Opened 13 months ago
Closed 13 months ago
#547 closed defect (duplicate)
Uncorrect pruning in derivation of spatial merging candidate
Reported by: | antoine.robert | Owned by: | |
---|---|---|---|
Priority: | minor | Milestone: | |
Component: | spec | Version: | VVC D6 vE |
Keywords: | Cc: | ksuehring, bbross, XiangLi, fbossen, jvet@… |
Description
In 8.5.2.3 Derivation process for spatial merging candidates, the pruning is:
- candidate B1 is pruned with A1
- candidate B0 is pruned with B1, A1
- candidate A0 is pruned with A1, B1, B0
- candidate B2 is pruned with A1, B1, B0, A0
But JVET-L0093 reduces it to:
- candidate B1 is pruned with A1
- candidate B0 is pruned with B1,
A1 - candidate A0 is pruned with A1,
B1, B0 - candidate B2 is pruned with A1, B1,
B0, A0
The corresponding lines of the spec should be removed as, for example with candidate A0:
– The variables availableFlagA0, refIdxLXA0, predFlagLXA0 and mvLXA0 are derived as follows:
– If one or more of the following conditions are true, availableFlagA0 is set equal to 0, both components of mvLXA0 are set equal to 0, refIdxLXA0 is set equal to −1 and predFlagLXA0 is set equal to 0, with X being 0 or 1, and bcwIdxA0 is set equal to 0:
– availableA0 is equal to FALSE.
– availableA1 is equal to TRUE and the luma locations (xNbA1, yNbA1) and (xNbA0, yNbA0) have the same motion vectors and the same reference indices.
– availableB1 is equal to TRUE, the luma locations (xNbB1, yNbB1) and (xNbA0, yNbA0) have the same motion vectors and the same reference indices and MergeTriangleFlag[xCb][yCb] is equal to 1.
– availableB0 is equal to TRUE, the luma locations (xNbB0, yNbB0) and (xNbA0, yNbA0) have the same motion vectors and the same reference indices and MergeTriangleFlag[xCb][yCb] is equal to 1.
Change history (2)
comment:1 Changed 13 months ago by LiZhang
comment:2 Changed 13 months ago by bbross
- Resolution set to duplicate
- Status changed from new to closed
Closed as duplicate of #344.
same as ticket #344. It seems the fixes haven't been integrated to VVC D6 vE.