Opened 9 years ago

Closed 9 years ago

#390 closed defect (invalid)

"Derivation process for luma intra prediction mode" mistake between HM and Document

Reported by: chenm003 Owned by:
Priority: minor Milestone:
Component: HM Version: HM-6.0
Keywords: Cc: fbossen, ksuehring, davidf, jct-vc@…

Description

In the function getIntraDirLumaPredictor(), we can look some code below:

uiIntraDirPred[0] = iLeftIntraDir;
uiIntraDirPred[1] = ((iLeftIntraDir + 29) % 32) + 2;
uiIntraDirPred[2] = ((iLeftIntraDir - 1 ) % 32) + 2;

But in the Document(H1003-v21):
candModeList[0] = candIntraPredModeA (8-24)
candModeList[1] = 2 + ( ( candIntraPredModeA − 2 − 1 ) % 32 (8-25)
candModeList[2] = 2 + ( ( candIntraPredModeA − 2 + 1 ) % 32 (8-26)

It looks HM-6.0 don't match to (8-25) and (8-26).

Change History (2)

comment:1 Changed 9 years ago by DefaultCC Plugin

  • Cc fbossen ksuehring davidf jct-vc@… added

comment:2 Changed 9 years ago by chenm003

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

Excuse me, here candModeList[0] and candModeList[2] are right, the candModeList[1] use +29 replace -3, because it is a Mod32 space operator.

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