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US 2026/0017830 A1Published application
Three-dimensional data encoding method, three-dimensional data decoding method, three-dimensional data encoding device, and three-dimensional data decoding device
AssigneePanasonic Intellectual Property Corporation of America
InventorsTakahiro NISHI, Toshiyasu SUGIO, Noritaka IGUCHI
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Abstract
A three-dimensional data encoding method includes: encoding, for each of second units, information about positions of three-dimensional points included in a first unit, to generate encoded data items, the second units being smaller than the first unit that is an encoding unit; and outputting the encoded data items. Each of the encoded data items includes no individual additional information.
Claims3
A three-dimensional data decoding method comprising:
- obtaining a bitstream including encoded data items, the encoded data items having been generated by encoding, for each of second units, information about positions of three-dimensional points included in a first unit, each of the second units being smaller than the first unit;
- deriving common information from the bitstream;
- and
- decoding, by using the common information, the encoded data items to generate the information about the positions of the three-dimensional points included in the first unit, wherein
- in the decoding, a context is used for arithmetic decoding a first encoded data item included in the encoded data items,
- the common information is not provided to each of the encoded data items and the common information is commonly used between the encoded data items, and
- the common information indicates whether the context depends on another encoded data item included in the encoded data items.
4 more elements
A three-dimensional data decoding device comprising:
- a processor;
- and
- memory,
- wherein using the memory, the processor:
- obtains a bitstream including encoded data items, the encoded data items having been generated by encoding, for each of second units, information about positions of three-dimensional points included in a first unit, each of the second units being smaller than the first unit;
- derives common information from the bitstream;
- and
- decodes, by using the common information, the encoded data items to generate the information about the positions of the three-dimensional points included in the first unit, wherein
- in the decoding, a context is used for arithmetic decoding a first encoded data item included in the encoded data items,
- the common information is not provided to each of the encoded data items and the common information is commonly used between the encoded data items, and
- the common information indicates whether the context depends on another encoded data item included in the encoded data items.
8 more elements
A three-dimensional data encoding device comprising:
- a processor;
- and
- memory,
- wherein using the memory, the processor:
- encodes, for each of second units, information about positions of three-dimensional points included in a first unit, to generate encoded data items, the second units being smaller than the first unit;
- and
- outputs a bitstream including the encoded data items and common information, wherein
- in the encoding, a context is used for arithmetic encoding a first encoded data item included in the encoded data items,
- the common information is not provided to each of the encoded data items and the common information is commonly used between the encoded data items, and
- the common information indicates whether the context depends on another encoded data item included in the encoded data items.
7 more elements
Dependencies are inferred from the claim text.