id	summary	reporter	owner	description	type	status	priority	component	version	resolution	keywords	cc
115	Rounding offsets for illumination compensation are missing in HEVCv3 spec.	parkmw	tech	"Rounding offsets for illumination compensation are missing in HEVCv3 spec.

There is a mismatch between HEVCv3 spec. and HTM16.2 software.
In HEVCv3 text, the rounding offsets, which are used to find the nearest integer pixel position, are missing in ""I.8.5.3.3.2.1 Derivation process for illumination compensation mode availability and parameters"". However, the HTM software has the rounding offsets.
During 3D-HEVC standardization, JCT-3V decided to use the rounding offsets.


Therefore, equations I-208 and I-209 in the HEVCv3 spec.
{{{
xRefBlkLX = xC + ( mvLX[ 0 ]  >>  ( 2 + ( cIdx ? 1 : 0 ) ) ) (I−208)
yRefBlkLX = yC + ( mvLX[ 1 ]  >>  ( 2 + ( cIdx ? 1 : 0 ) ) ) (I−209)
}}}
should be replaced by
{{{
xRefBlkLX = xC + ( ( mvLX[ 0 ] + ( cIdx ? 4 : 2 ) )  >>  ( 2 + ( cIdx ? 1 : 0 ) ) ) (I−208)
yRefBlkLX = yC + ( ( mvLX[ 1 ] + ( cIdx ? 4 : 2 ) )  >>  ( 2 + ( cIdx ? 1 : 0 ) ) ) (I−209)
}}}


"	text missing	new	major	3D-HEVC text	3D-HEVC Draft Text 7			tech jct-3v@…