| 摘要 |
A video overlay image converter to perform various functions of shifting, inverting, rotating, and mirroring a picture image as displayed on a personal computer without increasing the load of the CPU, in real time, and with ease, by adding an image converter between the video controller and the image memory of the personal computer. The converter includes a video RAM for storing luminance and chrominance of the picture image; a video controller for storing data on the image memory or controlling the image memory to display data stored in the image memory after reading and outputting it; a converter which can change an image memory space with an address index data of the image memory between the video controller and the image memory; and a first bus transmitter for luminance data and chrominance data, which transmits synchronized image data, and is connected between the video controller and the image memory.
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