Write clock generator for time base corrector including frequenc

Details Write clock generator for time base corrector including frequenc Write clock generator for time base corrector including frequenc

1986-03-12

1988-08-30

Cardillo, Raymond F.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358321, 358324, 358338, 360 361, H04N 595

Patent

active

047681039

ABSTRACT:
A write clock generator for a time base corrector incorporated in a video tape recorder can generate a write clock signal including accurate phase and frequency fluctuation information on a reproduced video signal in spite of a simple circuit configuration. A write clock signal is generated from a VCO oscillated in response to a reproduced burst signal, and further the VCO is so controlled on the basis of frequency difference between the oscillated write clock signal and a frequency fluctuation signal such that the frequency difference may be eliminated. The frequency fluctuation signal is generated in response to a horizontal synchronizing signal so as to include time base fluctuations in a reproduced video signal.

REFERENCES:
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patent: 3971063 (1976-07-01), Michael et al.
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patent: 4063279 (1977-12-01), Vidovic et al.
patent: 4438456 (1984-03-01), Yoshinaka
patent: 4577236 (1986-03-01), Takanashi
patent: 4594616 (1986-06-01), Dischert
patent: 4597019 (1986-06-01), Nishimoto et al.
patent: 4613827 (1986-09-01), Takamori et al.

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