Television aperture correction system having gateable coring mea

Details Television aperture correction system having gateable coring mea Television aperture correction system having gateable coring mea

1975-05-21

1976-11-30

Martin, John C.

Telegraphy

Systems

Simplex-reversing periodic

178DIG25, H04N 514

Patent

active

039951081

ABSTRACT:
An aperture correction system employing a tapped delay line includes an integral detection/gating circuit, whereby the combination generates an improved video detail signal by removing the objectionable noise and low amplitude components which are emphasized during the aperture correction process, while retaining the original shape of the high frequency video detail transitions as enhanced by the aperture correction process. The objectionable noise cancellation is provided by selectively gating the aperture correction signal via the detection/gating circuit in response to a selected gating waveform provided from the video detail signal itself. The detection/gating circuit may be selectively disabled to cause severe attenuation of the waveform at selected low and high frequencies outside the passband of the system.

REFERENCES:
patent: 3665321 (1972-05-01), Michnik
patent: 3715477 (1973-02-01), Olson et al.
patent: 3789133 (1974-01-01), Kline
patent: 3804980 (1974-04-01), Lowry

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