Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1981-08-26
1983-11-15
Psitos, Aristotelis M.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358326, H04N 944
Patent
active
044159366
ABSTRACT:
A jitter compensation system is used for a rotary recording medium reproducing apparatus having a reproducing transducer including a reproducing element for reproducing a color video signal from a rotary recording medium, where the color video signal has a carrier chrominance signal which has been converted into a low frequency range. The jitter compensation system comprises a separation circuit for separating a horizontal synchronizing signal from the color video signal reproduced by the reproducing transducer, a carrier chrominance signal separation circuit for separating a carrier chrominance signal from the color video signal reproduced by the reproducing transducer, a voltage controlled oscillator, a phase comparator supplied with the separated horizontal synchronizing signal and an output signal of the voltage controlled oscillator, for comparing phases of the signals supplied thereto and supplying an output error signal to the voltage controlled oscillator to control the oscillation frequency of the voltage controlled oscillator, a displacing mechanism responsive to the output error signal of the phase comparator, for displacing the reproducing element of the reproducing transducer towards a relative scanning direction with respect to the rotary recording medium, a frequency converter for frequency-converting the frequency of the separated carrier chrominance signal back to the original frequency, and a circuit for producing a signal for frequency conversion which is to be supplied to the frequency converter from the outputs of the voltage controlled oscillator and the frequency converter. The above phase comparator and the voltage controlled oscillator construct a phase locked loop.
REFERENCES:
patent: 3787616 (1974-01-01), Falk et al.
patent: 3871020 (1975-03-01), Wilber
patent: 3873990 (1975-03-01), Wilber
patent: 3940556 (1976-02-01), Boltz, Jr.
patent: 3965482 (1976-06-01), Burries
patent: 3967311 (1976-06-01), Fuhrer
patent: 4170783 (1979-10-01), Tajima
patent: 4190859 (1980-02-01), Kinjo
patent: 4313129 (1982-01-01), Fukui
Bernat Louis
Psitos Aristotelis M.
Victor Company of Japan Ltd.
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