id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
1079	Typo in derivation process of ctxInc for coeff_sign_flag	wangyang.cs		"A typo exists in JVET-R2001-vA:
To derive ctxInc for coeff_sign_flag, “== 0” is forgotten in the conditions in (1597) and (1598).

Suggest changes in JVET-R2001-vA as follows:

'''9.3.4.2.10 Derivation process of ctxInc for the syntax element coeff_sign_flag for transform skip mode'''
Inputs to this process are the colour component index cIdx, the luma location ( x0, y0 ) specifying the top-left sample of the current transform block relative to the top-left sample of the current picture, the current coefficient scan location ( xC, yC )
Output of this process is the variable ctxInc.
The variables leftSign and aboveSign are derived as follows: 
    leftSign = ( xC  = =  0 ) ? 0 : CoeffSignLevel[ xC − 1 ][ yC ]	(1594)
    aboveSign = ( yC  = =  0 ) ? 0 : CoeffSignLevel[ xC ][ yC − 1 ]	(1595)
The variable ctxInc is derived as follows:
  –	If leftSign is equal to 0 and aboveSign is equal to 0, or if leftSign is equal to  −aboveSign, the following applies: 
    ctxInc = ( BdpcmFlag[ x0 ][ y0 ][ cIdx ]  = =  0 ? 0 : 3 ) 	(1596)
  –	Otherwise, if leftSign is greater than or equal to 0 and aboveSign is greater than or equal to 0, the following applies: 
    ctxInc = ( BdpcmFlag[ x0 ][ y0 ][ cIdx ] [[span(style=color:#0000FF,  = =  0 )]] ? 1 : 4 ) 	(1597)
  –	Otherwise, the following applies:
    ctxInc = ( BdpcmFlag[ x0 ][ y0 ][ cIdx ] [[span(style=color:#0000FF,  = =  0 )]] ? 2 : 5 ) 	(1598)"	defect	closed	minor	VVC D7 vC	spec	VVC D8 vB	fixed		ksuehring bbross XiangLi fbossen jvet@… jvet@…