Opened 5 months ago

Closed 5 months ago

#307 closed defect (fixed)

DMVR subblock boundary is processed as subblock boudnary in deblocking filter

Reported by: chhuanb Owned by:
Priority: minor Milestone: VVC D5 v8
Component: spec Version: VVC D5 v7
Keywords: Cc: ksuehring, bbross, XiangLi, fbossen, jvet@…

Description

In "clause 8.5.1, step 5", NumSbX[ xCb ][ yCb ] and NumSbY[ xCb ][ yCb ] are set equal to numSbX and numSbY, which are used in clause "8.8.3.4 Derivation process of coding subblock boundary".

If the coding block applies DMVR, numSbX and numSbY might be greater than 1, and then clause 8.8.3.4 is applied for that coding block.

While in VTM5, only the subblock boundary of SbTMVP and affine coded block is filtered.

Change history (3)

comment:1 Changed 5 months ago by Kenneth

Thanks for reporting.
One approach to fix this is to check if inter_affine_flag or merge_subblock_flag are equal to 1 and only then set numSbX=NumSbX[xCb][yCb] and numSbY=NumSbY[xCb][yCb], otherwise set numSbX and numSbY to 1.

comment:2 Changed 5 months ago by bbross

  • Milestone set to VVC D5 v8

comment:3 Changed 5 months ago by bbross

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

Fixed in D5 v8

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