Opened 5 years ago
Closed 5 years ago
#752 closed defect (fixed)
Incorrect constraint for sps_ref_wraparound_enabled_flag
| Reported by: | jiechen | Owned by: | |
|---|---|---|---|
| Priority: | minor | Milestone: | |
| Component: | spec | Version: | VVC D7 vE |
| Keywords: | wrap around motion compensation | Cc: | ksuehring, bbross, XiangLi, fbossen, jvet@… |
Description
In VVC draft7 vE,the semantics of sps_ref_wraparound_enabled_flag is as follows.
sps_ref_wraparound_enabled_flag equal to 1 specifies that horizontal wrap-around motion compensation is applied in inter prediction. sps_ref_wraparound_enabled_flag equal to 0 specifies that horizontal wrap-around motion compensation is not applied. When the value of ( CtbSizeY / MinCbSizeY + 1) is less than or equal to ( pic_width_in_luma_samples / MinCbSizeY − 1 ), where pic_width_in_luma_samples is the value of pic_width_in_luma_samples in any PPS that refers to the SPS, the value of sps_ref_wraparound_enabled_flag shall be equal to 0.
Here "the value of ( CtbSizeY / MinCbSizeY + 1) is less than or equal to ( pic_width_in_luma_samples / MinCbSizeY − 1 )" should be "the value of ( CtbSizeY / MinCbSizeY + 1) is larger than ( pic_width_in_luma_samples / MinCbSizeY − 1 )", since wrap around MC can only be enabled when ( CtbSizeY / MinCbSizeY ) + 1 <= ( pic_width_in_luma_samples / MinCbSizeY ) − 1
Change history (1)
comment:1 Changed 5 years ago by yk
- Resolution set to fixed
- Status changed from new to closed
Thanks! Will be fixed in JVET-Q2001-vA.