Opened 4 years ago
Closed 4 years ago
#1309 closed defect (fixed)
BcwIdx used before it is assigned
| Reported by: | bheng | Owned by: | |
|---|---|---|---|
| Priority: | minor | Milestone: | |
| Component: | spec | Version: | VVC D10 vE |
| Keywords: | Cc: | ksuehring, bbross, XiangLi, fbossen, jvet@… |
Description
I believe all uses of the variable BcwIdx[ ][ ] occur before this variable is ever set.
Specifically, BcwIdx is not set until Eq 894, Section 8.5.6.1.
BcwIdx[ xSb + x ][ ySb + y ] = bcwIdx (894)
However, BcwIdx is used several times before 8.5.6.1 is invoked. And BcwIdx is even used earlier within 8.5.6.1 before Eq 894.
Change history (2)
comment:1 Changed 4 years ago by jlchen
comment:2 Changed 4 years ago by jlchen
- Resolution set to fixed
- Status changed from new to closed
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Good catch, Brian.
Basically, in the spec text, the value of BcwIdx[ xSb + x ][ ySb + y ] should be only used for the derivation of bcwIdx for future CU decoding, not for the decoding process of the current CU. Two places which use "BcwIdx[ xCb ][ yCb ] for decoding process should be replaced with local variable bcwIdx, which was derived before it's used.