Adaptive Loop Filter Gating for Video Compression Efficiency
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Solution Overview
Problem
Existing video coding technologies face challenges in achieving optimal compression efficiency while maintaining subjective quality, particularly with the adoption of advanced standards like VVC, where certain filtering processes can introduce inefficiencies.
Innovation Solution
The method and apparatus disable cross-component adaptive loop filter (CCALF) and chroma adaptive loop filter (ALF) processes, as well as dependent quantization (DQ) and sign data hiding (SDH), based on specific conditions in the video content, to enhance compression efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If cross-component adaptive loop filter (CCALF) and chroma adaptive loop filter (ALF) processes are enabled, then filtering quality is improved, but compression efficiency deteriorates
Solution Approach 1:
The patent changes the operational parameters of filtering processes by selectively disabling CCALF and chroma ALF under specific conditions (when certain syntax elements are not present in the bitstream). This parameter change approach allows the system to adapt filtering quality to match the actual needs of the video content, improving compression efficiency without sacrificing necessary filtering performance.
Solution Approach 2:
The patent introduces dynamic control of filtering processes based on the presence or absence of specific syntax elements in the bitstream. The filtering behavior is no longer static but adapts dynamically to the coding conditions, enabling the system to switch between filtering and non-filtering modes to optimize the trade-off between quality and compression efficiency.
2Productivity
If dependent quantization (DQ) and sign data hiding (SDH) are enabled, then coding efficiency is improved, but device complexity increases
Solution Approach 1:
The patent changes the operational state of DQ and SDH processes by disabling them under specific conditions (when certain syntax elements are not present). This parameter adjustment reduces processing complexity in scenarios where these advanced coding tools are not beneficial, while preserving coding efficiency gains when they are needed.
Solution Approach 2:
The patent implements dynamic enabling/disabling of DQ and SDH based on the presence of specific syntax elements in the bitstream. This dynamic control allows the decoding device to adjust its processing complexity according to the actual coding mode being used, avoiding unnecessary computational overhead while maintaining coding efficiency when required.
Data Source
AI summary
The present disclosure provides systems and methods for processing video content. The method can include: receiving a bitstream comprising video content; determining whether a first signal associated with the video content satisfies a given condition; and in response to the determination that the first signal satisfies the given condition, disabling both a cross component adaptive loop filter (CCALF) process and a chroma adaptive loop filter (ALF) process.