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

5.15.3Last position coding

JCTVC-J0319 Further Unification of Luma/Chroma Context Derivation for Last Position Coding [L. Guo, M. Karczewicz, W.-J. Chien (Qualcomm)]

In HM7, equation-based context derivation is used for last significant position coding where Luma and Chroma components share the same equation but with different parameters (offset and shift). This contribution proposes to further unify last coding context derivation by using the same shift parameter for Luma and Chroma components. Experimental results reportedly show there is 0.0% Y-BD rate change under common test conditions.

In case of chroma coding, 2 additional contexts.

Still, luma and chroma are not yet exactly the same (only identical for value of n).

Benefit not obvious.

No action.

JCTVC-J0395 Cross check of Qualcomm’s proposal JCTVC-J0319 [J. Kim (LG)] [late]