Apparatus for recording and reproducing a video signal

DETAILED DESCRIPTION Accordingly, it is an object of the present invention to provide an apparatus for recording and reproducing a video signal which avoids the above-mentioned disadvantages of the prior art.
More specifically, it is an object of the present invention to provide an apparatus for recording and reproducing a video signal and in which a recording system thereof can remove or attenuate an undesired side band component in the wide band range, thereby suppressing a moire component.
Another object of the present invention is to provide an apparatus for recording and reproducing a video signal in which the reproducing system thereof can improve the signal-to-noise ration (S/N ratio).
According to an aspect of the invention, a recording system for recording a video signal on a record medium having a characteristic of a limiter comprises: frequency-modulating means to which an input video signal is fed for generating a sine wave modulated signal; phase rotating means connected to the frequency-modulating means for successively rotating a phase of an output signal of the frequency-modulating means so that the phase of a high-order frequency component is shifted by approximately 180 degrees; amplifying means connected to the output of the phase rotating means for amplifying the rotated output signal so as to enable the signal level thereof to be recorded; and recording means for recording the output signal of the amplifying means on the record medium.
According to another aspect of the invention, a reproducing system for reproducing a video signal recorded on a record medium, as aforesaid, comprises: pick-up means for retrieving the video signal recorded on the record medium; noise reduction means connected to the pick-up means and including at least two serially connected signal processing circuits, each having a limiter circuit with an input which receives an input signal for equalizing an amplitude of upper and lower side band components of the input signal, a high-pass filter connected to the limiter circuit so as to receive an output signal of the limiter circuit, a low-pass filter having an input connected to the input of the limiter circuit so as to receive its input therefrom and an adder for adding output signals of the high-pass filter and low-pass filter; and demodulating means for demodulating an output signal of the last of the serially arranged signal processing circuits