Signal discrimination circuit

Details Signal discrimination circuit Signal discrimination circuit

1993-11-02

1994-08-30

Mai, Tan V.

Boots, shoes, and leggings

36472401, G06G 702, G06F 1531

Patent

active

053434200

ABSTRACT:
A signal discrimination circuit is provided with: a prediction circuit for releasing a prediction signal that is formed by making a linear prediction based on a previous input signal; a differential operation circuit for calculating the difference between the input signal and the prediction signal so as to release a predicted remainder; and a decision circuit for determining whether or not the degree of the variation of the predicted remainder from the zero level is maintained within a predetermined range. Therefore, even if a sound signal having a time-wise correlation and white noise having no time-wise correlation possess wide frequency components respectively, both of the signals are discriminated by the decision circuit based on the difference in the correlation. Thus, the signal discrimination circuit ensures an accurate discrimination between a control signal for a facsimile containing white noise and a sound signal.

REFERENCES:
patent: 4587620 (1986-05-01), Niimi et al.
patent: 5054103 (1991-10-01), Yasuda et al.
patent: 5136531 (1992-08-01), McCaslin

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