Adaptive information signal discriminator

Details Adaptive information signal discriminator Adaptive information signal discriminator

1975-10-02

1977-03-15

Boudreau, Leo H.

Communications: electrical

Digital comparator systems

G06K 900

Patent

active

040127150

ABSTRACT:
In a character recognition system, an improved adaptive information signal discriminator for detecting an information signal when it varies over a wide range and/or when the background noise varies over a wide range. The discriminator is able to adaptively follow the widely varying background noise level by averaging the response time of the discriminator. The discrimination of a widely varying information signal is had by summing a portion of the information signal with the supra background averaged level. The discrimination may be repeated to develop the required sensitivities as required to accurately process the data.

REFERENCES:
patent: 3159815 (1964-12-01), Groce
patent: 3225213 (1965-12-01), Hinrichs et al.
patent: 3869698 (1975-03-01), Trost et al.
patent: 3911212 (1975-10-01), Yoshizawa et al.
Rackl, "Dynamic Threshold Circuit", IBM Tech. Disclosure Bulletin, vol. 15, No. 4, pp. 1138-1139, Sept., 1972.

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