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

J0578 (new late doc)

TBA – This contained a comparison of ALF complexity & gain to for 6-tap vs 8 tap MC. Review

JCTVC-J0579 BoG on miscellaneous limits [K. Chono (NEC), M. Zhou (TI)]

J0579 Bog on Limits

The BoG recommended adopting the 16-bit range constraint for both horizontal and vertical MVs. (JCTVC-J0225 and JCTVC-J0335.) Decision: Agreed.

Regarding the MVD, to avoid having a 17-bit range, it was suggested to specify modulo 2^16 operation for the interpretion for the MVD, and require MVD value from −2^15 to 2^15−1. Decision: Agreed.

The BoG recommended considering the DPB-size reduction (JCTVC-J0151) in the main session. No action taken.

The BoG recommended discussing the following constraints in the main session:

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  num_ref_idx_lx_active_minus1 constraint (JCTVC-J0151) No action taken.
  
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  Bounds on syntax elements excluding MV and DMV (JCTVC-J0335 and JCTVC-J0225). See below.
  
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  Slice/WPP/Tile number limit for specify the maximum number of CABAC reset operations (JCTVC-J0082). For further study.
  
  • 
    Issue for a tile case had been addressed by the other BoG.
    
  • 
    Discuss the necessity of a constraint for a WPP case.
    
  • 
    Discuss a unified constraint for slice and WPP in terms of maximum number of CABAC reset operations.
    
• 
  APS limit. No longer relevant.
  
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  Bit/bin constraint at LCU level (JCTVC-J0059, JCTVC-J0080, and JCTVC-J0151). Decision: Limit to 2x expansion in bits. Further study whether this should be lowered.
  
  • 
    J0059: Proposes to have a limit in terms of either of bits or bins.
    
  • 
    J0082: Proposes to have a limit in terms of bits.
    
  • 
    J0151: Proposes to have no level limit.
    

Some particular discussed elements are tabulated below.