# US 12,764,330 B2 · Point cloud data transmission device, point cloud data transmission method, point cloud data reception device, and point cloud data reception method

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,764,330 B2
- Document ID: US12764330B2
- Status: Granted
- Kind: B2
- Application number: 18/579,774
- Filed: 2022-07-18
- Published: 2024-10-31
- Granted: 2026-10-13
- Earliest claimed: 2021-07-16
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Hyunmook Oh
- Web page: https://patentgrep.com/patent/US12764330B2

## CPC

- H04N 19/597: specially adapted for multi-view video sequence encoding
- G06T 17/00: Three-dimensional [3D] modelling for computer graphics
- H04N 19/139: Analysis of motion vectors, e.g. their magnitude, direction, variance or reliability
- H04N 19/159: Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
- H04N 19/513: Processing of motion vectors
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL

## Abstract

A point cloud data transmission method according to embodiments may comprise the steps of: encoding point cloud data; and transmitting signaling information and the encoded point cloud data, wherein the encoding of the point cloud data may include the steps of: dividing a tree structure including the point cloud data into one or more layer groups; acquiring motion vectors of each of the layer groups by performing motion estimation for each of the layer groups; and compressing the point cloud data by performing inter-prediction on the basis of the motion vectors of each of the layer groups.

## Claims

### Claim 1

A method of encoding point cloud data, the method comprising:
encoding the point cloud data; and
transmitting the encoded point cloud data and signaling information,
wherein
a tree structure including the point cloud data is segmented into one or more layer group,
wherein each of the one or more layer-groups includes one or more subgroups, and
wherein the encoding of the point cloud data is performed in units of subgroups,
wherein the signaling information includes first identification information for identifying each layer group, second identification information for identifying each subgroup, origin information for specifying an origin position of a bounding box of a subgroup identified by the first identification information and the second identification information, size information for specifying a size of the bounding box of the subgroup, first length information for specifying a length in bits of the origin information, and second length information for specifying a length in bits of the size information.

### Claim 2 (depends on 1)

The method of claim 1, wherein a layer group of the one or more layer groups is a group of consecutive layers of the tree structure.

### Claim 3

A device for encoding point cloud data, the device comprising:
an encoder configured to encode the point cloud data; and
a transmitter configured to transmit the encoded point cloud data and signaling information,
wherein
a tree structure including the point cloud data is segmented into one or more layer group,
wherein each of the one or more layer-groups includes one or more subgroups,
wherein the encoding is performed in units of subgroups, and
wherein the signaling information includes first identification information for identifying
each layer group, second identification information for identifying each subgroup, origin information for specifying an origin position of a bounding box of a subgroup identified by the first identification information and the second identification information, size information for specifying a size of the bounding box of the subgroup, first length information for specifying a length in bits of the origin information, and second length information for specifying a length in bits of the size information.

### Claim 4 (depends on 3)

The device of claim 3, wherein a layer group of the one or more layer groups is a group of consecutive layers of the tree structure.

### Claim 5

A method of decoding point cloud data, the method comprising:
receiving the point cloud data and signaling information; and
decoding the point cloud data based on the signaling information,
wherein a tree structure including the point cloud data is segmented into one or more layer groups,
wherein each of the one or more layer-groups includes one or more subgroups,
wherein the decoding of the point cloud data is performed in units of subgroups based on the signaling information, and
wherein the signaling information includes first identification information for identifying each layer group, second identification information for identifying each subgroup, origin information for specifying an origin position of a bounding box of a subgroup identified by the first identification information and the second identification information, size information for specifying a size of the bounding box of the subgroup, first length information for specifying a length in bits of the origin information, and second length information for specifying a length in bits of the size information.

### Claim 6 (depends on 5)

The method of claim 5, wherein a layer group of the one or more layer groups is a group of consecutive layers of the tree structure.

### Claim 7

A device for decoding point cloud data, the device comprising:
a receiver configured to the point cloud data and signaling information; and
a decoder configured to decode the point cloud data based on the signaling information,
wherein a tree structure including the point cloud data is segmented into one or more layer groups,
wherein each of the one or more layer-groups includes one or more subgroups,
wherein the decoding of the point cloud data is performed in units of subgroups based on the signaling information, and
wherein the signaling information includes first identification information for identifying each layer group, second identification information for identifying each subgroup, origin information for specifying an origin position of a bounding box of a subgroup identified by the first identification information and the second identification information, size information for specifying a size of the bounding box of the subgroup, first length information for specifying a length in bits of the origin information, and second length information for specifying a length in bits of the size information.

### Claim 8 (depends on 7)

The device of claim 7, wherein a layer group of the one or more layer groups is a group of consecutive layers of the tree structure.