Opened 7 years ago

Closed 7 years ago

Last modified 7 years ago

#1323 closed defect (fixed)

No slice-protection for deltaQP

Reported by: karlsharman Owned by:
Priority: minor Milestone: HM-16.2
Component: HM Version: HM-14.0
Keywords: Cc: fbossen, ksuehring, davidf, jct-vc@…

Description

The software is missing slice protection for deltaQP prediction value.

See TComDataCU::getLastCodedQP, where there are checks if previous CTU (in encoding order) is from the same tile or wavefront-row, but not from the same slice. (There is also a problem regarding wavefronts+tiles). See Section 8.6.1 Derivation process for quantization parameters.

Affects decoder and encoder (and therefore no-mismatch noticed).

Change History (4)

comment:1 Changed 7 years ago by DefaultCC Plugin

  • Cc fbossen ksuehring davidf jct-vc@… added

comment:2 Changed 7 years ago by karlsharman

After further analysis, main problem case does not exist, but wavefronts+tiles still an issue.

comment:3 Changed 7 years ago by karlsharman

  • Resolution set to fixed
  • Status changed from new to closed

Fixed in r4099.

comment:4 Changed 7 years ago by ksuehring

  • Milestone changed from HM-17.0 to HM-16.2
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