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

A technology of three-dimensional data and coding method, which is applied in image coding, image data processing, instruments, etc., can solve the problem of large amount of point group data, and achieve the effect of improving coding efficiency

Pending Publication Date: 2021-02-12
PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA
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  • Summary
  • 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 encoding method, three-dimensional data decoding method, three-dimensional data encoding device, and three-dimensional data decoding device
  • Three-dimensional data encoding method, three-dimensional data decoding method, three-dimensional data encoding device, and three-dimensional data decoding device
  • 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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Embodiment approach 1

[0133]When using the coded data of the point cloud 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, there is no such function in the coding structure of 3D data so far, and therefore there is no corresponding coding method.

[0134]In this embodiment, it will be explained that a three-dimensional data encoding method and a three-dimensional data encoding device are used to provide the function of transmitting and receiving necessary information according to the application in the encoded data of the three-dimensional point cloud. A three-dimensional data decoding method and a three-dimensional data decoding device 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.

[0135]In particular, currently, the first coding method and t...

Embodiment approach 2

[0218]In this embodiment, a method of storing NAL units in an ISOBMFF file will be described.

[0219]ISOBMFF (ISO based media file format) is a file format standard specified in ISO / IEC14496-12. ISOBMFF specifies a format that can reuse and store various media such as video, audio, and text, and is a standard that does not depend on media.

[0220]The basic structure (file) of ISOBMFF is explained. The basic unit in ISOBMFF is the box. A box is composed of type (type), length (length), and data (data), and a collection of boxes that combine various types is a file.

[0221]Figure 14 It is a diagram showing the basic structure (file) of ISOBMFF. ISOBMFF files mainly include boxes such as ftyp whose brand is 4CC (4-character code), moov that stores metadata such as control information, and mdat that stores data.

[0222]In addition, the storage method for each medium of ISOBMFF files is specified. For example, the storage method of AVC video and HEVC video is specified by ISO / IEC14496-15. Here, ...

Embodiment approach 3

[0225]In this embodiment, the type and additional information of the encoded data (location information (Geometry), attribute information (Attribute), additional information (Metadata)) generated by the above-mentioned first encoding unit 4630 or second encoding unit 4650 The method of generating (metadata) and the multiplexing processing in the multiplexing unit will be described. In addition, additional information (metadata) is sometimes expressed as a parameter set or control information.

[0226]In this embodiment, theFigure 4 The dynamic object (time-varying three-dimensional point cloud data) described in the above will be described as an example, but the same method can also be used in the case of a static object (three-dimensional point cloud data at any time).

[0227]Figure 16 It is a diagram showing the configuration of the encoding unit 4801 and the multiplexing unit 4802 included in the three-dimensional data encoding device of this embodiment. The encoding unit 4801 corresp...

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Abstract

A three-dimensional data encoding method includes: acquiring third point cloud data, in which first point cloud data and second point cloud data are combined and which includes position information pertaining to each of a plurality of three-dimensional points included in the third point cloud data and identification information indicating to which of the first point cloud data and the second pointcloud data each of the plurality of three-dimensional points belongs (S5661); encoding the acquired third point cloud data and thereby generating encoded data (S5662); and, in generation, encoding the identification information of each of the plurality of three-dimensional points as the attribute information of the three-dimensional point.

Description

Technical field[0001]The present disclosure relates to a three-dimensional data encoding method, a three-dimensional data decoding method, a three-dimensional data encoding device, and a three-dimensional data decoding device.Background technique[0002]In larger fields such as computer vision, map information, monitoring, infrastructure inspection, or image distribution for cars or robots to work autonomously, devices or services that utilize 3D data will be popularized in the future. Three-dimensional data is obtained by various methods such as distance sensors, stereo cameras, or a combination of multiple monocular cameras.[0003]As a representation method of three-dimensional data, there is a representation method called point cloud, which expresses the shape of a three-dimensional structure through a point group in a three-dimensional space. The position and color of the point group are stored in the point cloud. Although it is expected that point clouds will become the mainstream...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T9/00
CPCG06T9/001G06T9/00G06T9/40
Inventor 杉尾敏康井口贺敬
Owner PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA