Opened 3 years ago

Closed 3 years ago

#82 closed defect (fixed)

Zeroing-out of high frequency transform coefficients for large TUs (> 32x32) is missing in the spec

Reported by: zhou Owned by:
Priority: major Milestone: VVC D2 v7
Component: spec Version: VVC D2 v5
Keywords: Cc: ksuehring, bbross, XiangLi, fbossen, jvet@…

Description

According to the VTM2.0.1 and the related the reference software of adopted transform proposal, non-zero coefficients are kept only for the top-left 32x32 region of large TUs. Please refer to xTrMxN_EMT() in TrQuant.cpp of VTM2.0.1 for detail.

This zeroing-out can effectively reduce the intermediate buffer for 64x64 TUs by half.

Change history (4)

comment:1 Changed 3 years ago by bbross

  • Version set to VVC D2 v4

Can anyone provide draft text to align the spec with VTM?

comment:2 Changed 3 years ago by bbross

  • Version changed from VVC D2 v4 to VVC D2 v5

comment:3 Changed 3 years ago by bbross

  • Milestone set to VVC D2 v7

comment:4 Changed 3 years ago by bbross

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

fixed in VVC D2 v7

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