International organisation for standardisation organisation internationale de normalisation

Coding results of the CE contribution G0100

G0100	Video 1	Video 2	Video/video BR	Video/total BR	Synthesized/total BR	Enc time	Dec time
minDoNBDV	-0.25%	-0.07%	-0.06%	-0.05%	-0.05%	100.0%	100.2%
Shift DV candidate	-0.12%	-0.05%	-0.04%	-0.04%	-0.04%	100.8%	100.6%

Question: When removing the condition for checking the shift DV candidate, how many operations are saved in the merge list construction? In a follow-up discussion on 01-14, it was reported by the proponents that the worst case is reduced by 30 condition checks by removing subclause H.8.5.3.2.15.

However, another expert expressed the opinion that in a proper implementation it should be at most 4 candidates that need not to be checked.

Further offline clarification between the proponents and the doubting expert was requested. The discussion did not lead to any agreements.

It was remarked that further options to improve the design, including removal of additional candidates such as bottom-right access, should be considered more thoroughly in the CE. It was agreed to further study this in the CE.

Test 3: Depth based block partitioning (Chaired by A. Vetro)

JCT3V-G0106: In the proposed method, an arbitrarily shaped block partitioning for the collocated texture block is derived based on a binary segmentation mask computed from the collocated (virtual) depth map. Each of the two partitions (resembling foreground and background) is motion compensated and afterwards merged based on the depth-based segmentation mask.