Point cloud encoding and decoding method, encoder, and decoder

A point cloud decoding method, implemented in a decoder and comprising:

• decoding a bitstream to obtain a coordinate-axis-order index;
• determining a processing order of point cloud data during point cloud decoding according to the coordinate-axis-order index, the processing order indicating a coordinate axis processing order of three-dimensional coordinates of the point cloud data and the point cloud data being all or part of data in point cloud;
• decoding the bitstream to obtain recovered data of the point cloud data;
• and
• determining a position of coordinate data of the point cloud data in a storage unit of the recovered data according to the processing order, wherein a correspondence table between preset indexes and processing orders comprises:
• coordinate-axis-order index
• processing order
• 0
• Z-Y-X order
• 1
• X-Y-Z order
• 2
• X-Z-Y order
• 3
• Y-Z-X order
• 4
• Z-Y-X order
• 5
• Z-X-Y order
• 6
• Y-X-Z order
• 7
• X-Y-Z order.

An encoder, comprising:

• at least one processor;
• and
• a memory coupled to the at least one processor and storing at least one computer executable instruction thereon which, when executed by the at least one processor, causes the at least one processor to:
• determine a processing order of point cloud data during point cloud encoding, the processing order indicating a coordinate axis processing order of three-dimensional coordinates of the point cloud data and the point cloud data being all or part of data in point cloud;
• determine a coordinate-axis-order index corresponding to the processing order;
• encode the coordinate-axis-order index and signal encoded bits into a bitstream;
• process the point cloud data according to the processing order, to obtain point cloud data to-be-encoded;
• and
• encode the point cloud data to-be-encoded and signal encoded bits into the bitstream, wherein a correspondence table between preset indexes and processing orders comprises:
• coordinate-axis-order index
• processing order
• 0
• Z-Y-X order
• 1
• X-Y-Z order
• 2
• X-Z-Y order
• 3
• Y-Z-X order
• 4
• Z-Y-X order
• 5
• Z-X-Y order
• 6
• Y-X-Z order
• 7
• X-Y-Z order.

A decoder, comprising:

• at least one processor;
• and
• a memory coupled to the at least one processor and storing at least one computer executable instruction thereon which, when executed by the at least one processor, causes the at least one processor to:
• decode a bitstream to obtain a coordinate-axis-order index;
• determine a processing order of point cloud data during point cloud decoding according to the coordinate-axis-order index, the processing order indicating a coordinate axis processing order of three-dimensional coordinates of the point cloud data and the point cloud data being all or part of data in point cloud;
• decode the bitstream to obtain recovered data of the point cloud data;
• and
• determine a position of coordinate data of the point cloud data in a storage unit of the recovered data according to the processing order, wherein a correspondence table between preset indexes and processing orders comprises:
• coordinate-axis-order index
• processing order
• 0
• Z-Y-X order
• 1
• X-Y-Z order
• 2
• X-Z-Y order
• 3
• Y-Z-X order
• 4
• Z-Y-X order
• 5
• Z-X-Y order
• 6
• Y-X-Z order
• 7
• X-Y-Z order.