Patent ID: 11943457
Assignee: SONY GROUP CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC H

Claim 0:
1. An information processing apparatus comprising
a hierarchization unit configured to perform hierarchization of attribute information about a point cloud representing a three-dimensional object by recursively repeating, on a reference point, a process of classifying points of the point cloud into a prediction point that is a point at which a difference value between the attribute information and a predicted value is left, and the reference point that is a point at which the attribute information is referred to during derivation of the predicted value,
wherein, during the hierarchization, the hierarchization unit is further configured to select the prediction point in such a manner that a point also exists in a voxel of a hierarchical level one level higher than a hierarchical level to which voxels containing points of a current hierarchical level belong; and
a quantization unit configured to quantize the difference value of each point of each hierarchical level, using a quantization weight for each hierarchical level of a plurality of hierarchical levels, the difference value having been generated by the hierarchization unit,
wherein the quantization unit is further configured to quantize the difference value, using the quantization weight for each hierarchical level, the quantization weight for a respective hierarchical level of the plurality of hierarchical levels being set to a value greater than the quantization weight for hierarchical levels of the plurality of hierarchical levels lower than the respective hierarchical level, and
wherein the hierarchization unit and the quantization unit are each implemented via at least one processor.