id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
235	N0280 – Transform Skip Residual Coding	bheng		"1.) The following context derivation for the TS significant coefficient group flag seems to be off by 1.

{{{
  unsigned  sigLeft   = unsigned( int( CGPosX - 1 ) > 0 ? ...
  unsigned  sigAbove  = unsigned( int( CGPosY - 1 ) > 0 ? ...
}}}

Specifically, ( CGPosX - 1 ) > 0 and ( CGPosY - 1 ) > 0.  Shouldn’t these just be CGPos > 0?   As it is now, this code ignores the first row/column of context.


2.) The following quantization selection logic (dependent quant vs. regular quant) for mtsIdx ==1 should only apply to luma, not chroma.  
{{{
    if( tu.cs->slice->getDepQuantEnabledFlag() && tu.mtsIdx != 1 )
}}}"	defect	closed	minor		VTM	VTM-4.2	fixed		ksuehring XiangLi fbossen jvet@…