Attribute coding for point cloud compression

A method of decoding point cloud data, the method comprising:

• receiving a geometry bitstream including encoded geometry data of the point cloud data that is encoded in accordance with a first encoding process;
• decoding, with a first decoding process that is reciprocal of the first encoding process, the encoded geometry data to generate first reconstructed geometry data;
• receiving an attribute bitstream including encoded attribute data of the point cloud data that is encoded in accordance with a second encoding process;
• and
• decoding, with a second decoding process that is reciprocal of the second encoding process and with the first reconstructed geometry data as input, the encoded attribute data to generate decoded attribute data of the point cloud data and second reconstructed geometry data, the second reconstructed geometry data being reconstructed geometry data of the point cloud data.

A system for encoding point cloud data, the system comprising:

• one or more memories configured to store point cloud data;
• and
• processing circuitry coupled to the one or more memories and configured to:
• receive, for a first encoding process, geometry data of the point cloud data of a source point cloud;
• encode, in accordance with the first encoding process, the geometry data to generate encoded geometry data and a geometry bitstream;
• decode the encoded geometry data to generate reconstructed geometry data for a target point cloud;
• perform an attribute recomputing process on attribute data of the point cloud data of the source point cloud based on the reconstructed geometry data to generate recomputed, reconstructed point cloud data of the target point cloud;
• and
• encode, in accordance with a second encoding process, the recomputed, reconstructed point cloud data to generate an attribute bitstream.

A system for decoding point cloud data, the system comprising:

• one or more memories configured to store point cloud data;
• and
• processing circuitry coupled to the one or more memories and configured to:
• receive a geometry bitstream including encoded geometry data of the point cloud data that is encoded in accordance with a first encoding process;
• decode, with a first decoding process that is reciprocal of the first encoding process, the encoded geometry data to generate first reconstructed geometry data;
• receive an attribute bitstream including encoded attribute data of the point cloud data that is encoded in accordance with a second encoding process;
• and
• decode, with a second decoding process that is reciprocal of the second encoding process and with the reconstructed geometry data as input, the encoded attribute data to generate decoded attribute data of the point cloud data and second reconstructed geometry data, the second reconstructed geometry data being reconstructed geometry data of the point cloud data.

A non-transitory computer-readable storage medium storing instructions thereon that when executed cause one or more processors to:

• receive, for a first encoding process, geometry data of the point cloud data of a source point cloud;
• encode, in accordance with the first encoding process, the geometry data to generate encoded geometry data of a target point cloud and a geometry bitstream;
• decode the encoded geometry data to generate reconstructed geometry data;
• perform an attribute recomputing process on attribute data of the point cloud data of the source point cloud based on the reconstructed geometry data to generate recomputed, reconstructed point cloud data of the target point cloud;
• and
• encode, in accordance with a second encoding process, the recomputed, reconstructed point cloud data to generate an attribute bitstream.

A non-transitory computer-readable storage medium storing instructions thereon that when executed cause one or more processors to:

• receive a geometry bitstream including encoded geometry data of the point cloud data that is encoded in accordance with a first encoding process;
• decode, with a first decoding process that is reciprocal of the first encoding process, the encoded geometry data to generate first reconstructed geometry data;
• receive an attribute bitstream including encoded attribute data of the point cloud data that is encoded in accordance with a second encoding process;
• and
• decode, with a second decoding process that is reciprocal of the second encoding process and with the first reconstructed geometry data as input, the encoded attribute data to generate decoded attribute data of the point cloud data and second reconstructed geometry data of the point cloud data, the second reconstructed geometry data being reconstructed geometry data.