US 12,283,076 B2
Decoding method, decoding apparatus and program for decoding part of an entire point cloud in a three-dimensional space
Shiori Sugimoto, Musashino (JP); Mayuko Watanabe, Musashino (JP); Ryuichi Tanida, Musashino (JP); and Hideaki Kimata, Musashino (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 18/039,407
Filed by NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
PCT Filed Dec. 25, 2020, PCT No. PCT/JP2020/048833
§ 371(c)(1), (2) Date May 30, 2023,
PCT Pub. No. WO2022/137537, PCT Pub. Date Jun. 30, 2022.
Prior Publication US 2023/0419558 A1, Dec. 28, 2023
Int. Cl. H04N 19/96 (2014.01); G06T 9/40 (2006.01)
CPC G06T 9/40 (2013.01) [H04N 19/96 (2014.11)] 7 Claims
OG exemplary drawing
 
1. A decoding method performed by a decoding device, the decoding method comprising:
acquiring, from among a plurality of slice numbers indicating a plurality of slices associated with encoded data of the entire point cloud distributed in a three-dimensional space, a first slice number indicating a first slice associated with encoded data of a point cloud of a first space that is a portion of the three-dimensional space, based on a pointer indicating the first slice; and
acquiring the encoded data of the point cloud of the first space based on the first slice number, and decoding point cloud data of the first space from the encoded data of the point cloud of the first space;
wherein the point cloud is expressed by an octree structure,
the first space has a predetermined positional relationship to a second space,
the second space is a portion of the three-dimensional space,
the encoded data of the first slice and the encoded data of a second slice corresponding to the encoded data of the point cloud in the second space belong to a plurality of hierarchies defined for the encoded data of the entire point cloud,
the predetermined positional relationship is a relationship of being spatially adjacent to each other or a relationship of a parent space and a child space, and
a data table or tree indicating the relationship of the parent space and the child space is added to a slice header or a independent syntax table of the first slice.