receiving unit to the controller 10 the controller 10 performs required operations in response to the commands and data thus transferred the i o control circuit 70 the personal computer pc and the video recorder vp are connected to allow mutual transmission of control signals cs and thereby mutual control of their operations 0052 fig4 is a block diagram illustrating the internal structure of the filter unit 220 r corresponding to the r signal rs the other filter units 220 g and 220 b corresponding to the g signal gs and the b signal bs have an identical structure with that of the filter unit 220 r the following thus regards only the structure of the filter unit 220 r corresponding to the r signal rs the filter unit 220 r includes an input selector 222 a filter circuit 224 and an output selector 226 the filter circuit 224 has four filters lpf10 lpf40 lpf75 and lpf120 these filters lpf10 lpf40 lpf75 and lpf120 are low pass filters having cut off frequencies fc of 10 mhz 40 mhz 75 mhz and 120 mhz each filter may be actualized by any of commercially available filter elements for example chip emi suppression filters fk2125t series and fk2125tz series manufactured by taiyo yuden co ltd diverse filters may be obtained by.