id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
1156	Temporal motion vector prediction	sivasree	siva sree	"in the section 8.5.3.2.7 of ITU-T H.265 (04/2013), derivation of bottom right block location is explained as below 

2. The bottom right collocated motion vector is derived as follows:
xColBr = xPb + nPbW (8-173)
yColBr = yPb + nPbH (8-174)

If yPb >> CtbLog2SizeY is equal to yColBr >> CtbLog2SizeY, yColBr is less than
pic_height_in_luma_samples, and xColBr is less than pic_width_in_luma_samples, the following
applies:
–
The variable colPb specifies the luma prediction block covering the modified location given by
( ( xColBr >> 4 ) << 4, ( yColBr >> 4 ) << 4 ) inside the collocated picture specified by colPic

so, here ( ( xColBr >> 4 ) << 4, ( yColBr >> 4 ) << 4 ) means  rounding off the collocated co-ordinates to the multiples of 16 
but its not happening in the implementation
"	defect	closed	minor	HM-12.1	HM	HM-11.0	invalid		fbossen ksuehring davidf jct-vc@…