The Joint Collaborative Team on Video Coding (jct-vc) of itu-t wp3/16 and iso/iec jtc 1/sc 29/wg 11 held its second meeting during 21-28 July, 2010 at the itu-t premises in Geneva, ch

JCTVC-B071 [T. Yoshino, S. Naito, S. Sakazawa (KDDI)] Refinement of skip coding mode for HEVC

As the inter coding scheme in AVC, the "skip" coding mode is effective as well as Inter16x16 mode especially under low bit rate condition. As the result of macroblock (MB) basis coding mode decision based on R-D optimization criteria, those two modes are frequently selected under the low bit rate condition because the R-D optimal point locates between those two candidates on the approximated R-D curve.

This contribution introduces an additional coding mode for P-picture based on extending conventional skip mode in order to improve coding performance for high resolution video. From experimental result, it was reported that an average bit rate reduction for IpPpP coding of 2.2% and 3.6% was achieved for the coding of all available sequences and for the coding of the HD sequences (1080p and 720p), respectively.

Remark: Seems like just an entropy coding alternative representation of zero motion vector delta with residual. Can analyze this as an entropy coding difference, and perhaps as a different way to decide what to do.

Further study was encouraged to determine where this gain is coming from, since that is not clear at present.