Opened 5 years ago
Closed 5 years ago
#1001 closed defect (invalid)
Wrong clipping ranges in formulas (355) and (356) defining the number of available neighbouring chroma samples numSampT and numSampL for CCLM
| Reported by: | afilippov | Owned by: | |
|---|---|---|---|
| Priority: | minor | Milestone: | |
| Component: | spec | Version: | |
| Keywords: | Cc: | ksuehring, bbross, XiangLi, fbossen, jvet@… |
Description
VVC D8 vE (JVET-Q2001-vE) specifies the number of available neighbouring chroma samples numSampT and numSampL for CCLM as follows:
numSampT = ( availT && predModeIntra = = INTRA_T_CCLM ) ?
( nTbW +Min( numTopRight, nTbH ) ) : 0 (355)
numSampL = ( availL && predModeIntra = = INTRA_L_CCLM ) ?
( nTbH +Min( numLeftBelow, nTbW ) ) : 0 (356)
To match with VTM-8.0, these formulas should be modified as follows:
numSampT = ( availT && predModeIntra = = INTRA_T_CCLM ) ?
( nTbW +Min( numTopRight, nTbW ) ) : 0 (355)
numSampL = ( availL && predModeIntra = = INTRA_L_CCLM ) ?
( nTbH +Min( numLeftBelow, nTbH ) ) : 0 (356)
Change history (2)
comment:1 Changed 5 years ago by wangyang.cs
comment:2 Changed 5 years ago by afilippov
- Resolution set to invalid
- Status changed from new to closed
Yes, you're right. Thank you!
Hi,
I think the VVC text (JVET-Q2001-VE) matches with VTM-8.0 for (355) and (356).
In VTM-8.0, the corresponding codes for (355) and (356) are in xGetLMParameters().
Best Regards,
Yang Wang