Video Processing Apparatus Dynamic Correction for Power and Visibility
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Solution Overview
Problem
Mobile terminal devices face increased power consumption when correcting luminance and color signals every frame, leading to reduced usage time and poor outdoor visibility due to sunlight interference, and issues with aspect ratio conversion and black no-picture areas affecting image quality.
Innovation Solution
A video processing apparatus with an input unit, characteristic point detector, wallpaper area detector, and corrector that adjusts correction characteristics based on detected data to minimize power consumption and maintain image quality, especially in outdoor conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If picture quality correction is applied to the video signal every frame, then image quality is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic correction by detecting scene changes and adjusting correction characteristics only when necessary. The system transitions from static frame-by-frame correction to dynamic correction triggered by scene change detection, reducing unnecessary processing while maintaining image quality when needed.
Solution Approach 2:
The patent changes the parameter of correction frequency from every frame to event-driven (scene change detected). By monitoring scene change detection results and adjusting correction characteristics dynamically, the system reduces processing operations while maintaining image quality, thereby lowering power consumption.
2Manufacturing precision
If picture quality correction is applied to the video signal, then image quality is improved, but outdoor visibility under sunlight deteriorates
Solution Approach 1:
The patent dynamically adjusts correction characteristics based on scene change detection. By detecting scene changes and adapting correction parameters accordingly, the system can maintain image quality while reducing excessive correction that worsens outdoor visibility, thereby mitigating sunlight interference effects.
3Manufacturing precision
If picture quality correction is applied to video signals with wallpaper areas, then the wallpaper portions change according to contents, but image stability deteriorates
Solution Approach 1:
The patent applies local quality control by detecting wallpaper areas and applying different correction strategies to different regions. The system identifies wallpaper portions and prevents correction from being applied to these stable background areas, while still applying correction to dynamic content areas, thereby maintaining image stability.
Solution Approach 2:
The patent implements dynamic detection of wallpaper areas and adjusts correction characteristics accordingly. By detecting the presence of wallpaper areas and modifying correction behavior in real-time, the system prevents flicker in pattern portions while maintaining picture quality correction where appropriate.
4Adaptability or versatility
If black no-picture areas are added for aspect ratio conversion, then aspect ratio adaptation is improved, but luminance and color information accuracy deteriorates
Solution Approach 1:
The patent applies local quality control by detecting black no-picture areas and excluding them from correction calculations. The system identifies these areas and prevents them from influencing luminance and color average value calculations, thereby maintaining measurement precision while preserving aspect ratio adaptation capability.
Data Source
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AI summary
A video processing apparatus includes a detector (155) which detects whether pattern portions such as wallpaper portions having a pattern or the like or no-picture area portions having a single color are contained besides contents in a video signal input thereto, and a corrector (152, 1510) which corrects the video signal. If the pattern portions are contained in the input video signal, the corrector is controlled so as not to correct the video signal.