Opened 4 weeks ago

Last modified 3 days ago

#713 new defect

alf_chroma_num_alt_filters_minus1 unbounded

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

Description

In the current spec text, alf_chroma_num_alt_filters_minus1 is not restricted (coded in ue(v)) which leads to unlimited ALF APS size. Per the adoption of JVET-O0090 variant CE5-4.2, the maximum value of alf_chroma_num_alt_filters_minus1 should be set to 7. The proponents might want to confirm the design intent.

Suggested changes:

replace

alf_chroma_num_alt_filters_minus1 plus 1 specifies the number of alternative filters for chroma components.

with

alf_chroma_num_alt_filters_minus1 plus 1 specifies the number of alternative filters for chroma components. The value of alf_chroma_num_alt_filters_minus1 shall be in the range of 0 to 7, inclusive.

Change history (1)

comment:1 Changed 3 days ago by jlchen

up to 8 chroma ALF filters is agreed when the adoption was made. This will be fixed in next release.

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