id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
214	remove transform reordering for 0.5Nx2N transform	xzheng		"At HM4, when 0.5Nx2N transform is used, 0.5Nx2N input array is reodered to 2Nx0.5N array, and then 2N-pt transform is done followed by 0.5N-pt transform at encoder side. At decoder side, 0.5N-pt inv-transform is done prior to 2N-pt inv-transform when 0.5Nx2N transform is used. After transformation, 2Nx0.5N output array is reordered to 0.5Nx2N array.

To be consistent with other transform processes, transform data reordering for 0.5Nx2N transform need to be removed. The attached is the files relate to the modification. 

After the removal of transform reordering, no impact on coding efficiency. The below is the results compared to HM4.

||	 ||Random Access HE||	|| ||
|| 	 ||Y||	U||	V||
||Class A||0.0%|| -0.1%||-0.1%||
||Class B||0.0%|| 0.0% ||0.0%||
||Class C||0.0%|| 0.0% ||0.0%||
||Class D||0.0%|| 0.1% ||0.0%||
||Class E||	||     ||    ||		
||Overall||0.0%||0.0%||0.0%||
||	 ||0.0%||0.0%||	0.0%||
||Enc Time[%]||	100%||     || ||
||Dec Time[%]||	101%||	   || ||


||	 ||Random Access LC||	|| ||
|| 	 ||Y||	U||	V||
||Class A||0.0%|| 0.1% ||0.0%||
||Class B||0.0%|| 0.0% ||0.1%||
||Class C||0.0%|| 0.0% ||0.0%||
||Class D||0.0%|| -0.1% ||0.0%||
||Class E||	||     ||    ||		
||Overall||0.0%||0.0%||0.0%||
||	 ||0.0%||0.0%||	0.0%||
||Enc Time[%]||	100%||     || ||
||Dec Time[%]||	100%||	   || ||

||	 ||Low delay B HE||	|| ||
|| 	 ||Y||	U||	V||
||Class A|||| ||||
||Class B||0.0%|| -0.2%||-0.1%||
||Class C||0.0%|| -0.1%||0.0%||
||Class D||0.0%|| 0.1% ||-0.2%||
||Class E||-0.1%||-0.1%||0.2% ||		
||Overall||0.0%||-0.1%||0.0%||
||	 ||0.0%||-0.1%||0.0%||
||Enc Time[%]||	100%||     || ||
||Dec Time[%]||	99%||	   || ||


||	 ||Low delay B LC||	|| ||
|| 	 ||Y||	U||	V||
||Class A|||| ||||
||Class B||0.0%||  0.0%|| 0.1%||
||Class C||0.0%||  0.0%||-0.1%||
||Class D||0.0%||  0.2%||-0.1%||
||Class E||0.0%||  0.1%||-0.1%||		
||Overall||0.0%||  0.1%||-0.1%||
||	 ||0.0%||  0.0%||-0.1%||
||Enc Time[%]||	100%||     || ||
||Dec Time[%]||	98%||	   || ||
"	defect	closed	major		HM	HM-4.0	fixed		fbossen ksuehring davidf jct-vc@…