Colin Perkins

draft-ietf-avt-smpte292-video

IETF DataTracker: draft-ietf-avt-smpte292-video

• Ladan Gharai, Colin Perkins, Gary Goncher, and Allison Mankin, RTP Payload Format for Society of Motion Picture and Television Engineers (SMPTE) 292M Video, Internet Engineering Task Force, RFC 3497, March 2003. DOI:10.17487/RFC3497
• Ladan Gharai, Colin Perkins, Gary Goncher, and Allison Mankin, RTP Payload Format for SMPTE 292M Video (.txt|.pdf), Internet Engineering Task Force, December 2002, Work in progress (draft-ietf-avt-smpte292-video-08.txt).

• Expand security considerations and update references.

• (diff from previous version)
• Ladan Gharai, Colin Perkins, Gary Goncher, and Allison Mankin, RTP Payload Format for SMPTE 292M Video (.txt|.pdf), Internet Engineering Task Force, August 2002, Work in progress (draft-ietf-avt-smpte292-video-07.txt).

• Editorial fixes and clarifications in the overview of SMPTE 292M. Clarify rationale for extended sequence number, and expand RTCP considerations section to discuss this. Expand discussion of congestion control in Security Considerations.

• (diff from previous version)
• Ladan Gharai, Colin Perkins, Gary Goncher, and Allison Mankin, RTP Payload Format for SMPTE 292M Video (.txt|.pdf), Internet Engineering Task Force, June 2002, Work in progress (draft-ietf-avt-smpte292-video-06.txt).

• Expand description of SMPTE 292M, and note non-congestion controlled nature of the media. Update requirements for fragmentation within a pgroup, and of the start- and end-of-active video fields. Confirm that network byte order is used.

• (diff from previous version)
• Ladan Gharai, Colin Perkins, Gary Goncher, and Allison Mankin, RTP Payload Format for SMPTE 292M Video (.txt|.pdf), Internet Engineering Task Force, May 2002, Work in progress (draft-ietf-avt-smpte292-video-05.txt).

• Expand Abstract and Introduction, giving more details of the SMPTE 292M format and the scope of the draft. Expand design rationale. Introduce the pixel group (pgroup) concept, used to avoid fragmentation within the components of a group of related pixels when using certain colour sub-sampling modes. Optimise packing of payload header fields.

• (diff from previous version)
• Ladan Gharai, Gary Goncher, Colin Perkins, David Richardson, and Allison Mankin, RTP Payload Format for SMPTE 292M Video (.txt|.pdf), Internet Engineering Task Force, March 2002, Work in progress (draft-ietf-avt-smpte292-video-04.txt).

• Revise Abstract and Introduction. Note that Start of active video (SAV) and end of active video (EAV) signals SHOULD NOT be fragmented across packets; more clearly define fragmentation of sample pairs for different colour sub-samplings. Change required clock rate to 148500/1.001 Hz, to allow exact timing reconstruction without knowledge of the source format, and to give a unique timestamp for each 10 bit word. Add line number, field, and blanking interval data to the payload header. Update IANA considerations.

• (diff from previous version)
• Ladan Gharai, Gary Goncher, Colin Perkins, David Richardson, and Allison Mankin, RTP Payload Format for SMPTE 292M Video (.txt|.pdf), Internet Engineering Task Force, July 2001, Work in progress (draft-ietf-avt-smpte292-video-03.txt).

• Keep-alive, no content changes.

• (diff from previous version)
• Ladan Gharai, Gary Goncher, Colin Perkins, David Richardson, and Allison Mankin, RTP Payload Format for SMPTE 292M (.txt|.pdf), Internet Engineering Task Force, March 2001, Work in progress (draft-ietf-avt-smpte292-video-02.txt).

• Fix example of mapping media type parameters to SDP.

• (diff from previous version)
• Ladan Gharai, Gary Goncher, Colin Perkins, David Richardson, and Allison Mankin, RTP Payload Format for SMPTE 292M (.txt|.pdf), Internet Engineering Task Force, November 2000, Work in progress (draft-ietf-avt-smpte292-video-01.txt).

• Further extend the sequence number to 32 bits, to accommodate the high data rate. Clarify normative requirements. Remove Offset in Frame (can be inferred from the timestamp). Add RTCP considerations, media type registration, and mapping to SDP parameters.

This draft proposes an RTP payload format for transporting uncompressed HDTV content, as encapsulated in the SMPTE 292M standard. The RTP packet counter is extended to 32 bits to accommodate SMPTE 292M's 1.485Gb/s data rate. This work was conducted as part of the development of the UltraGrid high definition video conferencing system.