[rtcweb] Proposal for media receiver request of codec parameter changes (draft-westerlund-avtext-codec-operation-point-00)
Magnus Westerlund <magnus.westerlund@ericsson.com> Thu, 08 March 2012 12:55 UTC
Return-Path: <magnus.westerlund@ericsson.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 7454021F8609 for <rtcweb@ietfa.amsl.com>; Thu, 8 Mar 2012 04:55:24 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -110.344
X-Spam-Level:
X-Spam-Status: No, score=-110.344 tagged_above=-999 required=5 tests=[AWL=0.255, BAYES_00=-2.599, RCVD_IN_DNSWL_HI=-8, USER_IN_WHITELIST=-100]
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 URFMCknsK6hN for <rtcweb@ietfa.amsl.com>; Thu, 8 Mar 2012 04:55:24 -0800 (PST)
Received: from mailgw9.se.ericsson.net (mailgw9.se.ericsson.net [193.180.251.57]) by ietfa.amsl.com (Postfix) with ESMTP id 09BAF21F856A for <rtcweb@ietf.org>; Thu, 8 Mar 2012 04:55:19 -0800 (PST)
X-AuditID: c1b4fb39-b7bf2ae0000069a1-5a-4f58ac360c9e
Received: from esessmw0237.eemea.ericsson.se (Unknown_Domain [153.88.253.124]) by mailgw9.se.ericsson.net (Symantec Mail Security) with SMTP id 23.23.27041.63CA85F4; Thu, 8 Mar 2012 13:55:18 +0100 (CET)
Received: from [127.0.0.1] (153.88.115.8) by esessmw0237.eemea.ericsson.se (153.88.115.91) with Microsoft SMTP Server id 8.3.213.0; Thu, 8 Mar 2012 13:55:17 +0100
Message-ID: <4F58AC35.1010500@ericsson.com>
Date: Thu, 08 Mar 2012 13:55:17 +0100
From: Magnus Westerlund <magnus.westerlund@ericsson.com>
User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2
MIME-Version: 1.0
To: "rtcweb@ietf.org" <rtcweb@ietf.org>
X-Enigmail-Version: 1.3.5
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 8bit
X-Brightmail-Tracker: AAAAAA==
Subject: [rtcweb] Proposal for media receiver request of codec parameter changes (draft-westerlund-avtext-codec-operation-point-00)
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: Thu, 08 Mar 2012 12:55:24 -0000
WG, As an individual I would like to inform you that my colleagues and I have submitted a proposal to AVTEXT WG. This proposal is an RTCP extension that enables RTP session participants to request the media sender to adjust its media parameters, like video resolution. The draft can be retrieved here: https://datatracker.ietf.org/doc/draft-westerlund-avtext-codec-operation-point/ One use case we have designed this for is to enable the dynamic updates codec parameters as result of WebRTC applications usage of media streams. If the application changes the rendering layout or the user changes the browser window size, the size of a video playout can change. This may happen in a quite dynamic way and often enough that we think using a mechanism where the receiver can use a request over the media plane rather than the signalling plane to adjust the parameters will give a more responsive and satisfying experience. We have also designed it with centralized conferencing into mind, allowing the central node to aggregate requests to best suit the whole population. We request that feedback on the actual extension are directed to the AVTEXT WG mailing list: avtext@ietf.org I am happy to discuss the usage and applicability to WebRTC on this list. Cheers Magnus Westerlund ---------------------------------------------------------------------- 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] Proposal for media receiver request of c… Magnus Westerlund
- Re: [rtcweb] Proposal for media receiver request … Magnus Westerlund