# US 2025/0097464 A1 · Method and apparatus of encoding/decoding image data based on tree structure-based block division

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- Number: US 2025/0097464 A1
- Document ID: US20250097464A1
- Status: Published application
- Kind: A1
- Application number: 18/964,083
- Filed: 2024-11-29
- Published: 2025-03-20
- Earliest claimed: 2016-10-04
- Assignees: B1 Institute of Image Technology, Inc.
- Applicants: B1 Institute of Image Technology, Inc.
- Inventors: Ki Baek KIM
- Web page: https://patentgrep.com/patent/US20250097464A1

## CPC

- H04N 19/119: Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks
- H04N 19/597: specially adapted for multi-view video sequence encoding
- G06T 3/16: Spatio-temporal transformations, e.g. video cubism
- H04N 13/139: Format conversion, e.g. of frame-rate or size
- H04N 13/161: Encoding, multiplexing or demultiplexing different image signal components (for multi-view video sequence encoding H04N19/597)
- H04N 19/176: the region being a block, e.g. a macroblock
- H04N 19/513: Processing of motion vectors
- H04N 19/55: Motion estimation with spatial constraints, e.g. at image or region borders
- H04N 19/70: characterised by syntax aspects related to video coding, e.g. related to compression standards
- H04N 2013/0085: {Motion estimation from stereoscopic image signals}
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL

## Abstract

Disclosed are methods and apparatuses for image data encoding/decoding. A method of decoding an image includes receiving a bitstream in which the image is encoded; obtaining index information for specifying a block division type of a current block in the image; and determining the block division type of the current block from a candidate group pre-defined in the decoding apparatus. The candidate group includes a plurality of candidate division types, including at least one of a non-division, a first quad-division, a second quad-division, a binary-division or a triple-division. The method also includes dividing the current block into a plurality of sub-blocks; and decoding each of the sub-blocks with reference to syntax information obtained from the bitstream.

## Claims

### Claim 1

A method of decoding an image with a decoding apparatus, comprising:
obtaining syntax elements for the image from a bitstream;
generating a prediction block and a residual block by decoding the syntax elements;
reconstructing the image based on the prediction block and the residual block; and
performing a post image processing on the reconstructed image based on post image processing information included in the bitstream,
wherein the post image processing comprises padding at least one region to the reconstructed image.

### Claim 2 (depends on 1)

The method of claim 1, wherein the post image processing comprises resizing the reconstructed image.

### Claim 3 (depends on 2)

The method of claim 2, wherein the resizing is either increasing or decreasing the width or height of the reconstructed image.

### Claim 4

A method of encoding an image with an encoding apparatus, comprising:
generating a prediction block and a residual block for the image;
obtaining syntax elements for the prediction block and the residual block;
encoding the syntax elements into a bitstream; and
encoding post image processing information into the bitstream,
wherein the post image processing information is used for performing a post image processing on a reconstructed image, the reconstructed image is obtained based on the prediction block and the residual block, and
wherein the post image processing comprises padding at least one region to the reconstructed image.

### Claim 5

A computer readable recoding medium storing a bitstream which is generated by a method of encoding an image, the method of encoding comprises:
generating a prediction block and a residual block for the image;
obtaining syntax elements for the prediction block and the residual block;
encoding the syntax elements into a bitstream; and
encoding post image processing information into the bitstream,
wherein the post image processing information is used for performing a post image processing on a reconstructed image, the reconstructed image is obtained based on the prediction block and the residual block, and
wherein the post image processing comprises padding at least one region to the reconstructed image.

### Claim 6

A method of transmitting a bitstream which is generated by a method of encoding an image, the method of encoding comprises:
generating a prediction block and a residual block for the image;
obtaining syntax elements for the prediction block and the residual block;
encoding the syntax elements into a bitstream; and
encoding post image processing information into the bitstream,
wherein the post image processing information is used for performing a post image processing on a reconstructed image, the reconstructed image is obtained based on the prediction block and the residual block, and
wherein the post image processing comprises padding at least one region to the reconstructed image.