Acoustic echo cancellation based on cesptral analysis

In a teleconference system, the acoustic coupling between loudspeakers and microphones causes that, after talking, the user receives back his own voice. The use of adaptive filters based on the Wiener theory has been established during the last decades in acoustic echo cancellation. This paper proposes a new approach based on cepstral analysis to identify and cancel the echo path. The results show that the proposed method is able to achieve better estimates of the echo path than those obtained by some of the most used adaptive algorithms.