Bugfix: Use picture header for checking presence of scaling list/matrix instead of SPS when disabling scaling matrix for LFNST.

Brian Heng authored 5 years ago and Karsten Suehring committed 5 years ago

  - Add picture header and related syntax changes.

Enable BDPCM for Chroma for 444.

Add a description of ChromaTS into the software manual.

- The 16x16 coeff. zero-out for DST-7/DCT-8 is made disabled in VTM when MTS is turned off according to the suggested fix in #447.
- This fix does not change CTC results.

in residual coding of transform coefficients.

Note: in VVC draft 6 "–	If intra_bdpcm_flag[ ][ ] is equal to 1, ctxInc is set equal to 1.", which was set equal to 4 in VTM5. This integration also implements this change, to align cbf ctx with VVC draft 6.

  - Previous fix broke dependent  quantization for the non-scaling list case.
  - Negative shift values are no longer set to zero, so the shift is applied repeatedly to the fixed invQScale value (g_invQuantScales) during each loop.

  - Fix bugs in N0280 - Transform skip residual coding.

Moonmo Koo authored 5 years ago and Frank Bossen committed 5 years ago

- Previous name: Reduced Secondary Transform (RST)
- The parameter, LFNST, should be added in cfg file for enabing LFNST, i.e. LFNST = 1

Merge branch 'N0280-ResidualCodingTransformSkip' of https://vcgit.hhi.fraunhofer.de/nguyen/VVCSoftware_VTM into N0280-ResidualCodingTransformSkip

- Harmonize coefficient group sizes of chroma TBs to those used in luma TBs
- For 2x4/4x2 chroma TBs, retain 2x2 CG size.