Echo detection

Details Echo detection Echo detection

H - Electricity

04

B

H04B 3/20 (2006.01) G10L 21/02 (2006.01)

Patent

CA 2630635

An echo detector includes means (34) for forming a set of distance measures between pitch estimates of a first signal and pitch estimates of a second signal at predetermined delays with respect to the first signal. A selector (36) selects a distance measure from the set corresponding to the highest similarity between the first and second signals. A classifier (32) classifies the second signal as including an echo if the selected distance measure has a predetermined relation to a similarity threshold (TH)

L'invention porte sur un détecteur d'échos comprenant un moyen (34) d'élaboration d'un ensemble de mesures de distance entre des estimations de fréquence fondamentale d'un premier signal, et des estimation de fréquence fondamentale d'un deuxième signal, un certain temps après le premier signal. A cet effet un sélecteur (36) sélectionne une mesure de distance dans l'ensemble donnant la plus grande similitude entre le premier signal et le deuxième, et un classificateur (32) classe le deuxième signal comme comprenant un écho, si la mesure de distance sélectionnée présente une relation prédéterminée avec un seuil de similitude (TH).

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