id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
75	Bottom and right boundary partition issue	hangao	bbross	"'''Problem:'''
For bottom boundary ( y0 + cbHeight > pic_height_in_luma_samples, x0 + cbWidth <= pic_width_in_luma_samples) and '''cbSize is smaller then MinQTSizeY''' case: 

allowSplitBtHor  and allowSplitBtVer are both true, because of the the condition below in 6.4.1 is false:
-perpCbPos + perpCbSize is greater than perpMaxPicSize and '''cbSize is greater than MinQtSizeY'''

if both of allowSplitBtHor and allowSplitBtVer are true. mtt_split_cu_vertical_flag is present, which should not be present in this case. The same problem will happen in right boundary and cbSize is smaller then MinQTSizeY case.

'''Fix:'''
Reform the allowBtSplit conditions in 6.4.1 as follow to fix the problem and that make sure corner case is correct.


The variable allowBtSplit is derived as follows:
–If one or more of the following conditions are true, allowBtSplit is set equal to FALSE:
 –cbSize is less than or equal to MinBtSizeY
 –cbWidth is greater than MaxBtSizeY
 –cbHeight is greater than MaxBtSizeY
 –mttDepth is greater than or equal to MaxMttDepth + depthOffset
 ~~–perpCbPos + perpCbSize is greater than perpMaxPicSize and cbSize is greater than MinQtSizeY~~
~~–Otherwise if all of the following conditions are true, allowBtSplit is set equal to FALSE~~
 ~~–btSplit is equal to SPLIT_BT_VER~~
 ~~–x0 + cbWidth is greater than pic_width_in_luma_samples~~
 ~~–y0 + cbHeight is greater than pic_width_in_luma_samples~~
'''–Otherwise if all of the following conditions are true, allowBtSplit is set equal to FALSE:'''
 '''–btSplit is equal to SPLIT_BT_VER'''
 '''–y0 + cbHeight is greater than pic_height_in_luma_samples'''
'''–Otherwise if all of the following conditions are true, allowBtSplit is set equal to FALSE:'''
 '''–btSplit is equal to SPLIT_BT_HOR'''
 '''–x0 + cbWidth is greater than pic_width_in_luma_samples'''
 '''–y0 + cbHeight is smaller than or equal to pic_height_in_luma_samples'''
–Otherwise if all of the following conditions are true, allowBtSplit is set equal to FALSE:
 –mttDepth is greater than 0
 –partIdx is equal to 1
 –MttSplitMode[ x0 ][ y0 ][ mttDepth − 1 ] is equal to parallelTtSplit
–Otherwise, allowBtSplit is set equal to TRUE.




"	defect	closed	minor	VVC D2 v6	spec	VVC D2 v5	fixed	boundary partition	ksuehring bbross XiangLi fbossen jvet@…