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Internal WG Review: Recharter of Audio/Video Transport (avt)
A new charter for the Audio/Video Transport (avt) Working Group in the Transport Area
of the IETF is being considered. The draft charter is provided below for your review
and comment.
Review time is one week.
The IETF Secretariat.
Audio/Video Transport (avt)
---------------------------
Last Modified: 2003-9-25
Current Status: Active Working Group
Chair(s):
Colin Perkins <csp@csperkins.org>
Magnus Westerlund <magnus.westerlund@ericsson.com>
Transport Area Director(s):
Allison Mankin <mankin@psg.com>
Jon Peterson <jon.peterson@neustar.biz>
Transport Area Advisor:
Allison Mankin <mankin@psg.com>
Mailing Lists:
General Discussion: avt@ietf.org
To Subscribe: avt-request@ietf.org
Archive: www.ietf.org/mail-archive/working-groups/avt/current/maillist.html
The Audio/Video Transport Working Group was formed to specify a
protocol for real-time transmission of audio and video over unicast
and multicast UDP/IP. This is the Real-time Transport Protocol, RTP,
together with its associated profiles and payload formats. The
current aims of the working group are:
- to advance the main RTP specification and RTP Profile
for Audio and Video Conferences with Minimal Control
for publication as full Internet Standards
- to review and revise existing payload formats to advance those
which are useful to Draft Standard, and to declare others
as Historic. Milestones will be established as a champion for
each payload format is identified.
- to develop payload formats for new media codecs, and to
document best-current practices in payload format design.
The group continues to be precluded from work on codecs
themselves because of overlap with the other standards
bodies, and because the IETF does not have the ability
to effectively review new codecs. An exception was made
for the freeware iLBC codec on a highly experimental basis,
but acceptance of new codec work is unexpected and subject
to rechartering.
- to complete the forward error correction work in the ULP and
UXP payload formats
- to extend RTP to work with Source-Specific Multicast sessions
with unicast feedback
- to provide a framing mechanism for RTP over TCP and TLS
- to review the applicability of Compressed RTP operation on
MPLS networks, developing extensions as necessary
- to develop a new RTP profile as the combination of the SRTP
profile and the Extended RTP Profile for RTCP-based Feedback
(RTP/SAVPF)
The group will also coordinate with the DCCP working group to
ensure that RTP can be efficiently transported over DCCP.
The longer term goals of the working group are to advance the
SRTP Profile, the Extended RTP Profile for RTCP-based Feedback,
the Compressed RTP framework, and the RTP MIB to Draft Standard.
The group has no plans to develop new RTP profiles beyond those
listed above, but will consider rechartering to produce profile
level extensions if appropriate.
Milestones:
Oct 2003 Review DCCP including prototypes and API; feedback to DCCP WG
Nov 2003 Initial draft requirements for ECRTP over MPLS; discuss with MPLS WG
Dec 2003 Submit UXP Payload Format for Proposed Standard
Dec 2003 Submit ULP Payload Format for Proposed Standard
Dec 2003 Submit RTCP/SSM draft for Proposed Standard
Dec 2003 Submit iLBC codec specification for Experimental
Dec 2003 Submit iLBC payload format for Proposed Standard
Jan 2004 Advance RTP specification and A/V profile to Full Standard
Mar 2004 Submit Framing of RTP for TCP and TLS for Proposed Standard
Mar 2004 Identify payload formats to classify as Historic
Mar 2004 Finish requirements for ECRTP over MPLS; recharter for subsequent work
Jul 2004 Submit RTP/SAVPF profile for Proposed Standard
Jul 2004 Begin update of SRTP profile for Draft Standard RFC
Jul 2004 Begin update of RTP/AVPF profile for Draft Standard RFC
Aug 2004 Consider update of RTP MIB
Nov 2004 Collect SRTP implementation reports
Nov 2004 Collect RTP/AVPF implementation reports
Mar 2005 Submit SRTP for Draft Standard
Mar 2005 Submit RTP/AVPF for Draft Standard