CPC H04N 19/119 (2014.11) [H04N 19/105 (2014.11); H04N 19/174 (2014.11); H04N 19/176 (2014.11)] | 18 Claims |
1. A method performed by at least one processor, the method comprising:
receiving a coded video stream including a picture partitioned into first sub-picture units, the first sub-picture units including:
one first sub-picture unit, and
an additional first sub-picture unit including a first ordered second sub-picture unit, from among second sub-picture units of the additional first sub-picture unit, and a last ordered second sub-picture unit, from among the second sub-picture units of the additional first sub-picture unit; and
decoding the picture, the decoding comprising:
obtaining an index value of a first ordered second sub-picture unit of the one first sub-picture unit and an index value of a last ordered second sub-picture unit of the one first sub-picture unit, wherein the index value of the first ordered second sub-picture unit of the one first sub-picture unit and the index value of the last ordered second sub-picture unit of the one first sub-picture unit are obtained by explicitly signaling the index value of the first ordered second sub-picture unit of the one first sub-picture unit; and
obtaining index values of the first ordered second sub-picture unit and the last ordered second sub-picture unit of the additional first sub-picture unit, without the coded video stream explicitly signaling any of the index values, of the first ordered second sub-picture unit and the last ordered second sub-picture unit of the additional first sub-picture unit, and a difference value between the index values of the first ordered second sub-picture unit and the last ordered second sub-picture unit of the additional first sub-picture unit to the at least one processor,
wherein the additional first sub-picture unit has an order value that is subsequent to an order value of the one first sub-picture unit, and
wherein the obtaining the index value of the last ordered second sub-picture unit of the additional first sub-picture unit comprises obtaining the index value of the last ordered second sub-picture unit of the additional first sub-picture unit based on a value of a syntax element indicating a total number of second sub-picture units within all of the first sub-picture units within the picture.
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