Patent ID: 8654827
Filing Date: 2014-02-18
Classification: H04B,H04L

Abstract:
1. A method for identifying minor echoes present in an input signal in the situation where two or more major echoes, also present in the input signal, have already been identified, the method comprising: (a) computing a weighted power spectrum S (b) subtracting the weighted power spectrum S (c) determining an intermediate spectrum based at least in part on the difference spectrum and the spectrum F; (d) estimating one or more of the minor echoes from a time-domain signal to obtain echo parameters for the one or more minor echoes, wherein the time-domain signal is determined based on the intermediate spectrum; and (e) storing the echo parameters for the one or more minor echoes in a memory, wherein the echo parameters are usable to remove at least a portion of the one or more estimated minor echoes from the input signal.