??? ??? C f s ??? ( ??? m / K - 1 ) [0030] Where K is a constant, m is the Mel scale and fs is the sampling frequency. [0031] The Mel-frequency domain Wiener filter 308 takes the power spectrum information, namely, the Mel-frequency domain information 330 and an estimate of the noise power spectrum at a current frame, namely the Mel noise spectrum data 114, to dynamically provide a Mel-frequency