Point cloud encoding and decoding method and apparatus

A point cloud decoding apparatus comprising:

• a memory configured to store instructions;
• and
• a processor coupled to the memory and configured to execute the instructions, that cause the apparatus to be configured to:
• receive a bitstream;
• parse the bitstream to obtain subgroup information, wherein the subgroup information comprises a quantity M of subgroups into which N frames of point clouds are divided or a quantity of frames of point clouds comprised in each of one or more subgroups among the M subgroups;
• and
• decode the N frames of point clouds based on the subgroup information.

A point cloud decoding apparatus comprising:

• a memory configured to store instructions;
• and
• a processor coupled to the memory and configured to execute the instructions, that when executed by the processor cause the point cloud decoding apparatus to be configured to:
• receive a bitstream;
• parse the bitstream to obtain first rotation angle information of one or more first matched patches in a first patch set of a first frame of a point cloud in a current subgroup;
• and
• determine second rotation angle information of a second matched patch in a second patch set of a non-first frame of the point cloud based on the first rotation angle information,
• wherein the second rotation angle information is for decoding the point cloud.