Opened 5 years ago
Closed 5 years ago
#319 closed defect (fixed)
IBC BV range description
| Reported by: | yuhan | Owned by: | |
|---|---|---|---|
| Priority: | minor | Milestone: | VVC D5 v9 |
| Component: | spec | Version: | VVC D5 v10 |
| Keywords: | IBC | Cc: | ksuehring, bbross, XiangLi, fbossen, jvet@… |
Description
The description of IBC BV range is not very accurate.
– The motion vector mvL shall point to a reference block that is fully contained in the same coding tree block as the current block or fully contained in a block to the left with the same height of the current coding tree block and a width equal to 128 luma samples, i.e. all of the following conditions shall be true:
The problem is the fixed number of 128. The equations list here are trying to reflect the description above.
xRefTL >> CtbLog2SizeY >= ( xCb >> CtbLog2SizeY ) + Min( 1, 7 − CtbLog2SizeY ) (8 893)
− ( 1 << ( (7 − CtbLog2SizeY ) << 1) ) )
xRefBR >> CtbLog2SizeY <= ( xCb >> CtbLog2SizeY ) (8 894)
As you can see, the width is actually defined by + Min( 1, 7 − CtbLog2SizeY )-( 1 << ( (7 − CtbLog2SizeY ) << 1) ) ), instead of 128 luma samples.
Change history (4)
comment:1 Changed 5 years ago by bbross
- Version changed from VVC D5 v8 to VVC D5 v9
comment:2 Changed 5 years ago by bbross
- Version changed from VVC D5 v9 to VVC D5 v10
comment:3 Changed 5 years ago by bbross
comment:4 Changed 5 years ago by bbross
- Resolution set to fixed
- Status changed from new to closed
Fixed in D6 vC
Fixed in D6 vC