CPC H04N 19/105 (2014.11) [H04N 19/172 (2014.11); H04N 19/174 (2014.11); H04N 19/70 (2014.11)] | 20 Claims |
1. A method for processing video data, comprising:
performing a conversion between a video comprising one or more pictures and a bitstream of the video according to a format rule,
wherein the format rule specifies that a first picture referred to by each inter-layer reference picture entry in a reference picture list of a slice of a current picture of a current layer satisfies a constraint,
wherein a first syntax element is included in the bitstream,
wherein the first syntax element is a two dimensional syntax element, and the first syntax element corresponding to an index of the current layer and an index of a reference layer is one of multiple first syntax elements included in the bitstream corresponding to indices of different current layers and indices of different reference layers, respectively, and
wherein the constraint comprises at least one of: (a) the first picture is an intra random access (IRAP) picture or (b) the first picture has a temporal identifier that is less than a value of the first syntax element corresponding to the index of the current layer and the index of a reference layer.
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