id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
1534	Intra reference sample subsitution process uses incorrect indexing (8.4.5.2.9)	swarrington		"Section 8.4.5.2.9 reference substition process has a bulleted list describing the process for handling when ""at least one but not all samples refUnfilt[ x ][ y ] are marked as ""not available for intra prediction"""".

There appears to be an error in bullet 2:
2.	For '''x = −1 − refIdx''', y = −( refH − 2 )..1 + refIdx, when refUnfilt[ '''−x''' ][ −y ] is marked as ""not available for intra prediction"", the value of refUnfilt[ '''−x''' ][ −y ] is set equal to the value of refUnfilt[ '''−x''' ][ −y + 1 ].

x is defined as the left boundary pixel position (x = -1-refIdx).  However, both the ""not available for intra prediction"" and substitution processes use ""-x"" indexing.  ie: after x is converted to -x, it is pointing within the TU rather than the intended left boundary.

I believe the intention is for all the indexing in this bullet to use ""x"" rather than ""-x""."	defect	closed	major		spec	VVC D10 vH	fixed		ksuehring bbross XiangLi fbossen jvet@…