# US 12,225,189 B2 · Image encoding/decoding method and apparatus and recording medium for storing bitstream

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- Number: US 12,225,189 B2
- Document ID: US12225189B2
- Status: Granted
- Kind: B2
- Application number: 18/411,515
- Filed: 2024-01-12
- Published: 2024-05-09
- Granted: 2025-02-11
- Earliest claimed: 2016-10-11
- Assignees: Electronics and Telecommunications Research Institute
- Applicants: Electronics and Telecommunications Research Institute
- Inventors: Jung Won Kang; Sung Chang Lim; Hyun Suk Ko; Ha Hyun Lee; Jin Ho Lee; Dong San Jun; Seung Hyun Cho; Hui Yong Kim; Jin Soo Choi
- Web page: https://patentgrep.com/patent/US12225189B2

## CPC

- H04N 19/105: Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
- H04N 19/119: Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks
- H04N 19/132: Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
- H04N 19/159: Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
- H04N 19/176: the region being a block, e.g. a macroblock
- H04N 19/186: the unit being a colour or a chrominance component
- H04N 19/70: characterised by syntax aspects related to video coding, e.g. related to compression standards
- H04N 19/96: Tree coding, e.g. quad-tree coding
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

The present invention relates to an image encoding method and an image decoding method. The image decoding method includes partitioning a picture into a plurality of coding units, constructing a coding unit group including at least one coding unit of the plurality of coding units, obtaining coding information in units of one coding unit group, and decoding at least one coding unit of the plurality of coding units included in the coding unit group by using the obtained coding information.

## Claims

### Claim 1

A method for decoding an image, the method comprising:
constructing a coding unit group including at least one of a plurality of coding units divided from the image;
obtaining coding information of the coding unit group; and
decoding at least one of the plurality of coding units included in the coding unit group by using the coding information,
wherein the coding information is determined based on a size of the coding unit group,
wherein the plurality of coding units are decoded based on the coding information of the coding unit group,
wherein prediction modes of the plurality of coding units included in the coding unit group are determined to be an identical prediction mode,
wherein the identical prediction mode of the plurality of coding units in the coding unit group is determined to be an intra prediction mode based on the coding information,
wherein the plurality of coding units constructing the coding unit group have a continuous coding order, and
wherein the coding unit group and the plurality of coding units have a square shape.

### Claim 2

A method of encoding an image, the method comprising:
constructing a coding unit group including at least one of a plurality of coding units divided from the image; and
signaling coding information of the coding unit group,
wherein the coding information is determined based on a size of the coding unit group,
wherein the plurality of coding units are encoded, the coding information being determined based on the plurality of coding units,
wherein prediction modes of the plurality of coding units included in the coding unit group are determined to be an identical prediction mode,
wherein the identical prediction mode of the plurality of coding units in the coding unit group is determined to be an intra prediction mode,
wherein the plurality of coding units constructing the coding unit group have a continuous coding order, and
wherein the coding unit group and the plurality of coding units have a square shape.

### Claim 3

A method of transmitting a bitstream generated by an encoding method, the encoding method comprising:
constructing a coding unit group including at least one of a plurality of coding units divided from the image; and
signaling coding information of the coding unit group into the bitstream,
wherein the coding information is determined based on a size of the coding unit group,
wherein the plurality of coding units are encoded, the coding information being determined based on the plurality of coding units,
wherein prediction modes of the plurality of coding units included in the coding unit group are determined to be an identical prediction mode,
wherein the identical prediction mode of the plurality of coding units in the coding unit group is determined to be an intra prediction mode,
wherein the plurality of coding units constructing the coding unit group have a continuous coding order, and
wherein the coding unit group and the plurality of coding units have a square shape.