Opened 9 years ago

Closed 9 years ago

#771 closed defect (fixed)

Clarify about formula of RefPicOrderCnt and LongTermRefPic

Reported by: vikingwang@… Owned by: bbross
Priority: minor Milestone: D9
Component: Text Version: D9 (K1003) v10
Keywords: LongTermRefPic, RefPicOrderCnt Cc: bbross, wjhan, jct-vc@…

Description

In subclause 8.5.3.1.7 of JCTVC-K0030_V3 (page 125), there's confusion about the formula for RefPicOrderCnt. We can update it as follows to make it more clear.

The original version:

The function RefPicOrderCnt( picX, refIdx, LX ) returns the picture order count PicOrderCntVal of the reference picture with index refIdx from reference picture list LX of the picture picX and is specified as follows.

RefPicOrderCnt( picX, refIdx, LX ) = PicOrderCnt(RefPicListX[refIdx] of the picture picX) (8 141)

The possible updated version:

The function RefPicOrderCnt( picX, pbX, refIdx, LX ) returns the picture order count PicOrderCntVal of the reference picture with index refIdx from reference picture list LX of the slice containing prediction block pbX in the picture picX and is specified as follows.
RefPicOrderCnt( picX, pbX, refIdx, LX ) = PicOrderCnt(RefPicListX[refIdx] of the prediction block pbX in the picture picX) (8-151)

The similar update for subclause8.5.3.1 (page 114)

The original version:

The function LongTermRefPic( picX, refIdx, LX ), with X being either 0 or 1, is defined as follows. If the picture with index refIdx from reference picture list LX of the picture picX was marked as "used for long term reference" at the time when picX was the current picture, LongTermRefPic( picX, refIdx, LX ) is equal to 1; otherwise LongTermRefPic( picX, refIdx, LX ) is equal to 0.

The possible updated version:

The function LongTermRefPic( picX, pbX, refIdx, LX ), with X being either 0 or 1, is defined as follows. If the picture with index refIdx from reference picture list LX of the slice containing prediction block pbX in the picture picX was marked as "used for long term reference" at the time when picX was the current picture, LongTermRefPic( picX, pbX, refIdx, LX ) is equal to 1; otherwise LongTermRefPic( picX, pbX, refIdx, LX ) is equal to 0.

Thanks a lot to Benjamin's kinldy help on the clarification for such confusion points.

Best regards.
Viking

Change History (5)

comment:1 Changed 9 years ago by DefaultCC Plugin

  • Cc bbross wjhan jct-vc@… added

comment:2 Changed 9 years ago by bbross

  • Milestone changed from D8 to D9
  • Version changed from D8 (K0030) v3 to D9 (K1003) v10

comment:3 Changed 9 years ago by bbross

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

comment:4 Changed 9 years ago by bbross

  • Resolution fixed deleted
  • Status changed from closed to new

comment:5 Changed 9 years ago by bbross

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

This has been fixed in JCTVC-K1003_v11.

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  • Benjamin Bross(Owner, Subscriber, Participant)
  • jct-vc@…(Subscriber)
  • karl.sharman@…(Always)
  • Karsten Suehring(Always)
  • vikingwang@…(Reporter)
  • Woo-Jin Han(Subscriber)