Patent ID: 8868418

Claim:
A communication device for generating enhanced audio signals, the communication device comprising: an earpiece configured to output audio signals; at least one microphone configured to acquire a first audio signal buffer, wherein the first audio signal buffer comprises a noise signal; a receiver configured to receive a second audio signal buffer, wherein the second audio signal buffer comprises a speech signal received through a communication channel; and a processor configured to: segment contents of the first audio signal buffer and the second audio signal buffer, the first audio signal buffer being continuously monitored and analyzed; window the segmented contents of the first audio signal buffer and the second audio signal buffer; calculate Linear Prediction Coding (LPC) coefficients of the first audio signal buffer; calculate a LPC spectrum from the LPC coefficients; calculate Fast Fourier Transform (FFT) of the second audio signal buffer; calculate a FFT magnitude spectrum of the second audio signal buffer; calculate a difference between the LPC spectrum and the FFT magnitude spectrum; selectively boost frequencies of the second audio signal buffer by at least 3 decibels (dB) when the difference is greater than 5 dB to modify the FFT magnitude spectrum of the second audio signal buffer; calculate an inverse FFT of the modified magnitude spectrum of the second audio signal buffer; and overlap and add the second audio signal buffer to generate a third audio signal buffer, wherein the third audio signal buffer is outputted by the earpiece, and wherein a memory is configured to store one or more of the first audio signal buffer, the second audio signal buffer, and the third audio signal buffer.