Method, apparatus, and medium for point cloud coding

An apparatus for processing point cloud data comprising a processor and a non-transitory memory with instructions thereon, wherein the instructions upon execution by the processor, cause the processor to:

• determine, for a conversion between a current frame of a point cloud sequence and a bitstream of the point cloud sequence, at least one neighbour sub-node of a current node of the current frame, a node representing a spatial partition of the current frame, a sub-node being a portion of a node;
• determine first attribute information of a sub-node of the current node based on at least one second attribute information of the at least one neighbour sub-node;
• and
• perform the conversion based on the first attribute information.

A non-transitory computer-readable storage medium storing instructions that cause a processor to:

• determine, for a conversion between a current frame of a point cloud sequence and a bitstream of the point cloud sequence, at least one neighbour sub-node of a current node of the current frame, a node representing a spatial partition of the current frame, a sub-node being a portion of a node;
• determine first attribute information of a sub-node of the current node based on at least one second attribute information of the at least one neighbour sub-node;
• and
• perform the conversion based on the first attribute information.

A non-transitory computer-readable recording medium storing a bitstream of a point cloud sequence which is generated by a method performed by a point cloud processing apparatus, wherein the method comprises:

• determining at least one neighbour sub-node of a current node of a current frame of the point cloud sequence, a node representing a spatial partition of the current frame, a sub-node being a portion of a node;
• determining first attribute information of a sub-node of the current node based on at least one second attribute information of the at least one neighbour sub-node;
• and
• generating the bitstream based on the first attribute information.