id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
302	CBF flags syntax and semantics	chernyak		"CBF flags signalling in transform_unit has a typo in condition and doesn't cover implicit TU partitioning. Suggested modification:

if( ( IntraSubPartitionsSplitType == ISP_NO_SPLIT  &&  
   !( cu_sbt_flag  && ( ( subTuIndex  = = 0  &&  cu_sbt_pos_flag )  | | ( subTuIndex  = = 1  &&  !cu_sbt_pos_flag ) ) ) && 

  ((CuPredMode[ x0 ][ y0 ] [[span(style=color: #FF0000, == )]] MODE_INTRA | | tu_cbf_cb[x0 ][ y0 ] | | tu_cbf_cr[ x0 ][ y0 ] ) [[span(style=color: #FF0000, | | (CbWidth[ x0 ][ y0 ] >  MaxTbSizeY  | |  CbHeight[ x0 ][ y0 ] > MaxTbSizeY ) )]] ) )

| |

((IntraSubPartitionsSplitType != ISP_NO_SPLIT) && ( subTuIndex < NumIntraSubPartitions − 1  | |  !InferTuCbfLuma ) ) )


Semantics part doesn't cover all possible cases of tu_cbf_luma deriving. 
Suggested modification:

tu_cbf_luma[ x0 ][ y0 ] equal to 1 specifies that the luma transform block contains one or more transform coefficient levels not equal to 0. The array indices x0, y0 specify the location ( x0, y0 ) of the top-left luma sample of the considered transform block relative to the top-left luma sample of the picture.
When tu_cbf_luma[ x0 ][ y0 ] is not present in the current [[span(style=color: #FF0000, TU)]], its value is inferred as follows:
* [[span(style=color: #FF0000, If cu_sbt_flag is equal to 1 and any of the following conditions is true, tu_cbf_luma[ x0 ][ y0 ] is inferred to be equal to 0.)]]
 * [[span(style=color: #FF0000, subTuIndex is equal to 0 and cu_sbt_pos_flag is equal to 1;)]]
 * [[span(style=color: #FF0000, subTuIndex is equal to 1 and cu_sbt_pos_flag is equal to 0;)]]
* Otherwise, tu_cbf_luma[ x0 ][ y0 ] is inferred to be equal to 1.

The ""current CU"" to ""current TU"" change needs to be done also for the other TU cbfs as well.

"	defect	closed	minor	VVC D5 v8	spec	VVC D5 v7	fixed		ksuehring bbross XiangLi fbossen jvet@…