Re: [codec] RTP Payload Format and File Storage Format for Opus Speech and Audio Codec - draft-spittka-payload-rtp-opus-00
"Roni Even" <ron.even.tlv@gmail.com> Tue, 05 July 2011 21:17 UTC
Return-Path: <ron.even.tlv@gmail.com>
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 EA61C21F89D2; Tue, 5 Jul 2011 14:17:44 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -3.599
X-Spam-Level:
X-Spam-Status: No, score=-3.599 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, 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 oIRNfhoHx4WP; Tue, 5 Jul 2011 14:17:43 -0700 (PDT)
Received: from mail-ww0-f44.google.com (mail-ww0-f44.google.com [74.125.82.44]) by ietfa.amsl.com (Postfix) with ESMTP id A5DFB21F8989; Tue, 5 Jul 2011 14:17:42 -0700 (PDT)
Received: by wwe5 with SMTP id 5so4270398wwe.13 for <multiple recipients>; Tue, 05 Jul 2011 14:17:41 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=from:to:cc:references:in-reply-to:subject:date:message-id :mime-version:content-type:content-transfer-encoding:x-mailer :thread-index:content-language; bh=C9kRzzvUQN2ptGAxryZ46mFUj6UQs9bSyppDOm0kqkk=; b=O1INOwDxMw6sVdpJOfYQ0fWuGg/bkJ9xghXVg+hg2bTNzGbqTCifc8qkYF0iSLcYad aUMCInBrqLpuFHCnk1PmefP0vmMYjNFUtD6LMtoYh7hKX+xf3s48B7IwjRMpvEFDndIq 6/IqeB1eV0tA5MkYIFa435kGoPdSxaxkSXxj8=
Received: by 10.217.7.3 with SMTP id z3mr6406250wes.68.1309900661536; Tue, 05 Jul 2011 14:17:41 -0700 (PDT)
Received: from windows8d787f9 (bzq-79-176-43-124.red.bezeqint.net [79.176.43.124]) by mx.google.com with ESMTPS id n21sm3879955wed.19.2011.07.05.14.17.37 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 05 Jul 2011 14:17:40 -0700 (PDT)
From: Roni Even <ron.even.tlv@gmail.com>
To: bens@alum.mit.edu, julian.spittka@skype.net
References: <00f501cc3aa7$551264c0$ff372e40$@spittka@skype.net> <4E133E21.3050001@fas.harvard.edu>
In-Reply-To: <4E133E21.3050001@fas.harvard.edu>
Date: Wed, 06 Jul 2011 00:15:21 +0300
Message-ID: <4e137f74.9545d80a.4f62.65af@mx.google.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
X-Mailer: Microsoft Office Outlook 12.0
Thread-Index: Acw7MjMua76S7kZPQoSi4yd0CWWc9wAJXgQQ
Content-Language: en-us
Cc: codec@ietf.org, payload@ietf.org
Subject: Re: [codec] RTP Payload Format and File Storage Format for Opus Speech and Audio Codec - draft-spittka-payload-rtp-opus-00
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: Tue, 05 Jul 2011 21:17:45 -0000
Hi, I find it difficult to address all you comments being in XML patch format. In general the payload specification should provide enough information that will enable the reader to create or parse the RTP payload without understanding the codec payload based on the payload specification. As such it is useful to provide information that will explain the general concepts of the codec and the optional parameters. So I find sections 1 and 3 useful and they should be in the document Roni Even > -----Original Message----- > From: codec-bounces@ietf.org [mailto:codec-bounces@ietf.org] On Behalf > Of Benjamin M. Schwartz > Sent: Tuesday, July 05, 2011 7:39 PM > To: julian.spittka@skype.net > Cc: codec@ietf.org > Subject: Re: [codec] RTP Payload Format and File Storage Format for > Opus Speech and Audio Codec - draft-spittka-payload-rtp-opus-00 > > On 07/04/2011 08:06 PM, Julian Spittka wrote: > > Any feedback, questions, or comments are highly welcome. > > Thank you for doing this work. I think your proposed RTP and SDP > formats are very nice and a good step for us. > > I have a few comments. > > 1. I think the description of Opus should be removed. There's no need > to duplicate the contents of the Opus RFC. > > 2. I think the payload specification should make (almost) no mention > of Opus frames, modes, etc. These aspects of Opus are entirely > internal to the payload, which is a "black box". As far as the RTP > specification is concerned, Opus consists of (almost-)arbitrary- > duration "packets" and that's it. > > 3. To avoid confusion, I think we should be very careful and clear > about the distinction between audio bandwidth and samplerate, as their > relationship in Opus is far from simple. > > I have implemented these ideas, along with a few minor changes, as a > patch to the draft .xml, attached. Please feel free to discard this > patch; I mean it only as a way to communicate my suggestions more > clearly. > > --Ben
- [codec] RTP Payload Format and File Storage Forma… Julian Spittka
- Re: [codec] RTP Payload Format and File Storage F… Gregory Maxwell
- Re: [codec] RTP Payload Format and File Storage F… Kevin P. Fleming
- Re: [codec] RTP Payload Format and File Storage F… Timothy B. Terriberry
- Re: [codec] RTP Payload Format and File Storage F… Benjamin M. Schwartz
- Re: [codec] RTP Payload Format and File Storage F… Roni Even
- Re: [codec] RTP Payload Format and File Storage F… Roni Even
- Re: [codec] RTP Payload Format and File Storage F… Cullen Jennings
- Re: [codec] RTP Payload Format and File Storage F… Magnus Westerlund
- Re: [codec] RTP Payload Format and File Storage F… Cullen Jennings
- Re: [codec] RTP Payload Format and File Storage F… Benjamin M. Schwartz
- Re: [codec] [payload] RTP Payload Format and File… Benjamin M. Schwartz