Video signal noise reduction circuit

Details Video signal noise reduction circuit Video signal noise reduction circuit

1987-08-03

1989-07-25

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 521

Patent

active

048519111

ABSTRACT:
High-frequency portions of the video signals are substantially damped at low signal levels by including, selectively, a low-pass filter (12) in circuit with a signal path, selectively, in accordance with the setting of a transfer switch (13), the setting of which is controlled as a function of the signal level with respect to a threshold (U.sub.St), which may vary, for example in accordance with amplification of a signal being received from a television camera tube system (1,2,3).

REFERENCES:
patent: 3700803 (1972-10-01), Rhee
patent: 4412253 (1983-10-01), Oguino
patent: 4509078 (1985-04-01), Kuroda
patent: 4723166 (1988-02-01), Stratton

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