Opened 8 years ago

Closed 8 years ago

#95 closed defect (fixed)

Temporal layer bitstream constraints

Reported by: Vadim Owned by: jlchen
Priority: minor Milestone:
Component: SHVC text and test model Version:
Keywords: Cc: jlchen, yanye, jillboyce, jct-vc@…

Description

There are the following constraints defined in the semantics of inter_layer_pred_layer_idc[i].

It is a requirement of bitstream conformance that for each value of i in the range of 0 to NumActiveRefLayerPics − 1, inclusive, either of the following two conditions shall be true:

  • The value of max_tid_il_ref_pics_plus1[ LayerIdxInVps[ RefPicLayerId[ i ] ] ][ LayerIdxInVps[ nuh_layer_id ] ] is greater than TemporalId.
  • The values of max_tid_il_ref_pics_plus1[ LayerIdxInVps[ RefPicLayerId[ i ] ] ][ LayerIdxInVps[ nuh_layer_id ] ] and TemporalId are both equal to 0 and the picture in the current access unit with nuh_layer_id equal to RefPicLayerId[ i ] is an IRAP picture.

It seems that highlighted temporal Id should be temporal Id of the reference layer picture rather than the current picture TemporalId.

Change history (1)

comment:1 Changed 8 years ago by jlchen

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

The temporal Id of the current picture and the reference picture are same so the current specification does not have problem.
Also, during offline discussion, it was found that conformance condition has already checked in equation F 51. While it’s OK to keep those sentences regarding conformance in the specification to make people be aware of them.

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  • Gerhard Tech(Always)
  • jct-vc@…(Subscriber)
  • Jianle Chen(Owner, Subscriber, Participant)
  • Jill Boyce(Subscriber)
  • Karsten Suehring(Always)
  • Vadim Seregin(Reporter)
  • yanye(Subscriber)