Opened 5 years ago
Closed 5 years ago
#415 closed defect (fixed)
Chroma QP offset in loop filter
| Reported by: | adarsh | Owned by: | |
|---|---|---|---|
| Priority: | minor | Milestone: | |
| Component: | spec | Version: | |
| Keywords: | Cc: | ksuehring, bbross, XiangLi, fbossen, jvet@… |
Description
Under discussion of JVET-O0650, it was agreed to apply the chroma offsets after the mapping table. This was implemented in QP derivation for chroma, but missed in the loop filter QP derivation.
Current Spec.:
qPi = Clip3( 0, 63, ( ( QpQ + QpP + 1 ) >> 1 ) + cQpPicOffset ) (8-1132)
QpC = ChromaQpTable[ cIdx − 1 ][ qPi ] (8-1133)
It should be:
qpi = ChromaQpTable[ cIdx − 1 ][ ( QpQ + QpP + 1 ) >> 1 ) ] (8-1132)
qPi = Clip3( 0, 63, qpi + cQpPicOffset ) (8-1133)
Change history (2)
comment:1 Changed 5 years ago by bbross
comment:2 Changed 5 years ago by bbross
- Resolution set to fixed
- Status changed from new to closed
Confirmed by Adarsh, ticket can be closed.
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Is this still an issue after adoption of JVET-P1001?
"Non-CE5: Chroma QP derivation fix for deblocking filter (Combination of JVET-P0105 and JVET-P0539)"