Tiling for video based point cloud compression

A method for point cloud encoding, the method comprising:

• generating, for a three-dimensional (3D) point cloud, video frames and atlas frames that includes pixels representing information about the 3D point cloud, wherein atlas tiles represent partitions in the atlas frames and video tiles represent partitions in the video frames;
• setting a value for a syntax element according to relationships between sizes of the video tiles and sizes of the atlas tiles;
• encoding the video frames and the atlas frames to generate video sub-bitstreams and an atlas sub-bitstream, respectively;
• generating a bitstream based on the atlas sub-bitstream, the video sub-bitstreams, and the syntax element;
• and
• transmitting the bitstream.

A decoding device for point cloud decoding, the decoding device comprising:

• a communication interface configured to receive a bitstream.
• a processor operably coupled to the communication interface, the processor configured to:
• identify, from the bitstream, one or more video sub-bitstreams representing a three-dimensional (3D) point cloud, atlas sub-bitstream, and a syntax element with a value, wherein atlas tiles are included in the atlas sub-bitstream and video tiles are included in the video sub-bitstreams,
• identify from the value of the syntax element a relationships between sizes of the video tiles in the one or more video sub-bitstreams and sizes of the atlas tiles in the atlas sub-bitstream;
• decode a portion of the video sub-bitstreams and a portion of the atlas sub-bitstream, based on the video tiles and the atlas tiles, to generate a portion of video frames and a portion of atlas frames;
• and
• reconstruct a portion of the point cloud based on the portion of the video frames and the portion of the atlas frames.