Speech discriminator

Details Speech discriminator Speech discriminator

G - Physics

10

L

354/50

G10L 15/00 (2006.01) G10L 11/02 (2006.01)

Patent

CA 1134043

ABSTRACT OF THE DISCLOSURE A speech to noise discriminator for analyzing a low-frequency signal and distinguishing the presence of speech comprises n bandpass filters (where n is at least equal to 3) centered respectively on three fre- quencies of the speech signal band; the filters are followed respectively by n detection and integration circuits which therefore produce signals having an amplitude Ai (i = 1, 2 ... n) which is representative of the mean amplitude of the signal to be analyzed within the bands of the n filters comparison means determine whether the ratios Aj/Al (with j = 2, 3 ... n) satisfy predetermined linear equations and thus make it possible to distinguish the presence of speech in the signal to be analyzed.

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