Video signal detector

Details Video signal detector Video signal detector

1981-09-28

1984-05-08

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307311, 307354, 307358, 382 25, 382 65, H03K 505, H03K 5153

Patent

active

044477740

ABSTRACT:
A video detector circuit is disclosed which develops a threshold level from a white or background peak signal in regions of low contrast, and from a combination of both white and black peak levels in regions of high contrast. The circuit is adjustable to compensate for variable affection performance of the detector.

REFERENCES:
patent: 3566281 (1971-02-01), Baumann
patent: 3599151 (1971-08-01), Harr
patent: 3912943 (1975-10-01), Wilson
patent: 4121121 (1978-10-01), Gabeler et al.
patent: 4227218 (1980-10-01), Vandling
K. S. Pennington, R. E. Shirley and D. A. VanHook, Circuit for Obtaining Variable Resolution Output from Linear Array Scanner, IBM TDB, vol. 21, No. 7, Dec. 1978, pp. 2684-2685.
W. R. Yount, Thresholding Circuit, IBM TDB, vol. 20, No. 8, Jan. 1967, pp. 3199-3200.
M. M. Siverling, Thresholder for Optical Scanners, IBM TDB, vol. 16, No. 8, Jan. 1974, pp. 2746-2747.
R. E. Penny, Dynamic Threshold Setting Circuit, IBM TDB, vol. 18, No. 6, Nov. 1975, pp. 1962-1965.

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