Three-dimensional data encoding method, three-dimensional data decoding method, three-dimensional data encoding device, and three-dimensional data decoding device

Patent metadata

Field	Value
Publication number	US-12200254-B2
Application number	US-202117333777-A
Country	US
Kind code	B2
Filing date	May 28, 2021
Priority date	Dec 6, 2018
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

A three-dimensional data encoding method includes: generating combined point cloud data by combining pieces of point cloud data; and generating a bitstream by encoding the combined point cloud data. The bitstream includes (i) first information indicating a maximum number of duplicated points that are included in each of the pieces of point cloud data and are three-dimensional points having same geometry information, and (ii) pieces of second information corresponding one-to-one with point indexes and each indicating which of the pieces of point cloud data three-dimensional points having a corresponding one of the point indexes belong to, the point indexes being indexes to which values a total number of which is equal to the maximum number are assigned, and being used for identifying duplicated points belonging to same point cloud data.

First claim

What is claimed is:

1. A method for storing three-dimensional data, the method comprising:
acquiring one or more units in which an encoded data generated by encoding three-dimensional data is stored; and
storing the one or more units into a file, wherein
the encoded data includes a frame that is point cloud frame data and includes a plurality of subframes each of which is sub point cloud frame data, and
the encoded data includes first metadata including time information for each of the plurality of subframes.

2. The method according to claim 1 , wherein
the encoded data includes common information for the plurality of subframes, and
the time information for each of the plurality of subframes is stored in the common information.

3. The method according to claim 1 , wherein
the encoded data includes a common parameter set for the plurality of subframes, and
the time information for each of the plurality of subframes is stored in the common parameter set.

4. The method according to claim 1 , wherein
the time information is a timestamp for each of the plurality of subframes.

5. The method according to claim 1 , wherein
the time information indicates a generation time, an encoding time, or a decoding time of the subframes.

6. The method according to claim 1 , wherein
the encoded data includes second metadata including sensor information for acquiring the data of the plurality of subframes.

7. The method according to claim 1 , wherein
the file is in conformity with ISO Based Media File Format (ISOBMFF).

8. A device for storing three-dimensional data, the device comprising:
a processor; and
memory,
wherein, using the memory, the processor:
acquires one or more units in which an encoded data generated by encoding three-dimensional data is stored; and
stores the one or more units into a file, wherein

the encoded data includes a frame that is point cloud frame data and includes a plurality of subframes each of which is sub point cloud frame data, and
the encoded data includes first metadata including time information for each of the plurality of subframes.

Assignees

• Panasonic Ip Corp America

Inventors

• Sugio Toshiyasu
• Iguchi Noritaka
• Han Chung Dean
• Wang Chi
• Lasang Pongsak

Classifications

• G06V20/64

  Three-dimensional [3D] objects · CPC title

• G06F18/251

  of input or preprocessed data · CPC title

• G06T9/40

  Tree coding, e.g. quadtree, octree · CPC title

• G06T9/001

  Model-based coding, e.g. wire frame · CPC title

• G06V2201/12

  Acquisition of 3D measurements of objects · CPC title