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

A technology of three-dimensional data and decoding method, which is applied in image data processing, image coding, digital video signal modification, etc., and can solve problems such as large amount of point group data

Pending Publication Date: 2022-06-03
PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it is expected that point cloud will become the mainstream as a representation method of 3D data, the data volume of point group is very large

Method used

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  • Three-dimensional data decoding method and three-dimensional data decoding device
  • Three-dimensional data decoding method and three-dimensional data decoding device
  • Three-dimensional data decoding method and three-dimensional data decoding device

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Embodiment approach 1

[0214] When the encoded data of the point cloud is used in an actual device or service, it is desirable to transmit and receive necessary information according to the application in order to suppress the network bandwidth. However, such a function does not exist in the conventional encoding structure of three-dimensional data, and thus there is no encoding method corresponding to this.

[0215] In the present embodiment, a three-dimensional data encoding method and a three-dimensional data encoding device for providing a function of transmitting and receiving required information according to the application in encoded data of a three-dimensional point cloud, and the A three-dimensional data decoding method and a three-dimensional data decoding apparatus for decoding encoded data, a three-dimensional data multiplexing method for multiplexing the encoded data, and a three-dimensional data transmission method for transmitting the encoded data will be described.

[0216] In parti...

Embodiment approach 2

[0345] In the present embodiment, the types and additional information ( A method of generating metadata) and the multiplexing process in the multiplexing unit will be described. In addition, the additional information (metadata) may be expressed as a parameter set or control information.

[0346] In this embodiment, the Figure 4 The dynamic object (three-dimensional point cloud data that changes with time) described in the above will be described as an example, but the same method can be used also in the case of a static object (three-dimensional point cloud data at an arbitrary time).

[0347] Figure 24 This is a diagram showing the configuration of the encoding unit 4801 and the multiplexing unit 4802 included in the three-dimensional data encoding apparatus according to the present embodiment. The encoding unit 4801 corresponds to, for example, the first encoding unit 4630 or the second encoding unit 4650 described above. The multiplexing unit 4802 corresponds to the...

Embodiment approach 3

[0381] In HEVC encoding, there is a tool for data division such as slices and tiles in order to enable parallel processing by a decoding device, but PCC (Point Cloud Compression: Point Cloud Compression) encoding is not yet available.

[0382] In PCC, various data division methods can be considered according to parallel processing, compression efficiency, and compression algorithm. Here, the definitions of slices and tiles, their data structures, and their transmission and reception methods will be described.

[0383] Figure 28 This is a block diagram showing the configuration of the first encoding unit 4910 included in the three-dimensional data encoding apparatus according to the present embodiment. The first encoding unit 4910 generates encoded data (encoded stream) by encoding the point cloud data using the first encoding method (GPCC (Geometry based PCC)). The first encoding unit 4910 includes a dividing unit 4911 , a plurality of position information encoding units 49...

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Abstract

A three-dimensional data decoding method acquires a tile including a plurality of encoded three-dimensional points (S9921), calculates an angle (S9922) formed by a line segment connecting a predetermined position and a first reference point in the tile and a line segment connecting the first reference point and a second reference point different from the first reference point (S9922), determines whether the calculated angle satisfies a predetermined condition (S9923), and decodes the encoded three-dimensional points (S9921). When it is determined that the calculated angle satisfies a predetermined condition (YES in S9923), the plurality of encoded three-dimensional points included in the tile are decoded (S9924), and when it is determined that the calculated angle does not satisfy the predetermined condition (NO in S9923), the plurality of encoded three-dimensional points included in the tile are not decoded (S9925).

Description

technical field [0001] The present disclosure relates to a three-dimensional data decoding method and a three-dimensional data decoding device. Background technique [0002] In the future, devices and services utilizing 3D data will be widely used in large fields such as computer vision, map information, monitoring, infrastructure inspection, or image distribution for autonomous operation of automobiles and robots. Three-dimensional data is acquired by various methods, such as a distance sensor such as a rangefinder, a stereo camera, or a combination of a plurality of monocular cameras. [0003] As one of the representation methods of three-dimensional data, there is a representation method called a point cloud in which the shape of a three-dimensional structure is represented by a group of points in a three-dimensional space. Save the position and color of the point group in the point cloud. Although point clouds are expected to become mainstream as a representation of 3D...

Claims

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Application Information

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IPC IPC(8): H04N13/161H04N19/597H04N19/91H04N19/96
CPCH04N13/161H04N19/597H04N19/96H04N19/91G06T9/001G06T7/60
Inventor 韩中定P·拉桑P·米特拉比耶努鲁克黎庆龙井口贺敬杉尾敏康
Owner PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA
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