Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1981-08-21
1986-08-26
Psitos, Aristotelis M.
Facsimile and static presentation processing
Facsimile
Recording apparatus
H04N 944
Patent
active
046086102
ABSTRACT:
A jitter compensation system in a rotary recording medium reproducing apparatus having a motor for rotating a rotary recording medium, and a reproducing transducer including a reproducing element for reproducing a recorded video signal from said rotary recording medium, comprises a separation circuit for separating a horizontal synchronizing signal from the video signal reproduced by the reproducing transducer, a circuit for supplying a reference signal, a phase comparator for comparing phases of the separated horizontal synchronizing signal and the reference signal supplied thereto, to produce a phase comparison error signal, a circuit for displacing the reproducing element of the reproducing transducer along a relative scanning direction with respect to the rotary recording medium, in response to the output error signal of the phase comparator, a variable frequency oscillator supplied with the output error signal of the phase comparator, and controlled of the output oscillation frequency, a detection circuit for detecting the rotational phase of the motor, and a control circuit for comparing phases of outputs of the variable frequency oscillator and the detection circuit, and controlling the rotation of the motor by an output error signal obtained as a result of the phase comparison.
REFERENCES:
patent: 3419675 (1968-12-01), Kihara
patent: 3711641 (1973-01-01), Palmer
patent: 3871020 (1975-03-01), Wilber
patent: 3934262 (1976-01-01), Snopko
patent: 3959815 (1976-05-01), Rotter et al.
patent: 3965482 (1976-06-01), Burrus
patent: 4198658 (1980-04-01), Palmer
Bernat Louis
Psitos Aristotelis M.
Victor Company of Japan Ltd.
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