Audio/Video Transport
charter-ietf-avt-07

Document Charter Audio/Video Transport WG (avt)
Title Audio/Video Transport
Last updated 2011-03-18
State Approved
WG State Concluded
IESG Responsible AD Robert Sparks
Charter Edit AD (None)
Send notices to (None)

Charter
charter-ietf-avt-07

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, along with its 
  associated profiles and payload formats.
  
  RTP itself has been shepherded to Full Standard. Its associated
  profiles, extensions, and payload formats are currently at various
  levels of stardards maturity. This working group's current work
  centers in four areas:
  
  1) Maintenance of the core RTP/RTCP protocols and the AVP, SAVP, AVPF, 
     and SAVPF profiles
  
  2) Specification and maintenance of payload formats for use with RTP
  
  3) Specification of metric blocks for use with the RTCP Extended Report 
     (XR) framework
  
  4) Extensions to the core protocols to facilitate joining,
     synchronizing, control, and monitoring of RTP multimedia
     sessions
  
  In these areas, the group is chartered to focus on the following
  tasks. Work supporting those areas, but not reflected in these
  tasks must not be accepted by the working group without an explicit
  re-chartering. In particular, new items supporting the fourth area
  are expected to be reviewed in DISPATCH before being considered new
  charter items for this group.
  
  1) Maintenance of the core RTP/SRTP/RTCP protocols
     and the AVP, SAVP, AVPF, and SAVPF profiles
     - maintain and enhance the SRTP Profile, with review and input
       from the Security Area
     - specify how to use Explicit Congestion Notification (ECN)
       with RTP/RTCP
     - continue to investigate the export of summarized RTP/RTCP
       information for operations and monitoring purposes
  
  2) Specification and maintenance of payload formats for use with RTP
     - provide guidelines for payload format design
     - develop payload formats for new media codecs
     - review and revise existing payload formats to advance those
       which are useful to Draft Standard or Standard, and to
       declare others as Historic.
  
  3) Specification of metric blocks for use with the
     RTCP Extended Report (XR) framework
     - provide a mechanism allowing identification data for
       a set of related metric reports to be carried separately
       and identified in those reports by reference
     - provide report blocks for delay, delay variation, and discard
     - provide report blocks for burst/gap discard and loss
     - provide report blocks supporting rapid synchronization
       of multiple RTP streams
     - provide report blocks for jitter buffer metrics
     - provide report blocks for loss concealment metrics
  
  4) Extensions to the core protocols to facilitate joining,
     synchronizing, control, and monitoring of RTP multimedia
     sessions
     - develop tools to support rapid acquisition of multimedia streams
     - specify necessary extensions to support rapid synchronization of 
       multiple RTP streams