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-J0328 AHG5: Cross-check of reduction of context bins and bypass bins grouping for cu_qp_delta (JCTVC-J0226) [V. Sze (TI)] [late]

Confirms that the results match. Different versions are trading off throughput versus efficiency.

JCTVC-J0298 AHG5:cu_qp_delta coding [S. H. Kim, L. Kerofsky, A. Segall (Sharp)]

In HM-7.0, cu_qp_delta requires up to 26 and 32 context coded bins in main profile and HE_10 configuration, respectively. In order to improve the throughput efficiency, this contribution proposes a new efficient binarization method by combining truncated unary and fixed length coding (TUFLC). Only a predefined number (cMax) of bins are context coded and the rest of the bins are bypass coded. It is reported that the proposed method reduces the worst case number of context coded bins from 26 (or 32 in HE_10)bins to 4 bins. Moreover, it is reported that the total number of bins are reduced from 17 (or 33 in HE10) to 16 bins for all condition. The complexity reduction results in a BD-rate change from −0.02% to 0.02% on average in AHG5 common test conditions that is asserted to be negligible.

Comparably low loss (compared to other methods).

One benefit is that the length of the code is limited (unlike EG code).

JCTVC-J0506 Cross-check of high throughput binarization for cu_qp_delta coding (JCTVC-J0298) [J. Chen(Qualcomm)] [late] [miss]

Also related: One of the methods proposed in JCTVC-J0194 (see below).