Opened 5 years ago

Closed 5 years ago

#309 closed defect (fixed)

APS with same ID referenced from different slices

Reported by: ksuehring Owned by:
Priority: minor Milestone:
Component: spec Version: VVC D5 v10
Keywords: Cc: ksuehring, XiangLi, fbossen, jvet@…

Description

The slice header sematics have the following constraints:

When multiple ALF APSs with the same value of adaptation_parameter_set_id are referred to by two or more slices of the same picture, the multiple ALF APSs with the same value of adaptation_parameter_set_id shall have the same content.

and

When multiple LMCS APSs with the same value of adaptation_parameter_set_id are referred to by two or more slices of the same picture, the multiple LMCS APSs with the same value of adaptation_parameter_set_id shall have the same content.

On the other hand, the semantics of adaptation_parameter_set_id contains a note:

adaptation_parameter_set_id provides an identifier for the APS for reference by other syntax elements.
NOTE – APSs can be shared across pictures and can be different in different slices within a picture.

I think the first two (normative) references contain the design intent. The note should be corrected accordingly.

Change history (5)

comment:1 Changed 5 years ago by ksuehring

  • Component changed from VTM to spec

comment:2 Changed 5 years ago by bbross

  • Version changed from VVC D5 v7 to VVC D5 v8

comment:3 Changed 5 years ago by bbross

  • Version changed from VVC D5 v8 to VVC D5 v9

comment:4 Changed 5 years ago by bbross

  • Version changed from VVC D5 v9 to VVC D5 v10

comment:5 Changed 5 years ago by bbross

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

Fixed in D6 vC

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