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US 12,010,350 B2Granted
Point cloud data transmission device, point cloud data transmission method, point cloud data reception device, and point cloud data reception method
AssigneeLG Electronics Inc.
InventorsHyunmook Oh, Sejin Oh
Life of this patent
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Abstract
A point cloud data transmission method according to embodiments comprises the steps of: acquiring point cloud data; encoding geometry information included in the point cloud data; encoding attribute information included in the point cloud data; and transmitting the encoded geometry information and the encoded attribute information.
Claims15
A method of transmitting point cloud data, the method comprising:
- acquiring point cloud data that comprises points;
- encoding geometry information included in the point cloud data;
- encoding attribute information included in the point cloud data;
- and
- transmitting the encoded geometry information and the encoded attribute information,
- wherein the encoding of the geometry information comprises:
- generating an octree structure by recursively subdividing a bounding box for the point cloud data, wherein the octree structure is formed of levels, wherein each of the levels except a leaf node level includes a plurality of nodes and wherein each of the plurality of nodes is an occupied node that includes one or more points or a unoccupied node that does not include any point, and
- entropy encoding the geometry information based on the octree structure, wherein the encoding of the attribute information comprises:
- selecting predicted attribute information of a node to be attribute-encoded based on the octree structure, wherein attribute information of at least one of nodes in the octree structure is used for the predicted attribute information, and wherein, based on a parent node of the node to be attribute-encoded including two or more occupied child nodes that include the node, one of the two or more occupied child nodes is selected for the predicted attribute information, and
- acquiring residual attribute information based on the attribute information of the node to be attribute-encoded and the predicted attribute information.
7 more elements
An apparatus configured to transmit point cloud data, the apparatus comprising:
- an acquirer configured to acquire point cloud data that comprises points;
- a geometry encoder configured to encode geometry information included in the point cloud data;
- an attribute encoder configured to encode attribute information included in the point cloud data;
- and
- a transmitter configured to transmit the encoded geometry information and the encoded attribute information,
- wherein the geometry encoder is configured to generate an octree structure by recursively subdividing a bounding box for the point cloud data and entropy-encode the geometry information based on the octree structure, wherein the octree structure is formed of levels, wherein each of the levels except a leaf node level includes a plurality of nodes, and wherein each of the plurality of nodes is an occupied node that includes one or more points or a unoccupied node that does not include any point, and
- wherein the attribute encoder is configured to:
- select predicted attribute information of a node to be attribute-encoded based on the octree structure, wherein attribute information of at least one of nodes in the octree structure is used for the predicted attribute information, and wherein, based on a parent node of the node to be attribute-encoded including two or more occupied child nodes that include the node, one of the two or more occupied child nodes is selected for the predicted attribute information, and
- acquire residual attribute information based on the attribute information of the node to be attribute-encoded and the predicted attribute information.
6 more elements
A method of receiving point cloud data, the method comprising:
- receiving point cloud data and signaling information;
- decoding geometry information included in the point cloud data;
- decoding attribute information included in the point cloud data;
- and
- processing and rendering the decoded geometry information and the decoded attribute information,
- wherein decoding the geometry information comprises:
- entropy decoding occupancy codes in the geometry information,
- generating an octree structure based on the occupancy codes, wherein the octree structure is formed of levels, wherein each of the levels except a leaf node level includes a plurality of nodes, and wherein each of the plurality of nodes is an occupied node that includes one or more points or an unoccupied node that does not include any point, and
- wherein decoding the attribute information comprises:
- selecting predicted attribute information of a node to be attribute-decoded based on the octree structure, wherein attribute information of at least one of nodes in the octree structure is used for the predicted attribute information, and wherein, based on a parent node of the node to be attribute-encoded including two or more occupied child nodes that include the node, one of the two or more occupied child nodes is selected for the predicted attribute information, and
- restoring the attribute information of the node to be attribute-decoded based on the predicted attribute information and residual attribute information in the received attribute information.
8 more elements
An apparatus configured to receive point cloud data, the apparatus comprising:
- a receiver configured to receive point cloud data and signaling information;
- a geometry decoder configured to decode geometry information included in the point cloud data;
- an attribute decoder configured to decode attribute information included in the point cloud data;
- and
- a renderer configured to process and render the decoded geometry information and the decoded attribute information,
- wherein the geometry information decoder is configured to entropy decode occupancy codes in the geometry information and generate an octree structure based on the occupancy codes, wherein the octree structure is formed of levels, wherein each of the levels except a leaf node level includes a plurality of nodes, and wherein each of the plurality of nodes is an occupied node that includes one or more points or a unoccupied node that does not include any point, and
- wherein the attribute information decoder is configured to:
- select predicted attribute information of a node to be attribute-decoded based on the octree structure, wherein attribute information of at least one of nodes in the octree structure is used for the predicted attribute information, and wherein, based on a parent node of the node to be attribute-encoded including two or more occupied child nodes that include the node, one of the two or more occupied child nodes is selected for the predicted attribute information, and
- restore the attribute information of the node to be attribute-decoded based on the predicted attribute information and residual attribute information in the received attribute information.
6 more elements
Dependencies are inferred from the claim text.