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-J0431 Cross-check of: "Sign data hiding simplification" (J0099) [A. Gabriellini, M. Mrak, M. Naccari (BBC)] [late]

Cross-checker supports method 2

JCTVC-J0377 Cross-check of JCTVC-J0099 on sign data hiding simplification [C. Auyeung (Sony)] [late]
JCTVC-J0274 Parity Inference [J. Wang, D. He, X. Yu, G. Martin-Cocher (RIM)]

This proposal describes a technique to infer the parity of the first quantized coefficient in a coefficient group. In common test conditions, experimental results based on HM7.0 reference software show that the average Luma BD-rates are (−0.28%, −0.31%, −0.30%, −0.58%, −0.41%, −0.31%) in (AI-Main, RA-Main, LD-Main, AI-HE10, RA-HE10, LD-HE10) settings with RDOQ off, and (−0.22%, −0.10%, −0.10%, −0.62%, −0.50%, −0.65%) with RDOQ on. Note that the results include rotation of residual block in transform skipping as detailed in JCTVC-J0093, which affects HE10 test conditions. The method also reduces the maximum number of context-coded bins in a coefficient group from 25 to 24.

Comments:

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  Depending on the parity inference, the parsing of GT1 flag may be skipped. Does this mean that parsing can no longer be performed independent?
  
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  Is it really a simplification?
  
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  Comment by text editor: Seems to be difficult to integrate
  
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  Encoding and decoding time increased (confirmed by cross-checker)
  

No action.

JCTVC-J0405 Cross check of Parity Inference (JCTVC-J0274) [T. Ikai, T. Tsukuba (Sharp)] [late]