Adaptive speech detector system

Details Adaptive speech detector system Adaptive speech detector system

H - Electricity

04

B

354/50

H04B 1/46 (2006.01) G10L 11/02 (2006.01)

Patent

CA 1227573

ABSTRACT A speech detector circuit for selectively transmitting speech signals while suppressing ambient sound related signals comprises an input from a microphone producing a speech signal and an input from a microrphone producing a noise signal. The circuit includes a comparator which compares the speech signal with peak values of the noise signal to produce a pulse signal which indicates when the speech signal exceeds a threshhold and a discriminator responsive to the pulse signal to produce a detected speech signal when the pulse signal occurs within a selected period which is spaced from a preceding pulse signal by a selected period. - 1 -

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