IETF Logo Mail Archive

Re: [AVT] T.38 over RTP: RTP Sequence Number

Colin Perkins <csp@csperkins.org> Wed, 20 July 2005 19:20 UTC

Received: from localhost.localdomain ([127.0.0.1] helo=megatron.ietf.org) by megatron.ietf.org with esmtp (Exim 4.32) id 1DvK73-0007GD-Dc; Wed, 20 Jul 2005 15:20:13 -0400
Received: from odin.ietf.org ([132.151.1.176] helo=ietf.org) by megatron.ietf.org with esmtp (Exim 4.32) id 1DvK71-0007Fr-Jp for avt@megatron.ietf.org; Wed, 20 Jul 2005 15:20:11 -0400
Received: from ietf-mx.ietf.org (ietf-mx [132.151.6.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id PAA23064 for <avt@ietf.org>; Wed, 20 Jul 2005 15:20:09 -0400 (EDT)
Received: from mr1.dcs.gla.ac.uk ([130.209.249.184]) by ietf-mx.ietf.org with esmtp (Exim 4.43) id 1DvKar-0002UM-S0 for avt@ietf.org; Wed, 20 Jul 2005 15:51:05 -0400
Received: from alor.dcs.gla.ac.uk ([130.209.247.84]:61140) by mr1.dcs.gla.ac.uk with esmtpsa (TLSv1:RC4-SHA:128) (Exim 4.42) id 1DvK6n-0008P3-8i; Wed, 20 Jul 2005 20:19:57 +0100
In-Reply-To: <EF8DFB1B64FF0A43AB00555B8E2717B101DE0108@aclmsg.corp.audiocodes.com>
References: <EF8DFB1B64FF0A43AB00555B8E2717B101DE0108@aclmsg.corp.audiocodes.com>
Mime-Version: 1.0 (Apple Message framework v733)
Content-Type: text/plain; charset="US-ASCII"; delsp="yes"; format="flowed"
Message-Id: <3B0FC2D7-451E-4001-8F69-C2A43B460ED5@csperkins.org>
Content-Transfer-Encoding: 7bit
From: Colin Perkins <csp@csperkins.org>
Subject: Re: [AVT] T.38 over RTP: RTP Sequence Number
Date: Wed, 20 Jul 2005 20:19:48 +0100
To: Oren Peleg <OrenP@audiocodes.com>
X-Mailer: Apple Mail (2.733)
X-Spam-Score: 0.0 (/)
X-Scan-Signature: d6b246023072368de71562c0ab503126
Content-Transfer-Encoding: 7bit
Cc: "Paul E. Jones" <paulej@packetizer.com>, Vladimir Ulybin <Vladimir@audiocodes.com>, avt@ietf.org, Magnus Westerlund <magnus.westerlund@ericsson.com>
X-BeenThere: avt@ietf.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Audio/Video Transport Working Group <avt.ietf.org>
List-Unsubscribe: <https://www1.ietf.org/mailman/listinfo/avt>, <mailto:avt-request@ietf.org?subject=unsubscribe>
List-Post: <mailto:avt@ietf.org>
List-Help: <mailto:avt-request@ietf.org?subject=help>
List-Subscribe: <https://www1.ietf.org/mailman/listinfo/avt>, <mailto:avt-request@ietf.org?subject=subscribe>
Sender: avt-bounces@ietf.org
Errors-To: avt-bounces@ietf.org

On 20 Jul 2005, at 20:16, Oren Peleg wrote:
> I would like to suggest the following:
>
> Since Timestamp is profile specific, the T.38 RTP profile draft
> (currently draft-jones-avt-audio-t38-05.txt) will add a special  
> case of
> Timestamp manipulation which will be used for redundant control packet
> transmission (similar to the End packet of the RFC 2833 event). At  
> this
> special case the timestamp that will be used at the redundant packets
> will be the same as the timestamp of the original packet. The  
> number of
> redundant packets will be determined via SDP using a special  
> parameter.

This is incompatible with all other uses of RFC 2198, and contrary to  
the RTP timing model.

Colin

_______________________________________________
Audio/Video Transport Working Group
avt@ietf.org
https://www1.ietf.org/mailman/listinfo/avt

v2.23.0 | Report a Bug | By Email