Intra Prediction Mode Reordering for Lower-Bitrate Video Coding

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Solution Overview

Problem

Existing video coding technologies face inefficiencies in intra prediction mode signaling, leading to suboptimal compression and increased bit rates without maintaining video quality.

Innovation Solution

Implement methods for constructing and reordering intra prediction mode lists based on coded information and neighboring block data, and deriving variable binary codewords for non-most probable modes, enhancing encoding and decoding processes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If traditional intra prediction mode signaling is used, then video quality is maintained, but bit rate increases and coding efficiency decreases

Engineering Contradiction:

Improvecoding efficiencyVSAvoidbit rate

Core Design Contradiction:

Loss of informationVSQuantity of substance

Solution Approach 1:

The patent changes the parameters of intra prediction mode signaling by reordering modes in the MPM list based on probability and using variable-length binary codewords instead of fixed-length codes. This allows more probable modes to be encoded with fewer bits, directly reducing bit rate while maintaining coding accuracy

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces dynamic adaptation by deriving the MPM list based on neighboring block modes and current block characteristics, and by using variable codeword lengths based on mode probability. This dynamic approach allows the coding scheme to adapt to different video content, improving coding efficiency without sacrificing quality

Inventive Principle:

Principle #15Dynamics

2Quantity of substance

If intra prediction modes are reordered based on probability, then bit rate is reduced, but system complexity increases

Engineering Contradiction:

Improvebit rateVSAvoidcoding complexity

Core Design Contradiction:

Quantity of substanceVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-defining the ordering of intra prediction modes in the MPM list based on their probability of occurrence and neighboring block modes. This pre-ordering eliminates the need for complex real-time optimization during encoding, reducing computational complexity while still achieving bit rate reduction through more efficient coding of probable modes

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses simple, easily computable probability estimates based on neighboring block modes rather than complex, computationally expensive probability models. This approach achieves sufficient coding efficiency improvement without requiring complex devices or algorithms, keeping implementation costs low

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Data Source

PatentUS12610043B2Intra prediction modes signaling

Publication Date: 2026.04.21 BEIJING DAJIA INTERNET INFORMATION TECH CO LTD

AI summary

Methods, apparatuses, and non-transitory computer-readable storage mediums are provided for video coding. In one method, a decoder constructs an intra prediction mode list for a current video block based on intra prediction modes applied in the current video block and neighboring video block; and the decoder may reorder intra prediction modes in the intra prediction mode list based on coded information of the current video block or derived information of the current video block.