Processing apparatus using selectable period triangular or sawto

Details Processing apparatus using selectable period triangular or sawto Processing apparatus using selectable period triangular or sawto

1988-11-28

1991-01-29

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358298, 358456, H04N 140

Patent

active

049890980

ABSTRACT:
An image processing apparatus includes an input unit for inputting an image signal, a conversion unit for converting the image signal input from the input unit and outputting the converted image signal, and an output unit for outputting a pulse-width modulation signal based on the converted image signal output from the conversion unit. The output unit is operated in a fixed period processing mode regardless of an output characteristic of the pulse-width modulation signal, and outputs the pulse-width modulation signal. The conversion unit switches a conversion mode of the input image signal in association with the output characteristic of the pulse-width modulation signal.

REFERENCES:
patent: 3916096 (1975-10-01), Everett et al.
patent: 4782398 (1988-11-01), Mita
patent: 4811037 (1989-03-01), Arai
patent: 4819066 (1989-04-01), Miyagi
patent: 4831392 (1989-05-01), Dei
patent: 4847654 (1989-07-01), Honma et al.

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