摘要 |
<p> An apparatus for reproducing from a magnetic tape (T) first and second video signals (S<Sub>cv</Sub>.S<Sub>sp</Sub>) which are frequency modulated on a carrier, the first video signal having the center frequency of the carrier lower than that of the second video signal is disclosed, which includes a demodulator (3) for demodulating the first and second video signals, a first low-pass filter (4) for filtering the first video signal demod- utated by the demodulator, the first low-pass filter having a first cut-off frequency (F<Sub>2</Sub>), a second low-pass filter (5) for filtering the second video signal demodulated by the demod- utator (3), the second low-pass filter having a second cut-off frequency (F<Sub>1</Sub>) which is lower than the first cut-off frequency (F<Sub>2</Sub>), a detector (20) connected prior to the demodulator (3) for detecting whether reproduced video signal is the first or second video signal and for generating a control signal in reeponse thereto and a switching circuit (6) for sypplying the cideo signals to an output terminal in accordance with the connteol signal from the detector.</p><p>There is also disclosed an apparatus for recording and reproducing a video signal, which includes a first modulator for frequency modulating a video signal with a first frequency carrier to produce a first video signal, a second modulator for frequency-modulating the video signal with a second frequency carrier to produce a second video signal, a recording head for recording the first and second video signals frequency-modulated by the first and second mod- ulafors on a magnetic tape, a reproducing head for reproducing the first and second video signals recorded on the magnetic tape, a detector for detecting whether the video signal reproduced from the magnetic tape is frequency-modulated with the first frequency carrier or with the second frequency carrier, and for generating a control signal, and a first switching circuit of selectively activating the first and second modulator in accordance with the control signal, a frequency of the carrier used in recording subsequent to reproducing being coincident with a frequency of the carrier used in the reproducing.</p> |