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 tenth meeting during 11-20 July 2012 at the City Conference Centre (ccc), a k. a

JCTVC-J0489 Cross-check report for reference index coding (JCTVC-J0176) [S.H. Kim, A. Segall (Sharp)] [late]
JCTVC-J0297 AHG5:ref_idx coding [S.H. Kim, L. Kerofsky, A. Segall (Sharp)]

In HM-7.0, ref_idx requires 15 context coded bins in worst-case scenario. In order to improve the throughput efficiency, this contribution proposes a new binarization method combining truncated unary and fixed length coding (TUFLC). In the proposal, the first four bins are context coded and the remaining bins are bypass coded. It is asserted that the proposed method 1 and method 2 reduce the worst case number of context coded bins from 15 bins to 4 bins and 2 bins, respectively. It is also asserted that the proposed method reduces the worst case number of bins (both context coded and bypassed coded) from 15 bins to 8 bins.

Both methods use a new binarization.

Method 2 is similar (in terms of context coded bins and performance) to J0098. J0098 potentially uses more bypass bins (not under common test condition), but it is not evident that this would be critical.