Patent ID: 8184819

Claim:
An acoustic noise reduction system, the system comprising: a voice activity detector that: detects whether substantially only noise is present in a portion of an input signal; in response to detecting that substantially only the noise portion of the input signal is present, provides the noise portion of the input signal to a noise statistics component, detects whether both a desired signal and the noise is present in a portion of the input signal; and in response to detecting that the signal and noise portion of the input signal is present, provides the signal and noise portion of the input signal to a signal+noise statistics component; a first signal statistics component that stores noise statistics associated with the noise portion of the input signal; a second signal statistics component that stores signal+noise statistics associated with the signal and noise portion of the input signal; and a spatial filter that filters the input signal to provide, at least in part, an output signal, the output signal being based, at least in part, upon a filtered input signal, the filtering being based, at least in part, upon a weighted error calculation based on the two classes of statistics.