id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
678	JVET-P1026 - DST-7/DCT-8 TUs with coefficients outside 16x16 region	bheng		"I assume it is still intended that MTS (DST-7/DCT-8) TUs are not allowed to have coefficients outside the lowest frequency 16x16 region.  Is that correct?

And I believe the MtsZeroOutSigCoeffFlag  was intended to prevent MTS when any luma coefficients are outside this region.  Specifically, this condition.

  ( LastSignificantCoeffX > 15  | |  LastSignificantCoeffY > 15 ) 


However, it fails to do so. There can be many coefficients after (15,15) in diagonal scan order that are outside the 16x16 region.  

Each coefficient group would have to be checked individually for this to work right.  Using LastSignificantCoeff alone is not enough."	defect	closed	minor		spec	VVC D7 vB	fixed		ksuehring bbross XiangLi fbossen jvet@…