alf_cc_cb_mapped coeff_abs and alf_cc_cb_mapped coeff_abs unbounded

[zhou]

In the spec text of the newly adopted CCALF (JVET-Q2001-v9), the values of CCALF filter coefficients are unbounded. Based on the meeting decision, the CCALF filter coefficients should be in the range of [-64:64]. It is suggested to add the following constraints:

1) in semantics of alf_cc_cb_mapped_coeff_abs[ k ][ j ], add

The value of alf_cc_cb_mapped_coeff_abs[ k ][ j ] shall be in the range of 0 to 7, inclusive.

2) in semantics of alf_cc_cr_mapped_coeff_abs[ k ][ j ], add

The value of alf_cc_cr_mapped_coeff_abs[ k ][ j ] shall be in the range of 0 to 7, inclusive.

[fbossen]

alf_cc_cb_mapped_coeff_abs and alf_cc_cr_mapped_coeff_abs are coded as u(3). That should be sufficient to bound them to 0..7?

[zhou]

yes, just realized that. So this case is invalid.