IETF Logo Mail Archive

Re: [rtcweb] Call for Consensus Regarding Selecting Recommended Audio Codecs

Jean-Marc Valin <jmvalin@mozilla.com> Tue, 15 January 2013 17:55 UTC

Return-Path: <jmvalin@mozilla.com>
X-Original-To: rtcweb@ietfa.amsl.com
Delivered-To: rtcweb@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D942421F8712 for <rtcweb@ietfa.amsl.com>; Tue, 15 Jan 2013 09:55:52 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.527
X-Spam-Level:
X-Spam-Status: No, score=-2.527 tagged_above=-999 required=5 tests=[AWL=-0.150, BAYES_00=-2.599, HELO_MISMATCH_ORG=0.611, HOST_MISMATCH_COM=0.311, MIME_8BIT_HEADER=0.3, RCVD_IN_DNSWL_LOW=-1]
Received: from mail.ietf.org ([64.170.98.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id tPtGekeB5XgM for <rtcweb@ietfa.amsl.com>; Tue, 15 Jan 2013 09:55:52 -0800 (PST)
Received: from smtp.mozilla.org (mx2.corp.phx1.mozilla.com [63.245.216.70]) by ietfa.amsl.com (Postfix) with ESMTP id 0A55821F8715 for <rtcweb@ietf.org>; Tue, 15 Jan 2013 09:55:52 -0800 (PST)
Received: from [192.168.16.26] (pool-96-241-176-56.washdc.fios.verizon.net [96.241.176.56]) (Authenticated sender: jvalin@mozilla.com) by mx2.mail.corp.phx1.mozilla.com (Postfix) with ESMTPSA id 9C7C2F2031; Tue, 15 Jan 2013 09:55:50 -0800 (PST)
Message-ID: <50F59825.5070002@mozilla.com>
Date: Tue, 15 Jan 2013 12:55:49 -0500
From: Jean-Marc Valin <jmvalin@mozilla.com>
User-Agent: Mozilla/5.0 (X11; Linux i686 on x86_64; rv:17.0) Gecko/20130107 Thunderbird/17.0.2
MIME-Version: 1.0
To: Stefan Håkansson LK <stefan.lk.hakansson@ericsson.com>
References: <50D2CC6A.4090500@ericsson.com> <50F56C2C.9070209@ericsson.com>
In-Reply-To: <50F56C2C.9070209@ericsson.com>
X-Enigmail-Version: 1.5
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 8bit
Cc: rtcweb@ietf.org
Subject: Re: [rtcweb] Call for Consensus Regarding Selecting Recommended Audio Codecs
X-BeenThere: rtcweb@ietf.org
X-Mailman-Version: 2.1.12
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: Tue, 15 Jan 2013 17:55:53 -0000

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 01/15/2013 09:48 AM, Stefan H￥kansson LK wrote:
> 1. interoperability without quality degradations due to transcoding
> with large installed legacy and existing services. Typical examples
> are interconnection cases to major mobile or fixed communication
> systems. Clearly interop with 3GPP voice services and HD Voice in
> 3GPP and fixed networks is very important. The option with 
> transcoding should be avoided as - besides the equipment costs - it
> is affecting the communication quality in terms of more coding
> distortions and delay.

I'm still in favor of Option 2 (no SHOULD), but if we had to pick a
codec for legacy interop, I think Speex would be a good candidate.
It's included in Flash 10 and up, which is currently installed
(according to Adobe) on 500 million machines. This could provide
WebRTC interop for all the users who don't have a WebRTC-capable browser.

	Jean-Marc

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/

iQEcBAEBAgAGBQJQ9ZglAAoJEJ6/8sItn9q9jCIIAJ9i6Vr1AP17EJBAMlM+1J8p
59r/SRgkK5x3rlIEKC+WD1zb2ByxlWgBQ+Z5QOQ+kcdMxPt3I9LXsXWJmU8EcSRI
jGrZm0vHU72vUgvD6vMdbS2aojfhOQP8LjGXGJIFDlxzreT4Ag0JXvgk1ZCCpca6
TTCk4xfVUV3ZzY+g2BfZrOz41im7AnGDBFROwrUUmPayU49tLRHP5huSDlxAkZil
vkRAbk5VISSgjaRvt4YgquGK0S5n6txEPuYrgDoRDLYMlClhvcMHBZd+T+/0oYU4
f60FSBF8syQ9EAWp1by7HlaeZRr4Xj49vvrpGszVgR6ENe1CkEp179vSYZzpDJc=
=9fNa
-----END PGP SIGNATURE-----

v2.23.0 | Report a Bug | By Email