Opened 5 years ago

Closed 5 years ago

#697 closed defect (fixed)

Mismatch of equation (8-1261) between VTM and spec

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

Description

In spec, equation (8-1261) is
avgVar[ x ][ y ] = varTab[ Clip3( 0, 15,

( sumOfHV[ x >> 2 ][ y >> 2 ] * ac[ x >> 2 ][ y >> 2 ] ) >> ( 3 + BitDepth ) ) ].

However, in VTM, when calling the method m_deriveClassificationBlk, the input shift is set as m_inputBitDepth[CHANNEL_TYPE_LUMA] + 4, which means
the value is right shifted by ( BitDepth + 4 ).

Suggest to align spec with VTM ( using BitDepth + 4 in (8-1261) ).

Change history (1)

comment:1 Changed 5 years ago by bbross

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

Thanks for reporting.

This will be fixed JVET-P2001-vD.

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