US 12,087,023 B2
Three-dimensional data encoding method, three-dimensional data decoding method, three-dimensional data encoding device, and three-dimensional data decoding device
Toshiyasu Sugio, Osaka (JP); Noritaka Iguchi, Osaka (JP); Pongsak Lasang, Singapore (SG); and Chung Dean Han, Johor Bahru (MY)
Assigned to PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA, Torrance, CA (US)
Filed by Panasonic Intellectual Property Corporation of America, Torrance, CA (US)
Filed on Oct. 7, 2021, as Appl. No. 17/496,230.
Application 17/496,230 is a continuation of application No. PCT/JP2020/016970, filed on Apr. 17, 2020.
Claims priority of provisional application 62/837,427, filed on Apr. 23, 2019.
Claims priority of provisional application 62/836,335, filed on Apr. 19, 2019.
Prior Publication US 2022/0028120 A1, Jan. 27, 2022
Int. Cl. G06T 9/00 (2006.01); G06F 5/01 (2006.01); H04N 19/597 (2014.01); H04N 19/63 (2014.01)
CPC G06T 9/001 (2013.01) [G06F 5/01 (2013.01); G06T 9/007 (2013.01); H04N 19/63 (2014.11); H04N 19/597 (2014.11)] 10 Claims
OG exemplary drawing
 
1. A three-dimensional data encoding method, comprising:
transforming pieces of attribute information of three-dimensional points included in point cloud data into coefficient values; and
encoding the coefficient values to generate a bitstream,
wherein in the transforming, a weighting calculation is performed hierarchically to generate the coefficient values, each of the coefficient values belonging to a corresponding one of layers, the weighting calculation separating each of the pieces of attribute information into a high-frequency component and a low-frequency component,
in the weighting calculation, the weighting calculation is performed using weights fixed or not fixed in the layers,
the bitstream includes first information indicating whether to fix the weights in the layers, and
in the weighting calculation, when the first information indicates that the weights are fixed in the layers, all weights used in the layers are fixed.