Intra-Prediction MPM Selection for High-Resolution Image Coding

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Solution Overview

Problem

Existing image compression technologies fail to efficiently encode and decode high-resolution and high-quality images, leading to increased costs and bandwidth requirements.

Innovation Solution

A method and apparatus for encoding and decoding an image using intra prediction and a recording medium storing a bitstream generated by an image encoding method/apparatus of the present invention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional image compression technology is used for high-resolution and high-quality images, then image quality is maintained, but transmission and storage costs increase due to increasing data amounts

Engineering Contradiction:

Improveimage qualityVSAvoiddata amount

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The image is divided into multiple blocks, and each block is processed independently using intra-prediction. This segmentation allows the encoder to capture local patterns efficiently while reducing the overall data amount, as each block can be compressed based on its own characteristics rather than requiring full-image data

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent uses intra-prediction to pre-estimate pixel values within the current picture before actual encoding. By predicting pixel values based on already-encoded neighboring blocks, the system reduces the residual data that needs to be transmitted, thereby decreasing the final data amount while maintaining image quality

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If higher resolution and quality image data is transmitted or stored using conventional methods, then image quality is improved, but transmission and storage costs increase

Engineering Contradiction:

Improveimage qualityVSAvoidtransmission and storage costs

Core Design Contradiction:

Measurement precisionVSLoss of energy

Solution Approach 1:

The patent employs intra-prediction modes that adaptively select from multiple prediction directions and methods based on the local image characteristics. By changing the prediction parameters (mode, direction, reference block selection) dynamically, the system achieves better compression efficiency for high-resolution images, reducing the energy required for transmission and storage while maintaining quality

Inventive Principle:

Principle #35Parameter changes

3Ease of manufacture

If conventional image encoding methods are used, then implementation is simple, but compression efficiency is insufficient for high-resolution images

Engineering Contradiction:

Improveencoding simplicityVSAvoidcompression efficiency

Core Design Contradiction:

Ease of manufactureVSProductivity

Solution Approach 1:

The patent introduces an intra-prediction mechanism that acts as an intermediary between the original image data and the compressed representation. This intermediary process generates prediction blocks that closely match the original blocks, allowing the residual data to be much smaller and more efficiently compressed, thereby improving compression efficiency without significantly complicating the encoding process

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20250373818A1Image encoding/decoding method and device, and recording medium storing bit stream

Publication Date: 2025.12.04 INTELLECTUAL DISCOVERY CO LTD

AI summary

The present invention relates to an image encoding/decoding method and apparatus. The image decoding method according to the present invention may comprise configuring an MPM list based on intra-prediction modes of neighbor blocks of a current block and a number of frequencies of the intra-prediction modes of the neighbor blocks, deriving an intra-prediction mode of the current block based on the MPM list, and performing intra-prediction for the current block based on the intra-prediction mode.