Three-dimensional data encoding method, three-dimensional data decoding method, three-dimensional data encoding device, and three-dimensional data decoding device
View Patent ↗A three-dimensional data encoding method includes: classifying three-dimensional points included in point cloud data into layers, based on geometry information of the three-dimensional points; generating first information indicating whether to permit referring to, for a current three-dimensional point included in the three-dimensional points, attribute information of another three-dimensional point belonging to a same layer as the current three-dimensional point; and encoding attribute information of the current three-dimensional point to generate a bitstream, by or without referring to the attribute information of the other three-dimensional point according to the first information. The bitstream includes the first information.
1. A three-dimensional data encoding method, comprising:
classifying three-dimensional points included in point cloud data into layers, based on geometry information of the three-dimensional points;
generating first information indicating whether to permit referring to, for a current three-dimensional point included in the three-dimensional points, attribute information of another three-dimensional point belonging to a same layer as the current three-dimensional point; and
encoding attribute information of the current three-dimensional point to generate a bitstream, by or without referring to the attribute information of the other three-dimensional point according to the first information,
wherein the bitstream includes the first information.
2. The three-dimensional data encoding method according to claim 1 ,
wherein when the first information indicates to permit referring to the attribute information of the other three-dimensional point, the attribute information of the current three-dimensional point is encoded by referring to attribute information of an encoded three-dimensional point included in three-dimensional points belonging to the same layer as the current three-dimensional point.
3. The three-dimensional data encoding method according to claim 1 ,
wherein in the encoding, the attribute information of the current three-dimensional point is encoded by referring to attribute information of a three-dimensional point belonging to a layer higher than a layer to which the current three-dimensional point belongs, regardless of the first information.
4. A three-dimensional data decoding method, comprising:
classifying three-dimensional points included in point cloud data into layers, based on geometry information of the three-dimensional points;
obtaining first information from a bitstream, the first information indicating whether to permit referring to, for a current three-dimensional point included in the three-dimensional points, attribute information of another three-dimensional point belonging to a same layer as the current three-dimensional point; and
decoding attribute information of the current three-dimensional point from the bitstream, by or without referring to the attribute information of the other three-dimensional point according to the first information.
5. The three-dimensional data decoding method according to claim 4 ,
wherein when the first information indicates to permit referring to the attribute information of the other three-dimensional point, the attribute information of the current three-dimensional point is decoded by referring to attribute information of a decoded three-dimensional point included in three-dimensional points belonging to the same layer as the current three-dimensional point.
6. The three-dimensional data decoding method according to claim 4 ,
wherein in the decoding, the attribute information of the current three-dimensional point is decoded by referring to attribute information of a three-dimensional point belonging to a layer higher than a layer to which the current three-dimensional point belongs, regardless of the first information.
7. A three-dimensional data encoding device, comprising:
a processor; and
memory,
wherein using the memory, the processor:
classifies three-dimensional points included in point cloud data into layers, based on geometry information of the three-dimensional points;
generates first information indicating whether to permit referring to, for a current three-dimensional point included in the three-dimensional points, attribute information of another three-dimensional point belonging to a same layer as the current three-dimensional point; and
encodes attribute information of the current three-dimensional point to generate a bitstream, by or without referring to the attribute information of the other three-dimensional point according to the first information,
wherein the bitstream includes the first information.
8. A three-dimensional data decoding device, comprising:
a processor; and
memory,
wherein using the memory, the processor:
classifies three-dimensional points included in point cloud data into layers, based on geometry information of the three-dimensional points;
obtains first information from a bitstream, the first information indicating whether to permit referring to, for a current three-dimensional point included in the three-dimensional points, attribute information of another three-dimensional point belonging to a same layer as the current three-dimensional point; and
decodes attribute information of the current three-dimensional point from the bitstream, by or without referring to the attribute information of the other three-dimensional point according to the first information.