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-J0410 Cross-check of J0170 on temporal and combined motion vector predictors derivation for merge/skip mode [T. Lee (Samsung)] [late]
JCTVC-J0145 Simplification on spatial AMVP candidate derivation [Y. Lin, J. Zheng (HiSilicon)]

This document proposes to simplify the derivation process of spatial AMVP candidates. Two spatial candidates are derived by checking non-scaled and scaled MV candidate based on left and above neighboring positions in HM7. It is proposed that two steps involved in the scaled MV candidate derivation are combined and only 3 neighboring positions are checked for the scaled MV candidate. It is asserted that the non-scaled MV candidate is always checked before the scaled one. The specification text is largely simplified. The test results show no loss of coding efficiency of RA-main: 0.0%, −0.1%, 0.0%, RA-HE10: 0.0%, 0.0%, 0.0%, LB-main: −0.1%, 0.0%, 0.0%, LB-HE10: 0.0%, −0.2%, −0.1% under common test conditions.

One comment:

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  Benefit not obvious, as the processing steps can anyway be done in parallel, and only one candidate is scaled.
  
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  Draft editor commented that at least one of the conditions may be confusing.
  
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  The proposal again introduces dependency between left and top candidates which was removed before
  

No support by other experts. No action.
JCTVC-J0158 Cross check of HiSilicon Technologies’ proposal JCTVC-J0145 [J. Kim (LGE)] [late]