Opened 8 months ago

Closed 6 months ago

#708 closed defect (fixed)

mismatch on BDPCM luma/chroma context indices between VTM7 and spec

Reported by: gordon Owned by:
Priority: minor Milestone:
Component: spec Version: VVC D7 vE
Keywords: Cc: ksuehring, bbross, XiangLi, fbossen, jvet@…

Description

BDPCM uses a flag and direction for its activation for luma (intra_bdpcm_luma_flag and intra_bdpcm_luma_dir_flag) and for chroma (intra_bdpcm_chroma_flag and intra_bdpcm_chroma_dir_flag).

The spec indicates that there are separate contexts used for this signaling between luma and chroma, although in the software the same contexts are used for both.

The WD should remove the chroma-related contexts (tables 9-71 and 9-72), and indicate that the currently luma-related contexts are used for all (tables 9-64 and 9-65 -- with appropriate changes in the high level association table 9-48).

Change history (2)

comment:1 Changed 8 months ago by bbross

  • Version changed from VVC D7 vD to VVC D7 vE

comment:2 Changed 6 months ago by bbross

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

Thanks for reporting!

This has been solve by SW adoption at the last meeting:
Decision(CTC+BF/SW): Adopt JVET-Q0785 (the SW includes bug fixes JVET-Q0110 and JVET-Q0351)

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