Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1981-02-05
1983-09-06
Chin, Tommy P.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358325, 358324, H04N 5785
Patent
active
044032447
ABSTRACT:
An apparatus suited for correcting a variation in the time base of a reproduced signal in a video disc player comprises a frequency converter circuit for converting the frequency of the reproduced signal, a first time base compensating (APC) system including an automatic phase control loop for varying the frequency of the reproduced signal by controlling the phase of a converting signal supplied to the frequency converter circuit in dependence on a phase difference between the reproduced signal and a reference signal, and a second time base compensating system including a variable delay element controlled in dependence on a phase difference between the reproduced signal and the reference signal. Variation in the time base remaining uncorrected in the first compensating system is compensated by the second compensating system including the variable delay element.
REFERENCES:
patent: 3619491 (1971-11-01), Fujita
patent: 3758710 (1973-09-01), Grosno
patent: 3758711 (1973-09-01), Grosno
patent: 3921202 (1975-11-01), Dann
patent: 4057826 (1977-11-01), Baker
patent: 4099204 (1978-07-01), Lowe
patent: 4145705 (1979-03-01), Yoshinaka
patent: 4228460 (1980-10-01), Rotter
Chin Tommy P.
Hitachi , Ltd.
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