Patent ID: 8600040
Filing Date: 2013-12-03
Classification: G10L,H04M

Abstract:
1. A method of providing convergence control for an adaptive echo canceller filter, the echo canceller filter having an adjustable convergence, the method comprising: receiving a microphone signal at a small filter, the small filter being separate from the adaptive echo canceller filter; applying the signal to the small filter and determining an error signal from the signal utilizing the small filter, the small filter adapting received signals; determining a first adaptation factor based upon the error signal and the microphone signal, according to a first signal analysis approach and determining a second adaptation factor based at least upon the microphone signal according to a second signal analysis approach; comparing the first adaption factor to the second adaptation factor and selecting a greater one of the first adaptation factor and the second adaptation factor; applying the selected adaptation factor to the echo canceller filter to control the convergence of the echo canceller filter.