Aperture compensation circuit

Details Aperture compensation circuit Aperture compensation circuit

1992-02-20

1993-04-20

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358166, H04N 5208

Patent

active

052047474

ABSTRACT:
An aperture compensation circuit which includes a first differentiating circuit for differentiating an input signal to its input terminal to provide a primary differentiated signal, a squaring circuit for squaring the primary differentiated signal to provide a first signal, a second differentiating circuit for differentiating the primary differentiated signal from the first differentiating circuit to provide a secondary differentiated signal as a second signal, and a dividing circuit for dividing the first signal by the second to provide a contour compensation signal which is not affected by the steepness degree of the input signal.

REFERENCES:
patent: 4223342 (1980-09-01), Tsuchiya et al.
patent: 4410912 (1983-10-01), Hess et al.
patent: 4802010 (1989-01-01), Skinner et al.

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