A/V Receiving Device OSD Picture Quality Correction
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Solution Overview
Problem
In wireless display systems, the presence of an On Screen Display (OSD) leads to a difference in picture quality between regions where only the content video is displayed and regions where the OSD overlaps with the video signal, causing interference with the user's viewing experience.
Innovation Solution
An A/V receiving device equipped with a RF receiving module and a microcomputer that receives compressed RF packets from an A/V transmitting device, obtains picture quality value information based on OSD information, and outputs content video and OSD with corrected picture quality values to ensure consistent picture quality across all regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If compression and restoration are performed on video signal with OSD, then transmission efficiency is improved, but picture quality consistency deteriorates due to different compression characteristics in OSD area versus content video area
Solution Approach 1:
The patent applies local quality by differentiating the treatment of OSD area and content video area. The receiving device detects OSD presence and applies different picture quality correction values to different regions: a first correction value for OSD area and a second correction value for content video area. This regional differentiation resolves the contradiction by maintaining uniform picture quality across the entire screen while preserving the compression efficiency benefits.
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting picture quality correction values based on detected OSD information. The system changes the picture quality parameters (brightness, contrast, sharpness) differently for OSD and non-OSD regions, allowing the same compression algorithm to produce consistent visual results across different content types and regions.
2Manufacturing precision
If picture quality correction is applied to OSD area, then picture quality consistency is improved, but device complexity increases due to additional detection and correction mechanisms
Solution Approach 1:
The receiving device performs self-service by autonomously detecting OSD presence and applying appropriate picture quality corrections without requiring external intervention or complex external processing systems. The device uses its own resources to analyze the video signal, identify OSD regions, and apply corrections, thereby improving picture quality consistency while minimizing the need for additional external hardware or complex system architecture.
Data Source
AI summary
An object of the present disclosure may improve compression and restoration capabilities by compensating for or removing a change in picture quality that occurs when a transmitting device transmits a video including an OSD (On Screen Display) in a wireless display system.