Television Image Processing Circuit for Seamless Channel Switching
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Solution Overview
Problem
Current television systems experience interruptions in image display when switching channels or resolutions, resulting in black screens due to the need to suspend image data transmission during decoding and processing.
Innovation Solution
A circuit and method that capture and store processed image data in memory, allowing continuous display by superimposing interface images onto stored data, ensuring seamless transitions during channel or resolution changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the television suspends image data transmission during channel or resolution switching to ensure proper decoding, then image decoding accuracy is improved, but image display continuity deteriorates causing black screens
Solution Approach 1:
The patent applies preliminary action by capturing and storing current image data in memory before channel or resolution switching occurs. This pre-captured image data serves as a fallback to maintain display continuity during the switching transition, preventing black screens while allowing the system to perform decoding operations for the new channel or resolution.
Solution Approach 2:
The patent introduces an intermediary mechanism - a memory buffer that stores image data - between the image processing circuit and display panel. This intermediary allows the display to continue showing previously captured image data while the system transitions to new content, thus maintaining display continuity without affecting decoding accuracy for the new channel or resolution.
2Reliability
If the television maintains continuous image data transmission during switching, then image display continuity is improved, but image decoding accuracy deteriorates causing inappropriate image data to be displayed
Solution Approach 1:
The system performs preliminary capture and storage of valid image data before switching operations. This pre-captured data is stored in memory and can be displayed continuously during transitions, ensuring display continuity while the system safely performs decoding for the new channel or resolution without risk of displaying inappropriate data.
3Speed
If the television processes and transmits image data in real-time, then image processing speed is improved, but image display stability during switching deteriorates causing interruptions
Solution Approach 1:
The patent captures and stores image data in advance before switching operations occur. This pre-captured data is held in memory ready for display, allowing the system to maintain stable continuous display during transitions while the image processing circuit continues to process new data at full speed for the next channel or resolution.
Solution Approach 2:
The memory buffer acts as an intermediary that decouples the real-time image processing from the display output during transitions. It stores pre-processed valid image data that can be displayed continuously while the system processes new data, thus maintaining display stability without slowing down the image processing speed.
Data Source
AI summary
A circuit applied to a television is provided. The television includes a memory and a display panel. The circuit includes an image processing circuit, a control circuit, an image capturing circuit and an output circuit. The image processing circuit processes image data to generate processed image data. The control circuit generates a control signal according to a switch signal. According to the control signal, the image capturing circuit captures the processed image data as predetermined image data and stores the predetermined image data to the memory. The output circuit transmits the predetermined image data to the display panel according to the control signal.