Video Deblocking Filtering Using Segmentation at Object Boundaries
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Solution Overview
Problem
Existing video coding techniques face challenges in achieving higher coding efficiency and improved image enhancement due to increasing image sizes, resolutions, and frame rates, particularly in deblocking filtering at object boundaries within images.
Innovation Solution
A video coding method and apparatus that utilize segmentation information to partition restored areas into separate objects, adjusting filter lengths and types based on spatial changes, and applying deblocking filters only where necessary to avoid filtering at object boundaries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If deblocking filtering is applied to all boundaries in restored areas, then blocking artifacts are reduced, but image quality deteriorates at object boundaries due to unnecessary filtering
Solution Approach 1:
The patent segments the restored area into multiple coding units and further divides boundaries into filtering boundaries and non-filtering boundaries based on segmentation information. This allows selective application of deblocking filtering only where needed, avoiding unnecessary filtering at object boundaries while maintaining artifact reduction in appropriate regions.
Solution Approach 2:
The patent applies different filtering strategies to different regions: strong filtering is applied to certain boundaries while weak or no filtering is applied to others based on segmentation information. This local differentiation optimizes both artifact reduction and preservation of object boundary details.
2Productivity
If filtering strength is increased to reduce blocking artifacts, then coding efficiency improves, but spatial detail at object boundaries is lost
Solution Approach 1:
The patent dynamically adjusts filter strength based on the type of boundary identified through segmentation information. Strong filtering is applied to boundaries where blocking artifacts are prominent, while weak or no filtering is applied to object boundaries, creating an adaptive filtering system that balances coding efficiency and detail preservation.
3Device complexity
If deblocking filtering is applied uniformly across all boundaries, then processing is simplified, but coding efficiency decreases due to unnecessary filtering operations
Solution Approach 1:
The patent uses segmentation information to classify boundaries into filtering and non-filtering categories, enabling selective filtering operations. This reduces the number of unnecessary filtering operations while maintaining a relatively simple processing framework based on the segmentation results.
Data Source
AI summary
A video coding method and an apparatus using a deblocking filtering based on segmentation information are disclosed. The video coding method and the apparatus perform deblocking filtering using segmentation information of an image to avoid performing filtering at the boundary of an object within the image.