# US 11,909,952 B2 · Three-dimensional data encoding method, three-dimensional data decoding method, three-dimensional data encoding device, and three-dimensional data decoding device

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- Number: US 11,909,952 B2
- Document ID: US11909952B2
- Status: Granted
- Kind: B2
- Application number: 17/471,554
- Filed: 2021-09-10
- Published: 2021-12-30
- Granted: 2024-02-20
- Earliest claimed: 2018-06-13
- Assignees: Panasonic Intellectual Property Corporation of America
- Applicants: Panasonic Intellectual Property Corporation of America
- Inventors: Toshiyasu Sugio
- Web page: https://patentgrep.com/patent/US11909952B2

## CPC

- G06T 9/004: {Predictors, e.g. intraframe, interframe coding}
- H04N 19/103: Selection of coding mode or of prediction mode
- G06T 9/40: Tree coding, e.g. quadtree, octree
- H04N 19/136: Incoming video signal characteristics or properties
- H04N 19/184: the unit being bits, e.g. of the compressed video stream
- H04N 19/186: the unit being a colour or a chrominance component
- H04N 19/597: specially adapted for multi-view video sequence encoding
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

A three-dimensional data encoding method encodes a plurality of three-dimensional points, and includes: selecting one of two or more prediction modes for calculating a predicted value of an attribute information item of the first three-dimensional point, in accordance with attribute information items of one or more second three-dimensional points in the vicinity of a first three-dimensional point; calculating the predicted value by the selected prediction mode; calculating, as a prediction residual, a difference between a value of the attribute information item of the first three-dimensional point and the calculated predicted value; and generating a bit stream that includes the one prediction mode and the prediction residual.

## Claims

### Claim 1

A three-dimensional data encoding method of encoding a plurality of three-dimensional points, the method comprising:
selecting one prediction mode from among two or more prediction modes, the two or more prediction modes each being used to calculate a predicted value of an attribute information of a three-dimensional point;
calculating, based on the one prediction mode selected, a predicted value of attribute information of a first three-dimensional point in accordance with attribute information of one or more second three-dimensional points; and
generating a bitstream including an index to indicate the one prediction mode selected.

### Claim 2

A three-dimensional data decoding method of decoding a plurality of three-dimensional points, the method comprising:
obtaining a bitstream including a prediction residual and an index to indicate one prediction mode selected from among two or prediction modes each of which is used to calculate a predicted value of an attribute information of a three-dimensional point;
calculating, based on the one prediction mode obtained, a predicted value of attribute information of a first three-dimensional point in accordance with attribute information of one or more second three-dimensional points; and
adding the predicted value to the prediction residual to calculate an attribute information item of the first three-dimensional point.