System and method for geometry point cloud coding

A method for decoding a mesh, the mesh being represented in a one-dimension (1D) array comprising a set of points, the method comprising:

• decoding, by a at least one processor, a base mesh from a bitstream;
• performing, by the at least one processor, mesh segmentation on the base mesh to generate a subdivided mesh indicated by the bitstream;
• decoding, by the at least one processor, a first syntax element that indicates a first level-of-detail (LoD) associated with a sequence of frames;
• decoding, by the at least one processor, a second syntax element that indicates a first coding mode associated with the sequence of frames at the first LoD;
• decoding, by the at least one processor, a first zero-run length code to generate a first plurality of wavelet-transform coefficients based on the first LoD and the first coding mode associated with the sequence of frames;
• generating, by the at least one processor, a first set of mesh displacements for the sequence of frames based on the first plurality of wavelet-transform coefficients;
• and
• generating, by the at least one processor, a first reconstructed mesh based on the subdivided mesh and the first set of mesh displacements.

A system for decoding a mesh, the mesh being represented in a one-dimension (1D) array comprising a set of points, the system comprising:

• at least one processor;
• and
• memory storing instructions, which when executed by the at least one processor, cause the at least one processor to:
• decode a base mesh from a bitstream;
• perform mesh segmentation on the base mesh to generate a subdivided mesh indicated by the bitstream;
• decode a first syntax element that indicates a first level-of-detail (LoD) associated with a sequence of frames;
• decode a second syntax element that indicates a coding mode associated with the sequence of frames at the first LoD;
• decode a first zero-run length code to generate a first plurality of wavelet-transform coefficients based on the first LoD and the first coding mode associated with the sequence of frames;
• generate a first set of mesh displacements for the sequence of frames based on the first plurality of wavelet-transform coefficients;
• and
• generate a first reconstructed mesh based on the subdivided mesh and the first set of mesh displacements.