Patent ID: 8868417

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; window the segmented contents of the first audio signal buffer and the second audio signal buffer; estimate a noise power of the first audio signal buffer; control a first gain and a second gain adaptively based on the noise power, wherein the first gain is within a first predefined range and the second gain is within a second predefined range, wherein a sum of the first gain and the second gain is 100%; attenuate the second audio signal buffer with the first gain to generate a third audio signal buffer; attenuate the second audio signal buffer with the second gain to generate a fourth audio signal buffer; remove direct current components from the first audio signal buffer based on the noise power; calculate Linear Prediction Coding (LPC) coefficients of the first audio signal buffer; filter the fourth audio signal buffer by using the LPC coefficients of the first audio signal buffer to generate a fifth audio signal buffer; and add the third audio signal buffer to the fifth audio signal buffer to generate a sixth audio signal buffer, wherein the sixth audio signal buffer is outputted by the earpiece.