Write clock pulse generator used for a time base corrector

Details Write clock pulse generator used for a time base corrector Write clock pulse generator used for a time base corrector

1985-12-11

1987-12-22

Goldberg, E. A.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358324, 358339, 360 362, H04N 989, H04N 585, H04N 578

Patent

active

047149655

ABSTRACT:
In a time base corrector for correcting time base fluctuations of signals reproduced from a record medium, on which a plurality of time-compressed component signals occurring within one horizontal period in a predetermined sequential order are recorded in response to a clock signal with a predetermined frequency, a write clock pulse generator used in the time base corrector includes a phase shifter for shifting the phase of an incoming write clock signal, whereby the write clock signal having a frequency different from the predetermined frequency is generated in response to a horizontal synchronizing signal, the start time of each of the plurality of reproduced component signals is detected and the shifting amount of the write clock signal by the phase shifter is switched in accordance with the detected output so as to synchronize the write clock signal with the start time of each of the reproduced component signal.

REFERENCES:
patent: 4015288 (1977-03-01), Ebihara et al.
patent: 4069499 (1978-01-01), Ninomiya
patent: 4077046 (1978-02-01), Morio
patent: 4109277 (1978-08-01), Schylander
patent: 4422103 (1983-12-01), Kanamaru
patent: 4445092 (1984-04-01), Yoshinaka et al.

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