Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
108 words
In a video signal recording and reproducing apparatus comprising means (6) for frequency modulating at least a luminance signal of the color video signal for recording and means (16) for,frequency demodulating the frequency-modulated signal for reproduction, thus producing a reproduction video signal; the improvement further comprising means (32) for separating a high frequency component from said demodulated reproduction video signal, a slice circuit (33) including a nonlinear element impressed with the separated high frequency component, and means (35) for subtracting said sliced signal and said reproduction video signal substantially at the desired ratio, thus dampening the crosstalks and noises of the edge component of said reproduction video signal.
Claim 2
Dependent Claim
108 words
In a video signal recording and reproducing apparatus comprising means (6) for frequency modulating at least a luminance signal of the color video signal for recording and means (16) for,frequency demodulating the frequency-modulated signal for reproduction, thus producing a reproduction video signal; the improvement further comprising means (32) for separating a high frequency component from said demodulated reproduction video signal, a slice circuit (33) including a nonlinear element impressed with the separated high frequency component, and means (35) for subtracting said sliced signal and said reproduction video signal substantially at the desired ratio, thus dampening the crosstalks and noises of the edge component of said reproduction video signal.
Claim 3
Dependent Claim
44 words
A video signal recording and reproducing apparatus according to Claim 1, further comprising means (4) for emphasizing the high frequency component of said reproduction video signal more with the increase in the amplitude of the edge component in a recording section thereof in advance.
Claim 4
Dependent Claim
30 words
A video signal recording and reproducing apparatus according to Claim 1, further comprising a circuit (38) coinciding in timing said reproduction video signal with said high frequency component separated therefrom.
Claim 5
Dependent Claim
59 words
A video signal recording and reproducing apparatus according to Claim 1, further comprising a phase correcting circuit (37) by which the phases of said two signals coincide with each other in a predetermined frequency range, said phase correcting circuit being inserted in selected one of the signal paths of said reproduction video signal and said separated high frequency component.
Claim 6
Dependent Claim
137 words
In a video signal recording and reproducing apparatus comprising means for frequency converting at least a luminance signal of the color video signal for recording and means for frequency demodulating the frequency-modulated signal for reproduction, thus producing a reproduction video signal; the improvement further comprising means (50) for separating a high frequency component from said demodulated signal, a slice circuit (53) including a nonlinear element impressed with said separated high frequency component, means (47) for subtracting the sliced signal and said reproduction video signal one from the other substantially at the desired ratio, a limiter (52) including a nonlinear element for compressing said separated high frequency component, and means (48) for subtracting said compressed signal and said reproduction video signal one from the other at the desired ratio, thereby reducing the noises of said reproduction video signal.
Claim 7
Dependent Claim
137 words
In a video signal recording and reproducing apparatus comprising means for frequency converting at least a luminance signal of the color video signal for recording and means for frequency demodulating the frequency-modulated signal for reproduction, thus producing a reproduction video signal; the improvement further comprising means (50) for separating a high frequency component from said demodulated signal, a slice circuit (53) including a nonlinear element impressed with said separated high frequency component, means (47) for subtracting the sliced signal and said reproduction video signal one from the other substantially at the desired ratio, a limiter (52) including a nonlinear element for compressing said separated high frequency component, and means (48) for subtracting said compressed signal and said reproduction video signal one from the other at the desired ratio, thereby reducing the noises of said reproduction video signal.