree that 10 can be changed to:
10. MUST implement at least two of {VP8, H.264 CBP, H.261}



On 25 November 2013 16:19, Magnus Westerlund <magnus.westerlund@ericsson.com
> wrote:

> Hi,
>
> 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.
>
> Thus my question to the WG and especially the ones proposing 10 and 11.
> Would anyone disagree with removing alternative 10. in favor of 11.?
>
> 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.
>
> Cheers
>
> Magnus Westerlund
> (As WG chair)
>
> ----------------------------------------------------------------------
> Multimedia Technologies, Ericsson Research EAB/TVM
> ----------------------------------------------------------------------
> Ericsson AB                | Phone  +46 10 7148287
> Färögatan 6                | Mobile +46 73 0949079
> SE-164 80 Stockholm, Sweden| mailto: magnus.westerlund@ericsson.com
> ----------------------------------------------------------------------
>
> _______________________________________________
> rtcweb mailing list
> rtcweb@ietf.org
> https://www.ietf.org/mailman/listinfo/rtcweb
>