Current-Picture Block Copy Prediction for Video Coding Efficiency

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Solution Overview

Problem

Existing video signal processing methods lack efficiency in coding, particularly in handling Block Copy (BC) and inter prediction modes for video compression.

Innovation Solution

The method involves determining the prediction mode of a current block and decoding or encoding it based on either BC or inter prediction modes, where spatial neighbor locations for BC include specific sets of locations, optimizing the processing to enhance coding efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If Block Copy prediction mode is used for current picture reference, then coding efficiency is improved, but complexity of determining spatial neighbor locations increases

Engineering Contradiction:

Improvecoding efficiencyVSAvoidcomplexity of determining spatial neighbor locations

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent merges the determination of spatial neighbor locations for Block Copy prediction mode with the existing inter prediction mode spatial neighbor locations. By setting the spatial neighbor locations for BC prediction mode to be identical to those for inter prediction mode, the patent eliminates the need for separate determination processes, thereby maintaining coding efficiency while reducing computational complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent applies universality by making the spatial neighbor location determination universal across both Block Copy prediction mode and inter prediction mode. The same set of spatial neighbor locations is used for both modes, allowing a single determination mechanism to serve multiple prediction functions, thus improving efficiency without increasing complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Measurement precision

If separate spatial neighbor locations are determined for BC and inter prediction modes, then prediction accuracy is improved, but processing time increases

Engineering Contradiction:

Improveprediction accuracyVSAvoidprocessing time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent combines the spatial neighbor location determination for Block Copy prediction mode with the inter prediction mode by using identical location sets for both modes. This merging approach maintains prediction accuracy through consistent spatial reference points while significantly reducing processing time by eliminating redundant determination operations.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent applies partial action by using only the necessary spatial neighbor locations that are common to both prediction modes. Instead of determining completely separate locations for each mode, the patent uses the overlapping set of locations that serve both purposes, thereby reducing processing time while maintaining adequate prediction accuracy for both modes.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS12568206B2Video signal processing method and device using current picture reference

Publication Date: 2026.03.03 VIDAXIO LLC

AI summary

A video signal processing method comprises: determining a prediction mode of a current block; when the prediction mode of the current block is a Block Copy (BC) prediction mode referring to a current picture, decoding the current block, based on the BC prediction mode; and when the prediction mode of the current block is an inter prediction mode referring to at least one picture, decoding the current block, based on the inter prediction mode.