[rfc-dist] RFC 5583 on Signaling Media Decoding Dependency in the Session Description Protocol (SDP)

rfc-editor@rfc-editor.org rfc-editor at rfc-editor.org
Tue Jul 7 16:06:06 PDT 2009


A new Request for Comments is now available in online RFC libraries.

        
        RFC 5583

        Title:      Signaling Media Decoding Dependency in 
                    the Session Description Protocol (SDP) 
        Author:     T. Schierl, S. Wenger
        Status:     Standards Track
        Date:       July 2009
        Mailbox:    ts at thomas-schierl.de, 
                    stewe at stewe.org
        Pages:      18
        Characters: 40214
        Updates/Obsoletes/SeeAlso:   None

        I-D Tag:    draft-ietf-mmusic-decoding-dependency-08.txt

        URL:        http://www.rfc-editor.org/rfc/rfc5583.txt

This memo defines semantics that allow for signaling the decoding
dependency of different media descriptions with the same media type in
the Session Description Protocol (SDP).  This is required, for example,
if media data is separated and transported in different network streams
as a result of the use of a layered or multiple descriptive media coding
process.

A new grouping type "DDP" -- decoding dependency -- is defined, to be
used in conjunction with RFC 3388 entitled "Grouping of Media Lines in
the Session Description Protocol".  In addition, an attribute is
specified describing the relationship of the media streams in a "DDP"
group indicated by media identification attribute(s) and media format
description(s).  [STANDARDS TRACK]

This document is a product of the Multiparty Multimedia Session Control Working Group of the IETF.

This is now a Proposed Standard Protocol.

STANDARDS TRACK: This document specifies an Internet standards track
protocol for the Internet community,and requests discussion and suggestions
for improvements.  Please refer to the current edition of the Internet
Official Protocol Standards (STD 1) for the standardization state and
status of this protocol.  Distribution of this memo is unlimited.

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