Parameterized arithmetic coding for point cloud attribute compression

A method of encoding point cloud data, comprising:

• obtaining a feature map representing attributes of voxels in an octree structure;
• determining one or more probability distribution parameters for a probability density function associated with an attribute of a current voxel, based on the feature map;
• determining a probability mass function of the attribute of the current voxel based on the one or more probability distribution parameters for the probability density function for the current voxel;
• and
• encoding attribute information of the current voxel in the octree structure, based on the probability mass function of the attribute for the current voxel.

An apparatus for decoding point cloud data, comprising one or more processors and at least one memory coupled to the one or more processors, wherein the one or more processors are configured to:

• obtain a feature map representing attributes of voxels in an octree structure;
• determine one or more probability distribution parameters for a probability density function associated with an attribute of a current voxel, based on the feature map;
• determine a probability mass function of the attribute of the current voxel based on the one or more probability distribution parameters for the probability density function for the current voxel;
• and
• decode attribute information of the current voxel in the octree structure, based on the probability mass function of the attribute for the current voxel.

An apparatus for encoding point cloud data, comprising one or more processors and at least one memory coupled to the one or more processors, wherein the one or more processors are configured to:

• obtain a feature map representing attributes of voxels in an octree structure;
• determine one or more probability distribution parameters for a probability density function associated with an attribute of a current voxel, based on the feature map;
• determine a probability mass function of the attribute of the current voxel based on the one or more probability distribution parameters for the probability density function for the current voxel;
• and
• encode attribute information of the current voxel in the octree structure, based on the probability mass function of the attribute for the current voxel.