id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
909	Confusion in whether coordinates are for luma or chroma samples	peterderivaz	bbross	"There seems to be a general confusion as to whether sample locations for blocks with cIdx>0 is given in luma or chroma samples.

The syntax elements seem to consistently use locations in luma samples, but the semantics are less clear. 

For example, 
in 8.4.4.1 ""General decoding process for intra blocks"", split_transform_flag is accessed via split_transform_flag[ xB0 << 1 ][ yB0 << 1 ][ trafoDepth ], implying locations in chroma samples.

however, in 8.4.4.2.1 ""General intra sample prediction"", equations 8-26 and 8-27 compute what is called ""the luma location"" (based on the same xB0 values), and use PredMode[xBN][yBN], implying locations in luma samples



"	defect	closed	trivial		Text	D9 (K1003) v11	fixed		bbross wjhan jct-vc@…