Patent ID: 8005239

Claim:
A method for reducing audio noise in an audio signal acquisition, comprising: receiving an input audio signal; separating the input audio signal into a high-frequency portion and a low frequency portion based on a threshold frequency; synthesizing the low-frequency portion to at least reduce any audio noise therein to generate a new low-frequency portion, wherein synthesizing the low-frequency portion comprises: computing an energy level for each of a plurality of segments of the low-frequency portion; separating the plurality of segments of the low-frequency portion into a high-energy level group and a low-energy level group based on the energy levels of the plurality of segments of the low-frequency portion; randomly selecting the energy level for one segment in the low-energy level replacing the energy levels of all the segments in the high-energy level group with the selected energy level to at least reduce any noise therein; combining the high-energy level group having the selected energy levels for the segments therein with the low-energy level group to generate the new low-frequency portion; combining the high-frequency portion and the new low-frequency portion to form a new audio signal representing the input audio signal; and outputting the new audio signal for the audio signal acquisition.