METHODS AND APPARATUS FOR MITIGATING THE EFFECTS OF MICROPHONE OVERLOAD IN ECHO CANCELLATION SYSTEMS

摘要

The method and apparatus for echo and noise cancels the saturation of signals often occurring in source signals, including echo and / or noise, to minimize the adverse effects of saturation of such source signals. According to an exemplary embodiment, the filter coefficients of the adaptive filter are updated only when the dominant value of the source signal is within a predetermined range of possible source signal values. As a result, the signal response is not disturbed by the saturation of the source signal, and the adaptive filter can continue to provide the existing quality of echo suppression even after the saturation period.