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-J0349 AHG5/AHG6: Cross-verification of JCTVC-J0065 on SAO type index coding [K. Chono, K. Tokumitsu (NEC)] [late]
JCTVC-J0104 AHG6/AHG5: Fix and simplification for SAO type index [I. S. Chong, J. Sole, M. Karczewicz (Qualcomm), C.-M. Fu, Y.-W. Huang, S. Lei (MediaTek)]

In HM-7.0, SAO type index is coded using unary binarization. The first bin is coded with one context model, while all non-first bins are coded with another one. In this contribution, since the maximum value of SAO type index is 5, it is proposed to replace unary binarization with truncated unary binarization for SAO type index. It is also proposed to use bypass coding for all non-first bins of the truncated unary binarization for SAO type index. BD-rates are reportedly 0.0%/0.0%/0.0%/0.0% for Main-AI/RA/LB/LP respectively.

Uses truncated unary, on/off is context coded (no modification), other bins are bypass coded

No change in performance.

JCTVC-J0449 AhG5/6: Cross-check for SAO type coding using truncated unary and by-pass CABAC mode (JCTVC-J0104) [E.Alshina (Samsung)] [late]

Cross-checker mentions that by changing unary to truncated unary, it can be assumed that band type will potentially selected more frequently.

The cChange is simple.