Adaptive Loop Filtering With Non-Regional Reference Samples
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Solution Overview
Problem
Existing video compression techniques face challenges in achieving high coding efficiency and image enhancement due to increasing image sizes, resolutions, and frame rates, particularly in utilizing upsampling or super-resolution techniques for in-loop filtering of chroma components.
Innovation Solution
Adaptive loop filtering (ALF) is performed using temporally adjacent reference samples and intra block copy (IBC) to determine reference samples for improved video encoding/decoding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If video data is stored or transmitted without compression processing, then video quality is preserved, but a large amount of hardware resources including memory is required
Solution Approach 1:
The patent extracts and utilizes only the necessary reference samples from the video data for compression processing. By selectively using reference samples from temporally adjacent pictures and IBC reference samples, the system achieves effective compression while minimizing the quantity of data that needs to be stored and processed, thus reducing hardware resource requirements while maintaining video quality.
2Reliability
If image size, resolution, and frame rate are increased, then video quality is improved, but the amount of data to be encoded increases
Solution Approach 1:
The patent changes the parameters used for reference sampling by utilizing temporally adjacent pictures and IBC techniques. This allows the system to maintain high video quality with increased resolution and frame rate while reducing the amount of data to be encoded by using more efficient reference sample selection and prediction methods.
3Productivity
If existing compression techniques are used, then coding efficiency is achieved, but image enhancement effect is limited
Solution Approach 1:
The patent introduces dynamic adaptive loop filtering that operates on reconstructed blocks using reference samples from temporally adjacent pictures and IBC. This dynamic filtering process enhances image quality by adaptively reducing artifacts while preserving coding efficiency, going beyond the capabilities of existing static compression techniques.
Data Source
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AI summary
The present disclosure discloses video encoding/decoding method and apparatus and provides a video decoding method including generating from a bitstream a reconstructed block of a current block, and performing filtering by inputting the reconstructed block into an adaptive loop filter (ALF), wherein the performing of the filtering includes determining one or more reference samples of the current block by using at least one of an inter-prediction mode or an intra block copy (IBC), and performing the filtering by using the one or more reference samples.