Opened 2 years ago

Closed 5 weeks ago

#1426 closed defect (wontfix)

split_cu_flag specifies whether a coding quadtree is split into coding quadtrees.

Reported by: Owned by:
Priority: minor Milestone:
Component: Text Version: RExt D7 (Q1005) v8
Keywords: Cc: bbross, wjhan, jct-vc@…


In " Coding quadtree semantics" (pp.100 in H.265-201504),

split_cu_flag[ x0 ][ y0 ] specifies whether a coding unit is split into coding units with ...

Even though the coding unit is what the syntax wants to describe,
split_cu_flag is for a coding quadtree and the resulting leaf (if any) is a coding unit.

So, I think that it should be changed to

split_cu_flag[ x0 ][ y0 ] specifies whether a coding quadtree is split into coding quadtrees with ...


Change History (1)

comment:1 Changed 5 weeks ago by bbross

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

The coding quadtree is the whole tree structure that splits the CTU into CUs. Hence saying that a quadtree is split into coding quadtrees is ambiguous as well and would not improve the current wording. Splitting a CU into four CUs would turn that CU into a coding quadtree node while not splitting would let the CU become a leaf and remain a CU. Although the wording might not be ideal, we cannot think of a better wording so we suggest to keep the current one and close the ticket without an action.

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  • Benjamin Bross(Subscriber, Participant)
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