id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
1345	AdaptiveQp activity calculation error	rikallen		"In TEncPreanalyzer::xPreanalyze(...) (TEncPreanalyzer.cpp)

The sum of luma sample values and squared values is accumulated for each quadrant of a 2Nx2N cu - so each accumulates over NxN values, but the average is then calculated by dividing through by ""uiNumPixInAQPart"" which counts values over the whole 2Nx2N.

i.e. - for a 16x16 Cu, the 4 sums are accumulated over 64 values each, but the average value is calculated by dividing by 256. This gives an incorrect value for the variance of the blocks. 

Possible fix - 

Delete "", uiNumPixInAQPart++"" in each of the 4 inner loops and insert at line 121

uiNumPixInAQPart = uiCurrAQPartWidth*uiCurrAQPartHeight/4;

"	defect	closed	minor		HM	HM-16.0	fixed		ksuehring davidf karlsharman jct-vc@…