N0470 – SMVD with mvd_l1_zero_flag

[bheng]

N0470 aims to align the software with the text for the case of SMVD with mvd_l1_zero_flag=1. Unless I’m mistaken, the text checks the mvd_l1_zero_flag condition first, and only generates the symmetric MVD if the mvd_l1_zero_flag condition is not met.

Therefore, when mvd_l1_zero_flag applies, the SMVD code should set the List1 MVD to (0,0). However, the code below is still setting the symmetric MVD.

  if ( pu.cu->smvdMode )
  {
    ...
    pu.mvd[1 - eCurRefList].set( -pu.mvd[eCurRefList].hor, -pu.mvd[eCurRefList].ver );
    ...
  }

I believe the line above should set the MVD to (0,0) if the mvd_l1_zero_flag condition applies.

[bheng]

Software coordinators requested that we leave this code as is and fix the text with a proposal at next meeting.

See discussion in merge request:
​https://vcgit.hhi.fraunhofer.de/jvet/VVCSoftware_VTM/merge_requests/513