3D DATA CODING METHOD, 3D DATA DECODING METHOD, 3D DATA CODING DEVICE AND 3D DATA DECODING DEVICE Russian patent published in 2023 - IPC G06T9/00 H04N19/597 

FIELD: 3D data coding method; 3D data decoding method; 3D data coding device; 3D data decoding device.

SUBSTANCE: 3D data encoding method includes: calculating difference values each of which is a difference between (i) a corresponding one of the 3D point attribute information pieces included in the point cloud data and (ii) a predicted value corresponding to the proper attribute information; generating a second code sequence including first information and second information, the first information indicating the total number of zero difference values consecutive in the first code sequence in which the difference values are located, the second information indicating the value of a non-zero difference value included in the difference values, and zero difference values are included in the difference values and have a value of 0; and generating a bit stream including the second code sequence.

EFFECT: increasing the coding efficiency.

16 cl, 113 dwg