[MMUSIC] Draft on source-specific SDP attributes: draft-lennox-mmusic-sdp-source-attributes-00
Jonathan Lennox <jonathan@layeredmedia.com> Tue, 27 February 2007 19:03 UTC
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Date: Tue, 27 Feb 2007 14:03:28 -0500
From: Jonathan Lennox <jonathan@layeredmedia.com>
To: avt@ietf.org, mmusic@ietf.org
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Cc: 'Thomas Schierl' <schierl@hhi.fhg.de>, 'Joerg Ott' <jo@netlab.tkk.fi>
Subject: [MMUSIC] Draft on source-specific SDP attributes: draft-lennox-mmusic-sdp-source-attributes-00
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Joerg Ott, Thomas Schierl, and I have written an Internet-Draft on source-specific SDP attributes, draft-lennox-mmusic-sdp-source-attributes-00, now available from the I-D repository. The draft allows individual RTP sources to be described in SDP session descriptions, generalizing the mechanism used by the draft on RTCP extensions for single-source multicast (draft-ietf-avt-rtcpssm). It was also originally motivated by the desire to support ssrc-multiplexing of H.264 SVC, as originally used by draft-wenger-avt-rtp-svc-02 and draft-schierl-mmusic-layered-codec-01, though the latest revisions of those drafts have dropped support for ssrc-multiplexing for other reasons. Comments are welcome. I'm sending this annoucement to the AVT group as well as MMUSIC, as the draft's mechanisms have non-trivial interactions with RTP collision detection. Please direct followups to only one of the working group mailing lists, depending on the topic being discussed. -- Jonathan Lennox -- Layered Media jonathan@layeredmedia.com
--- Begin Message ---A New Internet-Draft is available from the on-line Internet-Drafts directories. Title : Source-Specific Media Attributes in the Session Description Protocol (SDP) Author(s) : J. Lennox, et al. Filename : draft-lennox-mmusic-sdp-source-attributes-00.txt Pages : 20 Date : 2007-2-26 The Session Description Protocol provides mechanisms to describe attributes of multimedia sessions and of individual media streams (e.g., Real-time Transport Protocol (RTP) sessions) within a multimedia session, but does not provide any mechanism to describe individual media sources within a media stream. This document defines a mechanism to describe RTP media sources, identified by their Synchronization Source Identifiers (SSRCs), in SDP, associate attributes with these sources, and express relationships among sources. It also defines a number of source-level attributes which can be used to describe properties of media sources. A URL for this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-lennox-mmusic-sdp-source-attribute s-00.txt To remove yourself from the I-D Announcement list, send a message to i-d-announce-request@ietf.org with the word unsubscribe in the body of the message. You can also visit https://www1.ietf.org/mailman/listinfo/I-D-announce to change your subscription settings. Internet-Drafts are also available by anonymous FTP. Login with the username "anonymous" and a password of your e-mail address. After logging in, type "cd internet-drafts" and then "get draft-lennox-mmusic-sdp-source-attributes-00.txt". A list of Internet-Drafts directories can be found in http://www.ietf.org/shadow.html or ftp://ftp.ietf.org/ietf/1shadow-sites.txt Internet-Drafts can also be obtained by e-mail. Send a message to: mailserv@ietf.org. In the body type: "FILE /internet-drafts/draft-lennox-mmusic-sdp-source-attributes-00.txt". NOTE: The mail server at ietf.org can return the document in MIME-encoded form by using the "mpack" utility. To use this feature, insert the command "ENCODING mime" before the "FILE" command. To decode the response(s), you will need "munpack" or a MIME-compliant mail reader. Different MIME-compliant mail readers exhibit different behavior, especially when dealing with "multipart" MIME messages (i.e. documents which have been split up into multiple messages), so check your local documentation on how to manipulate these messages. Below is the data which will enable a MIME compliant mail reader implementation to automatically retrieve the ASCII version of the Internet-Draft.--- End Message ---
_______________________________________________ mmusic mailing list mmusic@ietf.org https://www1.ietf.org/mailman/listinfo/mmusic
- [MMUSIC] Draft on source-specific SDP attributes:… Jonathan Lennox
- [AVT][MMUSIC] draft-lennox-mmusic-sdp-source-attr… Colin Perkins
- Re: [MMUSIC] Draft on source-specific SDP attribu… Colin Perkins
- RE: [MMUSIC] Draft on source-specific SDP attribu… Jonathan Lennox
- Re: [MMUSIC] Draft on source-specific SDP attribu… Colin Perkins