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

5.10Block structures and partitioning

5.10.1General

JCTVC-J0133 TU Depth Clean-up [Y. Chiu, P. Kapsenberg, W. Zhang, L. Xu, Y. Han, Z. Deng, X. Cai (Intel)]

It has been observed that there are two TU depth related issues in current HEVC text and software. Firstly, there’s no limitation to the values of maximum TU depths in SPS. Secondly, the derivation scheme of context index for split_transform_flag may result in unwanted context, which was reported in ticket #553. To clarify the usage of TU depth and ensure its correctness, this contribution proposes clean-up solutions for these issues.

First issue: Revisit Further discussed together with J0335.
Second issue (ticket #553): There is an issue with CNU. In principle, the ticket could be solved as editorial issue (avoiding use of undefined context by replacing CNU through CNT), but what is suggested here is to combine the solution of the ticket with a reduction by one context.

Decision: Adopt the suggested solution on the second issue.

JCTVC-J0359 Cross-check for JCTVC-J0133 TU Depth Clean-up [X. Zhang, O.C. Au (HKUST)] [late]
JCTVC-J0360 Cross-check of TU Depth Clean-up (JCTVC-J0133) [J. Xu (Microsoft)] [late]