Cop3 VBR Activity Sub-group: The Pro-MPEG Forum originally created Code of Practice #3 (COP3) for CBR MPEG-2 Transport Streams over IP networks and a companion FEC mechanism. The Video Services Forum (VSF) continued working on this project when the Pro-MPEG Forum disbanded. The VSF completed the work, and served as the proponent of the work as it moved through the Society of Motion Picture and Television Engineers (SMPTE) standardization process. The resulting standards, SMPTE 2022-1 (FEC) and SMPTE 2022-2 (MPEG-2 TS to IP Mapping), are published on the SMPTE website.
The VSF identified a need for a similar mapping for Variable Bit Rate (VBR) applications. The COP3 VBR Activity Group focused on creating two standards – SMPTE 2022-3 for transport of Piecewise Constant MPEG-2 VBR as defined in the ISO-13818 MPEG Standard, and SMPTE 2022-4 for the transport of Non-Piecewise Constant MPEG-2 VBR. As with 2022-1 and -2, the VSF served as the proponent for these efforts. The resulting Standards (2022-3 and 2022-4) are available on the SMPTE website.
This group concluded its work, and the VSF Board terminated the Activity Group during April, 2012.