Reducing max number of ALF APSs from 32 to 8

According to meeting notes: • What are the maximum numbers of matrix and ALF APSs that may be needed? Decision: 8. On Friday 12 July at 0830 it was noted that all APS IDs are currently drafted as u(5). Decision: It was agreed to continue to use 5 bits in the APS syntax but in the SH to use only 3 for ALF and QM and 2 for LMCS APS indexes, and to restrict the value range allowed in the APS semantics correspondingly. The text may need editorial clarification that the APSs IDs in different APS types have separate value spaces. • What is the maximum number of APSs for each type that may need to be referred to by slices of one picture? Decision: 1 for QMs, 1 LMCS (see next item), 8 ALF.