Three-dimensional data encoding method, three-dimensional data decoding method, three-dimensional data encoding device, and three-dimensional data decoding device
US12177495B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2022 |
| Grant date | Dec 24, 2024 |
| Priority date | — |
| Expiry date | Jun 14, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/91
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A three-dimensional data encoding method includes: obtaining data units each including three-dimensional points; encoding the three-dimensional points included in each of the data units; and generating a bitstream including encoded data obtained by encoding the three-dimensional points. In the encoding: geometry information of three-dimensional points included in a data unit to be encoded is converted into occupancy maps using an N-ary tree; each of the occupancy maps is converted into an index using a table indicating a correspondence relation between occupancy maps and indexes, and the encoded data is generated by encoding the index; the table is updated according to the index resulting from the conversion, and is stored into the memory; and when it is determined that the table stored in the memory is not to be initialized, encoding of a next data unit is started using the table stored in the memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.