Opened 5 years ago

Closed 5 years ago

#831 closed defect (invalid)

alf_cc_cb_mapped coeff_abs and alf_cc_cb_mapped coeff_abs unbounded

Reported by: zhou Owned by:
Priority: minor Milestone:
Component: spec Version: VVC D7 vD
Keywords: Cc: ksuehring, bbross, XiangLi, fbossen, jvet@…

Description

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.

Change history (3)

comment:1 Changed 5 years ago by 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?

comment:2 Changed 5 years ago by zhou

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

comment:3 Changed 5 years ago by fbossen

  • Resolution set to invalid
  • Status changed from new to closed
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