Unified Intra Prediction Mode Lists for Video Coding

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Solution Overview

Problem

Current video coding technologies face inefficiencies and reduced performance due to varying methods for constructing intra candidate prediction mode lists, leading to increased complexity and decreased decoding accuracy and efficiency.

Innovation Solution

A method for determining M candidate prediction modes based on neighboring prediction blocks, constructing an intra prediction mode list, and performing intra prediction to improve coding efficiency and accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If different intra prediction technologies use different processes to construct a candidate prediction mode list, then various prediction methods can be implemented, but coding complexity increases and efficiency decreases

Engineering Contradiction:

Improveprediction method flexibilityVSAvoidcoding complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent establishes a unified candidate prediction mode list construction process that can accommodate multiple intra prediction technologies (angular prediction modes and non-angular prediction modes) through a single standardized procedure. This universal approach allows different prediction methods to be implemented without requiring separate construction processes, thereby reducing coding complexity while maintaining versatility.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the construction processes of candidate prediction mode lists from different intra prediction technologies into a single unified process. By combining the procedures for angular and non-angular prediction modes, the patent eliminates redundant operations and simplifies the overall coding process, directly addressing the complexity issue while preserving the ability to handle various prediction types.

Inventive Principle:

Principle #5Merging (Combining)

2Adaptability or versatility

If different processes are used to construct candidate prediction mode lists, then various prediction technologies can be supported, but coding efficiency and performance are reduced

Engineering Contradiction:

Improveprediction technology supportVSAvoidcoding efficiency

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The unified construction process serves multiple prediction technologies simultaneously, allowing the system to support both angular and non-angular prediction modes through a single standardized procedure. This universality eliminates the need for separate construction processes for each prediction type, thereby improving coding efficiency while maintaining broad technology support.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

By merging the construction processes into a single unified procedure, the patent reduces the total number of operations required during coding. This consolidation streamlines the workflow and decreases processing time, directly enhancing coding efficiency while still supporting diverse prediction technologies through the unified process.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If multiple different construction processes are used, then various prediction modes can be implemented, but decoding accuracy and efficiency decrease

Engineering Contradiction:

Improveprediction mode varietyVSAvoiddecoding accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The unified construction process provides consistent and standardized procedure for generating candidate prediction mode lists that works across all prediction modes. This standardization ensures that the same reliable process is applied universally, maintaining decoding accuracy while supporting various prediction modes through the single unified approach.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the construction processes into a unified procedure that ensures consistency and reliability in generating candidate prediction mode lists. This consolidation eliminates variations in the construction process that could lead to decoding inaccuracies, thereby improving decoding accuracy while still supporting multiple prediction modes through the unified process.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20250330593A1Video decoding method, video encoding method, decoder, encoder and computer-readable storage medium

Publication Date: 2025.10.23 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

Provided in the embodiments of the present application are a video decoding method, a video encoding method, a decoder, an encoder and a computer-readable storage medium. The video decoding method comprises: parsing a bitstream to determine a first intra prediction flag corresponding to a current block; determining, according to prediction modes corresponding to one or more positions neighboring to the current block, M candidate prediction modes corresponding to the first intra prediction flag, wherein M is a positive integer; constructing an intra prediction mode list based on the M candidate prediction modes, and performing intra prediction on the current block based on the intra prediction mode list, to determine a prediction block of the current block; determining a reconstructed block of the current block based on the prediction block of the current block.