Opened 12 years ago

Closed 12 years ago

#463 closed defect (duplicate)

Text / HM mismatch for derivation of QP in deblocking processes

Reported by: kchono Owned by: bbross
Priority: minor Milestone: WD6
Component: Text Version: D6 (H1003) dI/dJ/dK
Keywords: Cc: bbross, wjhan, jct-vc@…


The CD text misses the "0" QP setting for I_PCM regions. Instead, qPL is set equal to 0 if q0,0 is coded by I_PCM. Attachment is a suggested text that fixes the current CD text bug and aligns it with HM software. The suggested text also solves the issues in Ticket 441.

Attachments (1)

20120405-kchono.doc (66.5 KB) - added by kchono 12 years ago.

Download all attachments as: .zip

Change History (4)

comment:1 Changed 12 years ago by DefaultCC Plugin

  • Cc bbross wjhan jct-vc@… added

Changed 12 years ago by kchono

comment:2 Changed 12 years ago by bbross

The fix introduces the luma/chroma QP mapping table from AVC to derive QPUV. Currently this table is missing in "8.6.1 Derivation process for quantization parameters" and should be added there to derive QPCb and QPCr. QPCb and QPCr should be used in deblocking instead. As mentioned, this relates to ticket 441.

Furthermore it solves the following items from the open issues list in the draft:

  • The variable qPL used in deblocking filter process has to be defined by, e.g. setting it to QPY.
  • The Chroma QP should be considered in chroma edge filtering instad of luma QP.

comment:3 Changed 12 years ago by bbross

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

Closed as duplicate of #492.

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  • Benjamin Bross(Owner, Subscriber, Participant)
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  • Keiichi Chono(Reporter)
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