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-12356007-B2
Application number	US-202318140983-A
Country	US
Kind code	B2
Filing date	Apr 28, 2023
Priority date	Jul 13, 2018
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

A three-dimensional data encoding method includes: generating a bitstream by encoding subspaces included in a current space in which three-dimensional points are included. The bitstream includes encoded data respectively corresponding to the subspaces. In the generating of the bitstream, a list of information about the subspaces is stored in first control information included in the bitstream. The subspaces are respectively associated with identifiers assigned to the subspaces, and the first control information is common to the encoded data. Each of the identifiers assigned to the subspaces respectively corresponding to the encoded data is stored in a header of a corresponding one of the encoded data.

First claim

What is claimed is:

1. A three-dimensional data encoding method, comprising:
generating first control information common to a plurality of subspaces;
encoding the plurality of subspaces included in a current space in which a plurality of three-dimensional points are included; and
generating a bitstream including the first control information and a plurality of encoded data respectively corresponding to the plurality of subspaces,
wherein the first control information includes information about the plurality of subspaces respectively associated with a plurality of identifiers,
each of headers of the plurality of encoded data includes information identifying a corresponding subspace, and
the headers are provided in the plurality of encoded data in one-to-one correspondence.

2. The three-dimensional data encoding method according to claim 1 ,
wherein the plurality of identifiers are included in the first control information.

3. The three-dimensional data encoding method according to claim 1 ,
wherein the first control information is disposed ahead of the plurality of encoded data in the bitstream.

4. The three-dimensional data encoding method according to claim 1 ,
wherein the first control information includes position information of each of the plurality of subspaces.

5. The three-dimensional data encoding method according to claim 1 ,
wherein the first control information includes size information of each of the plurality of subspaces.

6. A three-dimensional data decoding method, comprising:
obtaining, from a bitstream, first control information common to a plurality of subspaces; and
decoding, from the bitstream, at least one of a plurality of encoded data, the plurality of encoded data respectively corresponding to the plurality of subspaces included in a current space in which a plurality of three-dimensional points are included,
wherein the first control information includes information about the plurality of subspaces respectively associated with a plurality of identifiers,
each of headers of the plurality of encoded data includes information identifying a corresponding subspace, and
the headers are provided in the plurality of encoded data in one-to-one correspondence.

7. The three-dimensional data decoding method according to claim 6 ,
wherein the plurality of identifiers are included in the first control information.

8. The three-dimensional data decoding method according to claim 6 ,
wherein the first control information is disposed ahead of the plurality of encoded data in the bitstream.

9. The three-dimensional data decoding method according to claim 6 ,
wherein the first control information includes position information of each of the plurality of subspaces.

10. The three-dimensional data decoding method according to claim 6 ,
wherein the first control information includes size information of each of the plurality of subspaces.

11. A three-dimensional data encoder, comprising:
processor; and
memory,
wherein, using the memory, the processor:
generates first control information common to a plurality of subspaces;
encodes the plurality of subspaces included in a current space in which a plurality of three-dimensional points are included; and
generates a bitstream including the first control information and a plurality of encoded data respectively corresponding to the plurality of subspaces,
wherein the first control information includes information about the plurality of subspaces respectively associated with a plurality of identifiers,
each of headers of the plurality of encoded data includes information identifying a corresponding subspace, and
the headers are provided in the plurality of encoded data in one-to-one correspondence.

12. A three-dimensional data decoder, comprising:
processor; and
memory,
wherein, using the memory, the processor:
obtains, from a bitstream, first control information common to a plurality of subspaces; and
decodes, from the bitstream, at least one of a plurality of encoded data, the plurality of encoded data respectively corresponding to the plurality of subspaces included in a current space in which a plurality of three-dimensional points are included,
wherein the first control information includes information about the plurality of subspaces respectively associated with a plurality of identifiers,
each of headers of the plurality of encoded data includes information identifying a corresponding subspace, and
the headers are provided in the plurality of encoded data in one-to-one correspondence.

Assignees

• Panasonic Ip Corp America

Inventors

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

Classifications

• H04N19/70

  characterised by syntax aspects related to video coding, e.g. related to compression standards · CPC title

• G06T9/00

  Image coding (bandwidth or redundancy reduction for static pictures H04N1/41; coding or decoding of static colour picture signals H04N1/64; methods or arrangements for coding, decoding, compressing or decompressing digital video signals H04N19/00) · CPC title

• H04N19/176

  the region being a block, e.g. a macroblock · CPC title

• H04N19/184

  the unit being bits, e.g. of the compressed video stream · CPC title

• G06T9/001

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