TV Video Processing OSD Blending De-interlace
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Solution Overview
Problem
Conventional TV systems face issues with image conflict and color mismatch when blending on-screen display (OSD) information with video signals, particularly due to difficulties in motion detection during the de-interlace process, leading to indistinct images.
Innovation Solution
A TV system comprising two IC chips and a display module, where one IC chip processes video signals and generates still images, which are then blended with de-interlaced video signals to ensure OSD information is displayed at the top layer of the screen, using separate transmission interfaces and logic modules for effective processing and display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If OSD information is blended with video signal before de-interlacing, then the OSD control circuit can generate controllable information on the screen, but motion detection difficulty causes image conflict and color mismatch
Solution Approach 1:
The patent applies preliminary action by performing de-interlacing on the video signal before blending it with the OSD information. This reordering of operations ensures that the video signal is properly processed first, eliminating motion detection issues that would otherwise cause image conflicts and color mismatches when OSD is overlaid.
2Adaptability or versatility
If OSD information is blended with motion video signal, then user interface functionality is achieved, but de-interlace motion detection becomes difficult
Solution Approach 1:
The patent resolves the motion detection difficulty by performing de-interlacing before OSD blending. This preliminary processing of the video signal separates the OSD generation function from the video processing function, allowing motion detection to work correctly on the video signal alone without the interference of static OSD elements.
3Loss of information
If OSD information is displayed on video signal, then information overlay is achieved, but indistinct images occur due to blending with motion
Solution Approach 1:
The patent improves image clarity by performing de-interlacing before blending OSD information with the video signal. This ensures that the video signal is fully processed and stabilized first, preventing indistinct images and maintaining sharp boundaries between the video content and the overlaid OSD information.
Data Source
AI summary
A video signal processing method applied for a TV system is disclosed. In this method, the received video signal is processed by a video decoding process, and then the decoded video signal is processed by a de-interlacing process. A still or corresponsively still image signal is generated and blended with the de-interlaced video signal to generate a blended signal which is displayed to make sure the OSD information can always be shown at the top layer of the screen of the LCD panel.