Techniques and apparatus for automatic roi chunking for content-aware point cloud compression using hevc tiles

An apparatus for point cloud decoding, the apparatus comprising:

• at least one memory configured to store computer program code;
• and
• at least one processor configured to access the at least one memory and operate according to the computer program code, the computer program code comprising:
• receiving code configured to cause the at least one hardware processor to receive, from a bitstream, multiple partitions of a point cloud, the multiple partitions comprising a first partition and a second partition;
• determining code configured to cause the at least one processor to determine, for each of the multiple partitions into which the point cloud is partitioned, a maximum number of tiles in a frame used to pack a respective one of the multiple partitions, among a group of frames, the maximum number of tiles for the first partition being different than the maximum number of tiles for the second partition;
• and
• decoding code configured to cause the at least one processor to decode the point cloud based on a packing of each of the multiple partitions into the maximum number of tiles obtained for a respective one of the multiple partitions, in each of the group of frames, wherein the packing is based on each of the maximum number of tiles for the first partition and the maximum number of tiles for the second partition not being shared by any of the multiple partitions and remaining the same for all frames in the group of frames.

A non-transitory computer-readable storage medium storing instructions that cause at least one processor to:

• receive, from a bitstream, multiple partitions of a point cloud, the multiple partitions comprising a first partition and a second partition;
• determining, for each of the multiple partitions into which the point cloud is partitioned, a maximum number of tiles in a frame used to pack a respective one of the multiple partitions, among a group of frames, the maximum number of tiles for the first partition being different than the maximum number of tiles for the second partition;
• and
• decoding the point cloud based on a packing of each of the multiple partitions into the maximum number of tiles obtained for a respective one of the multiple partitions, in each of the group of frames, wherein the packing is based on each of the maximum number of tiles for the first partition and the maximum number of tiles for the second partition not being shared by any of the multiple partitions and remaining the same for all frames in the group of frames.