Method and device for noise reduction

Details Method and device for noise reduction Method and device for noise reduction

2004-07-12

2010-02-02

Chin, Vivian (Department: 2614)

Electrical audio signal processing systems and devices

Noise or distortion suppression

C381S094700, C381S092000, C381S071110, C381S071120, C704S226000, C704S233000, C379S406010, C379S406050, C379S406080, C379S406090

Reexamination Certificate

active

07657038

ABSTRACT:
In one aspect of the present invention, a method to reduce noise in a noisy speech signal is disclosed The method comprises: applying at least two versions of the noisy speech signal to a first filter, whereby that first filter outputs a speech reference signal and at least one noise reference signal, applying a filtering operation to each of the at least one noise reference signals, and subtracting from the speech reference signal each of the filtered noise reference signals, wherein the filtering operation is performed with filters having filter coefficients determined by taking into account speech leakage contributions in the at least one noise reference signal.

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