Opened 10 years ago Closed 9 years ago #75 closed defect (fixed)Semantics of max_vps_dec_pic_buffering_minus1
Description
max_vps_dec_pic_buffering_minus1[ i ][ k ][ j ] plus 1, when NecessaryLayerFlag[ i ][ k ] is equal to 1, specifies the maximum number of decoded pictures, of the k-th layer for the CVS in the i-th OLS, that need to be stored in the DPB when HighestTid is equal to j.
Semantics is ambiguous when saying "k-th layer for the CVS in the i-th OLS". It can be understood as a layer with index k in CVS in the i-th OLS, however it is a layer with index k, where the k is the index within layers included into i-th OLS.
Probably, "for the CVS" can be removed or moved after OLS. Change history (3)comment:1 Changed 10 years ago by DefaultCC Plugin
comment:2 Changed 9 years ago by jlchencomment:3 Changed 9 years ago by jlchen
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It’s true that the original text is a bit ambiguous. It’s much clearer if we change it as recommended.
max_vps_dec_pic_buffering_minus1[ i ][ k ][ j ] plus 1, when NecessaryLayerFlag[ i ][ k ] is equal to 1, specifies the maximum number of decoded pictures, of the k-th layer in the i-th OLS for the CVS, that need to be stored in the DPB when HighestTid is equal to j.
We did not have chance to incorporate before the finalization of SHVC specification. Let’s keep the ticket open and we can probably make the editorial change in a future version of HEVC specification.