Opened 5 years ago

Closed 5 years ago

#569 closed defect (fixed)

RPR - Clipping unscaled MVs

Reported by: bheng Owned by:
Priority: minor Milestone: VTM-7.0
Component: VTM Version: VTM-6.1
Keywords: Cc: vzakharc, yuwenhe, jvet@…


The normal MV clipping clipMv( ) function should not be applied to RPR vectors that will later be scaled and clipped within the xPredInterBlkRPR( ) function. Clipping unscaled RPR vectors at just outside the unscaled picture boundary can end up referencing some pixels from inside the scaled picture border after MV scaling is applied.

Specifically, I believe the clipping applied in xPredInterUni( ) at the following line:

clipMv( mv[0],>lumaPos(),>lumaSize(), sps, *pu.cs->pps );

should be changed to something like this instead:

if(>slice->getScalingRatio( eRefPicList, iRefIdx ) == SCALE_1X ) {

clipMv( mv[0],>lumaPos(),>lumaSize(), sps, *pu.cs->pps );


Change history (3)

comment:1 Changed 5 years ago by bheng

  • Component changed from 360Lib to VTM
  • Version set to VTM-6.1

comment:2 Changed 5 years ago by bheng

Potential fixes for this issue are available in the following merge request:

comment:3 Changed 5 years ago by XiangLi

  • Milestone set to VTM-7.0
  • Resolution set to fixed
  • Status changed from new to closed
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