Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1985-09-27
1987-08-18
Masinick, Michael A.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358158, 358149, 375120, 307269, 307514, 328 72, 328155, H04N 504
Patent
active
046880941
ABSTRACT:
The phase of a reproduction reference signal RS output from a decoder, which decodes the count value of the counter, is compared with that of an arriving horizontal synchronizing signal TH by a phase comparator. Based on this comparison result, a phase discriminating circuit discriminates whether the phase of the reproductionreference signal RS is advanced, delayed or in-phase with the arriving horizontal synchronizing signal TH. Based on this phase discrimination result, the dividing ratio setting circuit sets the dividing ratio of the counter such that the reproduction reference signal TH is pulled in with the arriving horizontal synchronizing signal TH.
REFERENCES:
patent: 3936762 (1976-02-01), Cox, Jr. et al.
patent: 4151485 (1979-04-01), LaFratta
patent: 4423520 (1983-12-01), Murayama et al.
TI Semiconductor Technical Data; SN 54LS297, SN 74LS297; by Japanese Texas Instruments Co., Ltd.; Nov. 1, 1983.
Noguchi Minoru
Tanabe Toshiyuki
Kabushiki Kaisha Toshiba
Masinick Michael A.
Parker Michael D.
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