id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
771	Clarify about formula of RefPicOrderCnt and LongTermRefPic	vikingwang@…	bbross	"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
"	defect	closed	minor	D9	Text	D9 (K1003) v10	fixed	LongTermRefPic, RefPicOrderCnt	bbross wjhan jct-vc@…