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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 encoding method, applied in image encoding, image data processing, digital video signal modification and other directions, can solve the problem of large amount of point group data, and achieve the effect of reducing the amount of processing

Pending Publication Date: 2022-01-14
PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA
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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

[0160] When point cloud coded data is used in an actual device or service, it is desirable to transmit and receive required information according to usage in order to suppress network bandwidth. However, such a function does not exist in the encoding structure of the three-dimensional data so far, and therefore there is no encoding method corresponding to it.

[0161] In this embodiment, a three-dimensional data coding method and a three-dimensional data coding device for providing a function of transmitting and receiving required information in accordance with usage in three-dimensional point cloud coded data, as well as the A three-dimensional data decoding method and 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 will be described.

[0162] In particular, currently, the first encoding method and...

Embodiment approach 2

[0291] In this embodiment, the type and additional information ( Metadata) generation method and multiplexing processing in the multiplexing unit will be described. In addition, additional information (metadata) may be expressed as parameter sets or control information.

[0292] In this embodiment, to Figure 4 The dynamic object (three-dimensional point cloud data that changes with time) described in .

[0293] Figure 24 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 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 multiplexing unit 4634 or 4656 described above.

[0294] The encoding unit 4801 encodes point cloud data of a plurality of PCC (Point Cloud Compression) frames to generate a plurality of enco...

Embodiment approach 3

[0342] In HEVC encoding, there is a tool for dividing data such as slices or tiles in order to enable parallel processing by a decoding device, but there is no such thing as PCC (Point Cloud Compression: Point Cloud Compression) encoding.

[0343] In PCC, various data division methods can be considered depending on parallel processing, compression efficiency, and compression algorithm. Here, the definitions, data structures, and transmission and reception methods of slices and tiles will be described.

[0344] Figure 29 It is a block diagram showing the configuration of the first encoding unit 4910 included in the three-dimensional data encoding device 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 division unit 4911 , a plurality of position information encoding units 4912 , a pluralit...

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Abstract

A three-dimensional data encoding method sets, in a plurality of items of position information for a plurality of three-dimensional points included in point cloud data, a hierarchy structure having a plurality of depths and a plurality of layers each including at least one depth (S8881), generates a plurality of items of first encoding data for each depth by encoding the plurality of items of position information for each depth (S8882), and generates a bitstream containing a plurality of items of second encoding data, the second encoding data being the encoding data for each layer and containing one or more items of first encoding data for one or more depths included in the corresponding layer (S8883). The bitstream contains first information indicating the data length of each of the plurality of items of second encoding data.

Description

technical field [0001] The invention 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] Devices and services that make full use of 3D data will become popular in the future in large fields such as computer vision, map information, surveillance, infrastructure inspection, and image distribution for autonomous operations of cars and robots. The three-dimensional data is obtained by various methods such as a distance sensor such as a range finder, a stereo camera, or a combination of multiple monocular cameras. [0003] As one of the representation methods of three-dimensional data, there is a representation method called a point cloud, which represents the shape of a three-dimensional structure through a point group in a three-dimensional space. Save the position and color of the point cloud in the point cloud. Altho...

Claims

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Application Information

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IPC IPC(8): H04N19/597G06T9/40
CPCH04N19/597G06T9/40H04N19/70G06T9/001
Inventor 井口贺敬杉尾敏康
Owner PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA
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