Image Decoding with Subpicture Partitioning for Compression Efficiency

Solution Overview

Problem

The increasing demand for high-resolution and high-quality images leads to higher transmission and storage costs due to the increased amount of information, necessitating a more efficient image compression technique.

Innovation Solution

A method and apparatus for improving image coding efficiency by partitioning a current picture into slices, deriving residual samples, and encoding/decoding based on partitioning information, including flags for subpicture presence and slice inclusion, to enhance compression efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If image data is transmitted using conventional wired/wireless broadband lines and stored using existing storage media, then high-resolution and high-quality images can be transmitted and stored, but transmission cost and storage cost increase

Engineering Contradiction:

Improveimage qualityVSAvoidtransmission cost

Core Design Contradiction:

Measurement precisionVSLoss of energy

Solution Approach 1:

The image is divided into multiple slices, where each slice contains a subset of coding tree blocks. This segmentation allows for selective transmission and processing of only the necessary portions of the image, reducing overall data volume while maintaining quality where needed.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different slices can be processed and transmitted with different levels of quality and precision based on their importance and content characteristics. This allows optimization of transmission cost versus image quality by applying higher quality to critical regions and lower quality to less important regions.

Inventive Principle:

Principle #3Local quality

2Measurement precision

If image data is transmitted using conventional wired/wireless broadband lines and stored using existing storage media, then high-resolution and high-quality images can be transmitted and stored, but transmission cost and storage cost increase

Engineering Contradiction:

Improveimage qualityVSAvoidamount of information

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The image is divided into multiple slices, where each slice contains a subset of coding tree blocks. This segmentation allows for selective transmission and processing of only the necessary portions of the image, reducing overall data volume while maintaining quality where needed.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of transmitting the complete high-resolution image, only the necessary portions (slices) are transmitted and processed. This partial action approach reduces the quantity of information while maintaining sufficient quality for the intended application.

Inventive Principle:

Principle #16Partial or excessive action

3Measurement precision

If a decoding apparatus decodes a current picture by deriving residual samples for each block, then image reconstruction is achieved, but processing time and computational complexity increase

Engineering Contradiction:

Improveimage reconstruction accuracyVSAvoiddecoding time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The image is divided into multiple slices, where each slice contains a subset of coding tree blocks. This segmentation allows for selective transmission and processing of only the necessary portions of the image, reducing overall data volume while maintaining quality where needed.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of processing the entire image, only the necessary portions (slices) are processed. This partial action approach reduces computational complexity and processing time while maintaining sufficient reconstruction accuracy for the transmitted regions.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS12581106B2Image decoding method and device therefor

Publication Date: 2026.03.17 LG ELECTRONICS INC

AI summary

A method for decoding an image by a decoding device, according to the present disclosure, can signal picture partitioning related information on the basis of a flag indicating whether sub-picture information exists and a flag indicating whether subpictures each include a single slice.