| 摘要 |
PURPOSE:To make a device applicable as a hard copy device for video signals of 625 horizontal scanning lines by providing a conversion means an image forming device for NTSC. CONSTITUTION:When NTSC video signals are selected by NTSC/PAL switching signals inputted in a terminal T3, a multiplexer 16 selects an output of an NTSC decoder 12, and outputs synchronizing signals VSH, HSH to a sampling timing signal generator 18. When a PAL video signal is selected, the multiplexer 16 selects the PAL decoder 14 and connects switches 22 and 26 to the upper side. Therefore, the data converted into A/D by respective A/D converters 20R, 20G and 20B are inputted respectively in conversion circuits 24R, 24G, and 24B to convert original picture data for six picture elements into 5 picture elements.
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