Patent ID: 6654412
Filing Date: 2003-11-25
Classification: H03H

Abstract:
A learning method for an adaptive filter to eliminate real output signals generated by input signals and an environment signal response, the adaptive filter receiving the input signals and generating estimated output signals according to a filter coefficients and the input signals, the learning method comprising the steps of:(a) storing the input signals and the real output signals within a past time period; (b) generating a predictive input signal according to the input signals to predict one of the input signals at a time in the future; (c) generating a predictive output signal according to the real output signals to predict one of the real output signals at a time in the future; and (d) updating the filter coefficients according to the predictive input signal, the predictive output signal, one of the input signals and one of the real output signals to cause the estimated signals approximate to the real output signals.