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Color video signal recording and reproducing apparatus
| Details |
Inventors: Ichinoi, Yutaka;
Assignee: Victor Company of Japan, Ltd. (JP)
Primary Examiner: Richardson; Robert L.
Assistant Examiner:
Attorney, Agent or Firm: Andrus, Sceales, Starke & Sawall
A color video signal recording and reproducing apparatus comprises a first circuit for producing a luminance signal which has or has not been subjected to a time base compression, a second circuit for forming a time base compressed line-sequential color difference signal, a circuit for generating a time-division-multiplexed signal by time-division-multiplexing output signals of the first and second circuits, a circuit for obtaining a frequency modulated signal by frequency-modulating a carrier by a low-frequency component of the time-division-multiplexed signal, a first converter for producing a low-band converted high-frequency time-division-multiplexed signal, a circuit for recording on a recording medium a signal in which at least the output signal of the first converter and the frequency modulated signal are frequency-division-multiplexed and for reproducing the same, a demodulator for obtaining a reproduced low-frequency time-division-multiplexed signal from the reproduced signal, a second converter for obtaining a reproduced high-frequency time-division-multiplexed signal from the reproduced signal, and a circuit for forming a reproduced color video signal which is in conformance with a standard system, from output signals of the demodulator and the second converter. |
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DETAILED DESCRIPTION Accordingly, it is a general object of the present invention to provide a novel and useful color video signal recording and reproducing apparatus in which the disadvantages described heretofore have been eliminated.
Another and more specific object of the present invention is to provide a color video signal recording and reproducing apparatus in which a time-division-multiplexed signal in which a time base compressed line-sequential color difference signal and a luminance signal are time-division-multiplexed, is band-divided into a high-frequency component and a low-frequency component, a frequency modulated signal is obtained by frequency-modulating a carrier by the low-frequency component, a low-band converted high-frequency time-division-multiplexed signal is obtained by frequency-converting the high-frequency component to a frequency band which is lower than the frequency band of the frequency modulated signal, a frequency-division-multiplexed signal is obtained by frequency-division-multiplexing the frequency modulated signal and the low-band converted high-frequency time-division-multiplexed signal, the frequency-division-multiplexed signal is recorded on a recording medium, and a reproduced color video signal is obtained by subjecting a signal which is reproduced from the recording medium to a signal processing which is in reverse to the signal processing performed at the time of the recording.
According to the apparatus of the present invention, it is possible to widen the frequency band in which the luminance signal and the color difference signals can be recorded and reproduced, compared to the existing recording and reproducing apparatus which employs the low-band conversion recording and reproducing system.
Further, it is also possible to widen the frequency band in which the luminance signal and the color difference signals can be recorded and reproduced, compared to the recording and reproducing apparatus which records an FM audio signal and a video signal on the same track
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TV Signal 
