Opened 8 years ago
Closed 8 years ago
#34 closed defect (fixed)
intra-fast encoder-side decisions based on possibly incorrect obmc pred buffer
| Reported by: | gordon | Owned by: | |
|---|---|---|---|
| Priority: | minor | Milestone: | |
| Component: | JEM | Version: | HM-16.6-JEM-3.2 |
| Keywords: | obmc, intra-fast, encoder-side decisions | Cc: | ksuehring, XiangLi, jvet@… |
Description
Present in jem4.0 rc1.
In TEncCu::xCheckRDCostInter obmc is tried 'on', then 'off'. When it's tried 'off' it uses a different prediction buffer that is not saved in rpcTempCU. If this becomes the winning candidate after xCheckBestMode, this "wrong" prediction buffer is used in a later JVET_C0024_PBINTRA_FAST test in xCompressCU.
The attached patch seems to correct the problem, but needs to be verified.
Compression gain differences on 17-frame RA tests we've done show very small average differences, but with variations up to +/- 0.3%
Attachments (1)
Change history (2)
Changed 8 years ago by gordon
comment:1 Changed 8 years ago by XiangLi
- Resolution set to fixed
- Status changed from new to closed
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Fixed in r324.