Combined SAO and Bilateral Filter for Video Coding Efficiency
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Solution Overview
Problem
Existing video coding technologies face inefficiencies due to the independent application of multiple in-loop filters, which consume excessive processor cycles, memory, and memory bandwidth, leading to potential degradation in video quality.
Innovation Solution
The harmonization of a sample adaptive offset filter with a bilateral filter to create a combined filter, reducing the need for separate buffers and reads, thereby improving coding efficiency by consolidating processing and memory utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple in-loop filters are applied independently, then video quality is maintained or improved, but processor cycles and memory usage increase
Solution Approach 1:
The patent combines the SAO filter and bilateral filter into a single unified filter that performs both sample adaptive offset correction and bilateral filtering operations in one processing pass, rather than applying them as separate independent filters. This merging reduces the number of processing operations and improves processor cycle efficiency while maintaining the video quality benefits of both filtering techniques.
2Reliability
If multiple in-loop filters are applied independently, then video quality is maintained or improved, but memory and memory bandwidth utilization increase
Solution Approach 1:
The unified filter consolidates the memory structures required for SAO filtering and bilateral filtering into a single buffer system. By merging the filter operations, the patent eliminates the need for separate buffers for each filter stage, thereby reducing overall memory usage and memory bandwidth consumption while preserving video quality.
3Adaptability or versatility
If separate filters are used for SAO and bilateral filtering, then filtering functionality is comprehensive, but device complexity increases
Solution Approach 1:
The patent creates a universal filter structure that performs multiple filtering functions (SAO offset correction and bilateral filtering) within a single device. This multi-functional unified filter maintains the comprehensive filtering capabilities of separate filters while reducing structural complexity by eliminating redundant components and processing stages.
Data Source
AI summary
In general, techniques are described by which to obtain combined in-loop filters for video coding. A device for coding video data comprising a memory and one or more processors may be configured to perform the techniques. The memory may store the video data. The one or more processors, which may be implemented in circuitry, are configured to implement a combined sample adaptive offset and bilateral filter. The combined sample adaptive offset and bilateral filter may be configured to obtain reconstructed samples of a current block of the video data, and perform filtering with respect to the reconstructed samples of the current block of the video data to obtain filtered reconstructed samples of the current block of the video data.