| CPC G06T 9/001 (2013.01) [G06T 9/40 (2013.01)] | 10 Claims |
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1. A three-dimensional data encoding method comprising:
encoding information of a target node included in an N-ary tree structure of three-dimensional points included in three-dimensional data, N being an integer greater than or equal to 2; and
generating a bitstream including the information of the target node encoded,
wherein in the encoding, the target node is encoded based on reference limitation information indicating a referable neighbor node among neighbor nodes spatially neighboring the target node,
in the generating:
the bitstream further including the reference limitation information is generated;
when the target node is encoded by reference to information of a first neighbor node, the bitstream further including encoding processing information is generated, the encoding processing information indicating a processing method in the encoding; and
when the target node is encoded without reference to the information of the first neighbor node, the bitstream is generated without including the encoding processing information in the bitstream,
the first neighbor node is one of the neighbor nodes, and
a parent node of the first neighbor node is different from a parent node of the target node.
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