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Appratus and mthod for overlay of images in video presenting system having embedded operationg system and there of driving method
Appratus and mthod for overlay of images in video presenting system having embedded operationg system and there of driving method
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机译:具有嵌入式操作系统的视频呈现系统中图像叠加的装置和方法及其驱动方法
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摘要
An apparatus and a method for overlaying an image in a video presenting system at which an embedded operating system is mounted are provided to output two images after overlaying the images by realizing an overlay function at a final output end without using an internal processor of a CPU. A real image unit(100) includes the followings. A VGA(Video Graphic Array) engine(107) signal-processes a first image or second image, which is selected as an main image, in a signal which enables the display of the second image, and outputs the selected first and second images on the main image after overlaying those two images by signal-processing the first and second images according to overlay information. A microcomputer(109) communicates with an embedded unit(200) periodically to the second image and the overlay information from the embedded unit to the VGA engine, and controls the signal-processing of the VGA engine according the selected main image and sub image.
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