US 12,262,055 B2
Point cloud data transmission device, point cloud data transmission method, point cloud data reception device, and point cloud data reception method
Hyejung Hur, Seoul (KR); and Sejin Oh, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 18/007,988
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Jun. 3, 2021, PCT No. PCT/KR2021/006914
§ 371(c)(1), (2) Date Dec. 2, 2022,
PCT Pub. No. WO2021/246796, PCT Pub. Date Dec. 9, 2021.
Claims priority of application No. 10-2020-0068366 (KR), filed on Jun. 5, 2020.
Prior Publication US 2023/0232042 A1, Jul. 20, 2023
Int. Cl. H04N 19/597 (2014.01); H04N 19/96 (2014.01)
CPC H04N 19/597 (2014.11) [H04N 19/96 (2014.11)] 8 Claims
OG exemplary drawing
 
1. A method of encoding point cloud data, the method comprising:
encoding geometry data of the point cloud data,
wherein the encoding of the geometry data including:
generating a predictive tree for the geometry data,
wherein a prediction list for the predictive tree is generated based on angular coordinates of the geometry data,
wherein the geometry data is predicted based on the prediction list that is updated based on a threshold for the geometry data;
sorting the geometry data and registering the geometry data in the prediction list;
searching for parent information related to current geometry data based on the prediction list;
generating a predicted value of the current geometry data based on at least one of parent information related to the current geometry data, parent information related to a parent of the current geometry data, or parent information related to a parent of the parent of the current geometry data according to the predictive tree;
encoding attribute data of the point cloud data; and
transmitting the point cloud data.