| 摘要 |
PURPOSE: A device for record/playback of high resolution video is provided to improve resolution of video signal by changing frequency feature of filter and carrier frequency of FM modulation according to color signal of video signal to be recorded. CONSTITUTION: The device for record/playback of high resolution video includes a color killer determining part(210), a low-pass filter part(209), an FM modulating part(205) and a record equalizing part(206). The color killer determining part(210) determines whether color signal is in video signal. If color signal isn't in video signal, the color killer determining part(210) generates color killer controlling signal. If the color killer controlling signal is generated by inputting video signal, the low-pass filter part(209) sets up blocked frequency higher than color signal sub-carrier frequency. Otherwise, the low-pass filter part(209) sets up blocked frequency lower than color signal sub-carrier frequency. Then, the low-pass filter part(209) passes only low signal which is lower than blocked frequency. The FM modulating part(205) executes frequency modulation by inputting output signal of the low-pass filter part(209). If color killer controlling signal is not generated by inputting FM modulated signal, the record equalizing part(206) blocks frequency zone of low conversion color signal. If color killer controlling signal is generated, the record equalizing part(206) dose not block frequency zone of low conversion color signal and picks prescribed luminance signal frequency zone.
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