System for separating speech from background noise

Details System for separating speech from background noise System for separating speech from background noise

G - Physics

10

L

354/50

G10L 21/02 (2006.01) G10L 15/20 (2006.01)

Patent

CA 2031641

Abstract A digital signal processing system applies an adaptive filtering technique to sequences of energy estimates in each of two signal channels, one channel containing speech and environmental noise and the other channel containing primarily the same environmental noise. From the channel containing primarily environmental noise, a prediction is made of the energy of that noise in the channel containing both the speech and that noise so that the noise can be extracted from the mixture of speech and noise. The result is that the speech will be more easily recognizable by either human listeners or speech recognition systems. - 17 -

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