IETF Logo Mail Archive

Re: [codec] Conformance with unusual sample rates

Gregory Maxwell <gmaxwell@juniper.net> Fri, 18 November 2011 16:13 UTC

Return-Path: <gmaxwell@juniper.net>
X-Original-To: codec@ietfa.amsl.com
Delivered-To: codec@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A873D21F8A96 for <codec@ietfa.amsl.com>; Fri, 18 Nov 2011 08:13:32 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -6.599
X-Spam-Level:
X-Spam-Status: No, score=-6.599 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id lUFwR1eZO4er for <codec@ietfa.amsl.com>; Fri, 18 Nov 2011 08:13:32 -0800 (PST)
Received: from exprod7og105.obsmtp.com (exprod7og105.obsmtp.com [64.18.2.163]) by ietfa.amsl.com (Postfix) with ESMTP id E9CC721F84CD for <codec@ietf.org>; Fri, 18 Nov 2011 08:13:31 -0800 (PST)
Received: from P-EMHUB02-HQ.jnpr.net ([66.129.224.36]) (using TLSv1) by exprod7ob105.postini.com ([64.18.6.12]) with SMTP ID DSNKTsaEHz3BcePnzPp9Gubt/2V2vS9s0Qsz@postini.com; Fri, 18 Nov 2011 08:13:31 PST
Received: from EMBX01-HQ.jnpr.net ([fe80::c821:7c81:f21f:8bc7]) by P-EMHUB02-HQ.jnpr.net ([fe80::88f9:77fd:dfc:4d51%11]) with mapi; Fri, 18 Nov 2011 08:10:51 -0800
From: Gregory Maxwell <gmaxwell@juniper.net>
To: "bens@alum.mit.edu" <bens@alum.mit.edu>, John Ridges <jridges@masque.com>
Date: Fri, 18 Nov 2011 08:07:52 -0800
Thread-Topic: [codec] Conformance with unusual sample rates
Thread-Index: AcymCqU/+I/JzKCdSJyeVTTShHxl1QAAZS/a
Message-ID: <BCB3F026FAC4C145A4A3330806FEFDA93D19F6B50A@EMBX01-HQ.jnpr.net>
References: <4EC66BAE.9000600@masque.com>,<4EC68024.8010308@fas.harvard.edu>
In-Reply-To: <4EC68024.8010308@fas.harvard.edu>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
acceptlanguage: en-US
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
Cc: "codec@ietf.org" <codec@ietf.org>
Subject: Re: [codec] Conformance with unusual sample rates
X-BeenThere: codec@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: Codec WG <codec.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/codec>, <mailto:codec-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/codec>
List-Post: <mailto:codec@ietf.org>
List-Help: <mailto:codec-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/codec>, <mailto:codec-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 18 Nov 2011 16:13:32 -0000

Behalf Of Benjamin M. Schwartz [bmschwar@fas.harvard.edu]:
> One answer is "no".  Opus always operates at a fixed nominal samplerate of
> 48000 Hz.

It's not really any more true to say 48k there than to say 8k, 12k, 16k, 24k other
than the fact that you'd timestamp it at 48k. 

Which is why I think it's most accurate to describe it as rate-less.

v2.23.0 | Report a Bug | By Email