MUMBAI, India, May 30 -- Intellectual Property India has published a patent application (202527021659 A) filed by Beijing Xiaomi Mobile Software Co. Ltd., Beijing, on March 11, for 'method for encoding and decoding a 3d point cloud encoder decoder.'
Inventor(s) include Gao Shuo.
The application for the patent was published on May 30, under issue no. 22/2025.
According to the abstract released by the Intellectual Property India: "A method for encoding and decoding an encoder and decoder for a 3D point cloud into a bitstream a geometry of the point cloud being defined in an octree structure having a plurality of nodes having parent child relationships and representing a three dimensional location of an object the point cloud being located within a volumetric space of a three dimensional coordinate system recursively split into sub volumes and containing points of the point cloud wherein a volume is partitioned into a set of sub volumes each associated with a node of the octree based structure and wherein an occupancy information associated with each respective child sub volume indicates whether that respective child sub volume contains at least one of the points the method comprising: Obtaining nodes encompassing at least part of the point cloud at depth d in a lexicographic order along each of the axes X Y Z of the coordinate system; Entropy encoding or decoding the occupancy information of each node into a bitstream until depth k wherein k=d; Entropy encoding or decoding trisoup information of each leaf node at depth m into a bitstream wherein trisoup information includes information about presence and position of a vertex on edges of the volume associated with leaf nodes; Characterized in that the entropy encoding of occupancy information and the entropy encoding or decoding of trisoup information are based on the same order and the depth mk."
The patent application was internationally filed on Aug. 11, 2022, under International application No.PCT/CN2022/111929.
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