Opened 12 days ago

Closed 8 days ago

#673 closed defect (fixed)

Mismatch on MMVD range

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

Description

There is a mismatch between the spec text and the software on the clipping range in the merge MVD derivation process.

In the spec text, mMvdLX is clipped to the range of [-215, 215 - 1].
In VTM, it is clipped to the range of [-217, 217 - 1].
Since the MVD range was extended to [-217, 217 - 1], extending the MMVD range seems to make sense.

Therefore, it is suggested to change the clipping range from [-215, 215 - 1] to [-217, 217 - 1] of Eq.(8-382), (8-383), (8-392) and (8-393) (in 8.5.2.7 Derivation process for merge motion vector difference).

Change history (1)

comment:1 Changed 8 days ago by bbross

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

Thanks for reporting.

This will be fixed JVET-P2001-vC.

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