Opened 8 years ago
Closed 8 years ago
#25 closed defect (fixed)
Encoder bugs in quantization when QTBT is enabled
| Reported by: | XiangLi | Owned by: | |
|---|---|---|---|
| Priority: | minor | Milestone: | HM-16.6-JEM-4.0 |
| Component: | JEM | Version: | HM-16.6-JEM-3.1 |
| Keywords: | Cc: | ksuehring, XiangLi, jvet@… |
Description
First, scaling list is not properly initialized for 128×128 transform. Second, error scale coefficients are not properly initialized for 2M×2N blocks when ((M+N)&0x01)≠0. Consequently, encoder sometimes makes incorrect rate-distortion decisions, which degrades overall coding performance. With the attached patch, 0.5+% luma BD-rate reduction is observed for RA, LD-B and LD-P without encoding time increase. (The issue is also reported in JVET-D0025.)
Attachments (1)
Change history (2)
Changed 8 years ago by XiangLi
comment:1 Changed 8 years ago by XiangLi
- Milestone set to HM-16.6-JEM-4.0
- Resolution set to fixed
- Status changed from new to closed
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Fixed in r300