Contour correcting circuit

Details Contour correcting circuit Contour correcting circuit

1983-06-15

1985-09-10

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 37, 358162, H04N 516

Patent

active

045410143

ABSTRACT:
A contour correcting circuit emphasizes the contour of a video signal by increasing the rise and fall characteristics of the signal by using a high frequency extraction circuit in combination with a delay circuit and an adder adding in the delay output to the extracted signal. An amplitude limiter limits the adder output to between upper and lower limits of the input video signal and a second delayed signal.

REFERENCES:
patent: 3715473 (1973-02-01), Tan
patent: 3732360 (1973-05-01), Breimer
patent: 3995108 (1976-11-01), Morrison
patent: 4360830 (1982-11-01), Poetsch

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