id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
684	Misalignment between VTM and VVC draft for PDPC	hongbin		"In 8.4.5.2.14 Position-dependent intra prediction sample filtering process, nScale is calculated and is used.
In SW, PDPC is disabled when nScale is less than 0. However, in Spec, there is no such constraint, which is incorrect.

The variable nScale is derived as follows:
–	If predModeIntra is greater than INTRA_ANGULAR50, nScale is set equal to Min( 2, Log2( nTbH ) − Floor( Log2( 3 * invAngle − 2 ) ) + 8 ), using invAngle as specified in clause 8.4.5.2.12.
–	Otherwise, if predModeIntra is less than INTRA_ANGULAR18, nScale is set equal to Min( 2, Log2( nTbW ) − Floor( Log2( 3 * invAngle − 2 ) ) + 8 ), using invAngle as specified in clause 8.4.5.2.12.
–	Otherwise, nSacle is set to ( ( Log2( nTbW ) + Log2( nTbH ) − 2 )  >>  2 ).

shall be changed to

The variable nScale is derived as follows:
–	If predModeIntra is greater than INTRA_ANGULAR50, nScale is set equal to Min( 2, Log2( nTbH ) − Floor( Log2( 3 * invAngle − 2 ) ) + 8 ), using invAngle as specified in clause 8.4.5.2.12.
–	Otherwise, if predModeIntra is less than INTRA_ANGULAR18, nScale is set equal to Min( 2, Log2( nTbW ) − Floor( Log2( 3 * invAngle − 2 ) ) + 8 ), using invAngle as specified in clause 8.4.5.2.12.
–	Otherwise, nSacle is set to ( ( Log2( nTbW ) + Log2( nTbH ) − 2 )  >>  2 ).
'''If nScale is less than zero, this process is terminated.'''"	defect	closed	minor	VVC D7 vC	spec	VVC D7 vC	invalid		ksuehring bbross XiangLi fbossen jvet@…