Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1979-10-22
1982-01-26
Cardillo, Jr., Raymond F.
Facsimile and static presentation processing
Static presentation processing
Attribute control
3581286, 360 36, 360 38, H04N 576
Patent
active
043131298
ABSTRACT:
A system for compensating and correcting errors in the time base of video signals read from a video disc in which the errors are corrected first coarsely in response to phase differences between horizontal sync signals of the video signals following which a fine correction is made in response to measured phase differences of burst signals of the video signal. A first phase detector produces an output signal in response to phase differences between the burst signals and an output of a reference frequency generator operating at the burst frequency. A second phase detector produces an output signal in response to phase differences between the horizontal signals and the reference signal divided down by a predetermined factor. The output signals of the two phase detectors are summed and then applied to the control input of a variable delay line which adjusts the delay time and hence phase errors in the video signal accordingly.
REFERENCES:
patent: 3578902 (1971-05-01), Monsay
patent: 3580991 (1971-05-01), Krause
patent: 3921202 (1975-11-01), Dann et al.
patent: 4150395 (1979-04-01), Pritchard
patent: 4220968 (1980-09-01), Scholz
Cardillo, Jr. Raymond F.
Universal Pioneer Corporation
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