Method and device for analyzing a return signal and adaptive echo canceller applicable.

摘要

Was subjected to the direct signal (sd (n)) to a linear prediction filter having finite impulse response (21) in order to determine a residual signal (in the minimum energy). It is subjected to the return signal (sr (n)) to a finite impulse response filter (24), whose coefficients are the same as those of the linear prediction filter of the direct signal in order to determine a second residual signal (gn ). It calculates the ratio (rho) of the energies (gamma, e) contained in the first and second signals residual. It determines whether the return signal contains the components other than the echo components of the direct signal by comparing the ratio calculated for a detection threshold (rhos).