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 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 to update RFC 2733 in the form of the ULP payload format - to investigate and if suitable develop a framework for advanced FEC codes and their usage for RTP, possibly with alignment to the RMT WG's FEC building block. - to extend RTP to work with Source-Specific Multicast sessions with unicast feedback - to provide a framing mechanism for RTP over TCP and TLS - in collaboration with the MPLS and ROHC WGs, to develop a solution for header compression of RTP across MPLS networks that avoid decompression and compression at each MPLS node. - to develop a new RTP profile as the combination of the SRTP profile and the Extended RTP Profile for RTCP-based Feedback (RTP/SAVPF) - to develop a new RTP profile for usage of TFRC (RFC 3448) with RTP over UDP to allow application developers to gain experience with TCP friendly congestion control. - to develop a MIB for RTCP XR (RFC 3611). - to update the RTP MIB, including aligning it with RFC 3550. 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.