# US 12,010,348 B2 · Image decoding method and device using deblocking filtering

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- Number: US 12,010,348 B2
- Document ID: US12010348B2
- Status: Granted
- Kind: B2
- Application number: 17/783,855
- Filed: 2020-12-10
- Published: 2023-02-09
- Granted: 2024-06-11
- Earliest claimed: 2019-12-12
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Hendry Hendry; Seunghwan Kim
- Web page: https://patentgrep.com/patent/US12010348B2

## CPC

- H04N 19/82: involving filtering within a prediction loop
- 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 19/117: Filters, e.g. for pre-processing or post-processing (sub-band filter banks H04N19/635)
- 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 19/14: Coding unit complexity, e.g. amount of activity or edge presence estimation (H04N19/146 takes precedence)
- H04N 19/172: the region being a picture, frame or field
- H04N 19/176: the region being a block, e.g. a macroblock
- H04N 19/182: the unit being a pixel
- H04N 19/50: using predictive coding (H04N19/61 takes precedence)
- H04N 19/70: characterised by syntax aspects related to video coding, e.g. related to compression standards
- H04N 19/86: involving reduction of coding artifacts, e.g. of blockiness
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

An image decoding method according to the present disclosure presents indication information related to whether deblocking parameters for a deblocking filtering procedure exist in a picture header or a slice header.

## Claims

### Claim 1

An image decoding method performed by a decoding apparatus, the method comprising:
receiving a bitstream, wherein the bitstream includes specific information specifying in which one of a picture header or a slice header information related to a tool for a current block is present, and prediction information;
obtaining, from one of the picture header or the slice header, the information related to the tool for the current block based on the specific information;
generating a prediction sample for the current block based on prediction information;
reconstructing a current picture based on the prediction sample and the information related to the tool for the current block; and
wherein the specific information is included in a high level syntax including a Picture Parameter Set (PPS).

### Claim 2

An image encoding method performed by an encoding apparatus, the method comprising:
generating a prediction sample for a current block;
reconstructing a current picture based on the prediction sample and a tool for the current block;
generating a prediction information and information related to the tool for the current block;
generating a specific information specifying in which one of a picture header or a slice header the information related to the tool for a current block is present; and
encoding image information including the prediction information and the specific information,
wherein the specific information is included in a high level syntax including a Picture Parameter Set (PPS).

### Claim 3

A non-transitory computer readable digital storage medium storing a bitstream generated by a method, the method comprising:
generating a prediction sample for a current block;
reconstructing a current picture based on the prediction sample and a tool for the current block;
generating a prediction information and information related to the tool for the current block;
generating a specific information specifying in which one of a picture header or a slice header the information related to the tool for a current block is present; and
encoding image information including the prediction information and the specific information to output the bitstream,
wherein the specific information is included in a high level syntax including a Picture Parameter Set (PPS).