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-J0379 Cross-check of JCTC-J0355 on coding of SAO merge left and merge up flags [C. Auyeung (Sony)] [late]

Comment from cross-checker: speed up encoder side since fewer variants should be tested

JCTVC-J0044 Encoder modification for SAO [E. Alshina, A. Alshin, J.H.Park, (Samsung)]

Recommendation of BoG: test other coding efficiency contributions on top of this (Recommendation of BoG: adopt s/w if combination results with 0139 are good). 0.2%

Decision (SW): Adopt.

JCTVC-J0173 Cross-check of J0044 on SAO encoder modification from Samsung [G. Laroche, T. Poirier, P. Onno (Canon)] [late]

Comment: test with other coding efficiency contributions.

JCTVC-J0097 Evaluation of picture-based SAO optimization in HM-7.0 [D.-K. Kwon, W.-S. Kim (TI)]

Reports the gain of picture based SAO optimization (not ctc) vs LCU based optimization, but results are not that good (compare to Sharp’s J0179). Seems fix provided by TI is not optimal.

Recommendation brought from BoG: Adopt (s/w) bug fix from J0097 (off by default)

Note: This fixes a bug in picture based optimization which is off by default. It is announced that volunteers intend to further improve this non-normative encoder-only tool within the next 3 months.

Decision (SW/BF): Adopt.

JCTVC-J0192 AHG6: Crosscheck of evaluation of picture-based SAO optimization in HM-7.0 in JCTVC-J0097 [C.-M. Fu, Y.-W. Huang (MediaTek)]

Comment: just bug fix, but doesn’t utilize all possibilities of picture based optimization

JCTVC-J0139 AhG6: SAO Parameter Estimation Using Non-deblocked Pixels [W.-S. Kim (TI)]

Modifies encoder only. Additionally to current design non-de-blocked pixels are taken into account during SAO parameters estimation.

Provides a gain (0.1%), more gain for small LCU (32x32 0,3% Y-BD-rate gain).

Should be tested with other coding efficiency contribution. Recommendation of BoG: Adopt s/w if combination results are good.

Analyze the code, combine with J0044 and run test for LCU 64x64 and 32x32 (Elena & Woo-Shik). Done.

Decision (SW): Adopt (as encoder option, default off)

JCTVC-J0391 AHG6: Crosscheck of SAO parameter estimation using non-deblocked pixels in JCTVC-J0139 [C.-M. Fu, Y.-W. Huang (MediaTek)] [late]

Requested to analyse the code.

JCTVC-J0213 AHG6: A threshold for SAO edge offset [T. Sugio, T. Matsunobu, T. Nishi (Panasonic)]

Changes pixel processing in SAO. Targets to visual quality.

−0.04% Y-BD-rate gain; 0,06% Chroma BD-rate (drop)

Adds complexity (condition check).

If possible set visual test in order to check whether problem exists or not. No action for current solution. Very low priority

JCTVC-J0365 Cross-check of Threshold for SAO Edge Offset in JCTVC-J0213 [W.-S. Kim (TI)] [late]