| 摘要 |
A video interface system can cope with a plurality of printers having different clock signal frequencies with reduced timing skew between image data and a clock signal. The video interface system interfaces an image data supplying apparatus, such as a host computer, with a printer. The video interface system comprises a reference clock signal sending unit, provided in the image data supplying apparatus, for sending back a reference clock signal supplied by the printer by means of a loop back control. A shift register is provided in the image data supplying apparatus, and sends image data to the printer in synchronization with the reference clock signal supplied by the printer.
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