Intra Block Copy Prediction Reordering for Subblock Video Coding

Solution Overview

Problem

Existing video coding techniques face challenges in efficiently compressing and enhancing video quality due to increasing image sizes, resolutions, and frame rates, particularly in intra block copy mode, where current blocks are processed as single units without considering subblocks.

Innovation Solution

A method and apparatus for video coding that involves reconstructing current blocks by reordering initial predicted signals using block vectors, splitting the current block into subblocks based on a splitting direction and ratio, and generating a final prediction block by rearranging these subblocks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the current block is processed as a single block in IBC mode, then the encoding process is simple, but the video coding efficiency and image quality are insufficient

Engineering Contradiction:

Improvevideo coding efficiencyVSAvoidprocessing complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The current block is divided into multiple subblocks (e.g., four subblocks) along horizontal and vertical directions. Each subblock is independently predicted using IBC mode with its own block vector, allowing finer-grained optimization of prediction accuracy while maintaining manageable processing complexity through systematic subdivision.

Inventive Principle:

Principle #1Segmentation

2Manufacturing precision

If the current block is processed as a single block in IBC mode, then the processing complexity is low, but the image quality and coding efficiency are insufficient

Engineering Contradiction:

Improveimage qualityVSAvoidprocessing complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The current block is divided into multiple subblocks (e.g., four subblocks) along horizontal and vertical directions. Each subblock is independently predicted using IBC mode with its own block vector, allowing finer-grained optimization of prediction accuracy while maintaining manageable processing complexity through systematic subdivision.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different block vectors are applied to different subblocks based on local characteristics. Each subblock can have its own motion compensation parameters, allowing the prediction to adapt to local variations in the image content, thereby improving overall image quality through localized optimization.

Inventive Principle:

Principle #3Local quality

3Productivity

If subblocks are used in IBC mode, then video coding efficiency is improved, but the processing complexity increases

Engineering Contradiction:

Improvevideo coding efficiencyVSAvoidprocessing complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The current block is divided into multiple subblocks (e.g., four subblocks) along horizontal and vertical directions. Each subblock is independently predicted using IBC mode with its own block vector, allowing finer-grained optimization of prediction accuracy while maintaining manageable processing complexity through systematic subdivision.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies subblock processing selectively rather than universally. The encoder can choose to divide blocks into subblocks when beneficial for coding efficiency, while maintaining the option to process entire blocks when subblock processing would not provide sufficient benefit, thus balancing complexity and efficiency improvements.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS20260025513A1Method and device for video coding using rearrangement of prediction signals in intra block copy mode

Publication Date: 2026.01.22 HYUNDAI MOTOR CO LTD

AI summary

A method and an apparatus are disclosed for video coding using reordering of predicted signals in intra block copy mode. In the disclosed embodiments, a video decoding device obtains a splitting direction of the current block and obtains a ratio of subblocks with respect to the current block. Here, the splitting direction indicates a horizontal split or a vertical split. The video decoding device generates an initial prediction block of the current block according to an intra block copy (IBC) mode. The video decoding device splits the initial prediction block into subblocks based on the splitting direction and the ratio of the subblocks and generates a final prediction block of the current block by reordering the subblocks.