System and method for low-loss removal of stationary and non-stationary short-time interferences

A method of attenuating a noise signal within an input signal containing a target signal, and said noise signal, comprising the steps of:

• a. obtaining a digital representation of the input signal;
• b. obtaining a digital representation of the noise signal;
• c. partitioning said digital representation of the input signal into a plurality of overlapping input windows;
• d. selecting one or more of said input windows;
• e. calculating a input frequency spectrum from each of said selected input windows;
• f. determining two or more dominant peaks within each of said input window spectra, each of said dominant input frequency peaks corresponding to a dominant signal frequency;
• g. partitioning said digital representation of the noise signal into a plurality of overlapping noise windows;
• h. selecting one or more of said noise windows;
• i. calculating a noise frequency spectrum from each of said selected noise windows;
• j. using any of said calculated noise frequency spectra to identify two or more dominant noise frequency peaks and a corresponding two or more dominant noise frequencies;
• k. for each of said input windows, matching its dominant signal frequency peaks with said dominant noise frequency peaks;
• l. for each of said input windows, obtaining a count of a number of dominant signal frequency peaks that match said dominant noise frequency peaks;
• m. calculating an average count from all of said counts obtained from each of said input windows;
• n. identifying each input window whose count is greater than said average count;
• o. for each identified input window, using at least a portion of said matching frequencies within said identified input window to construct a transfer function for said identified input window and applying said transfer function to said identified input window, thereby producing a filtered block;
• p. combining each of said filtered blocks corresponding to each of said input windows and any of said input windows not identified to form a filtered input signal, thereby attenuating said noise signal within said target signal relative to said target signal;
• and,
• q. performing at least a portion of said filtered input signal for a user.