Automatic boost control in an aperture corrector for TV video si

Details Automatic boost control in an aperture corrector for TV video si Automatic boost control in an aperture corrector for TV video si

1977-04-22

1978-06-27

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 514, H04N 522

Patent

active

040978974

ABSTRACT:
A closed loop automatic boost control of an aperture correction circuit for a television camera using a high pass filter and thresholding circuitry in order to control the frequency boost by sensing the RMS value of the high frequency noise. The boost is achieved by separating the signal into a flat response and a high frequency boosted response. The amount of boost is determined by passing the high frequency boosted response through a variable gain amplifier.

REFERENCES:
patent: 3730987 (1973-05-01), Radecke

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