Speech signal detector having adaptive threshold values

Details Speech signal detector having adaptive threshold values Speech signal detector having adaptive threshold values

1984-08-24

1987-10-13

Kemeny, E. S. Matt

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

G10L 500

Patent

active

047003928

ABSTRACT:
Speech presence is detected by first comparing input signal absolute value versus a first threshold which is proportional to input signal RMS noise power, accumulating the first comparison output signal, then comparing the accumulated signal versus a second threshold signal which is proportional to a hangover time signal. The first and second threshold signals are used to form up to six threshold values.

REFERENCES:
patent: 3832493 (1974-08-01), Clark
patent: 4000369 (1976-12-01), Paul et al.

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