G - Physics – 10 – L
Patent
G - Physics
10
L
G10L 21/02 (2006.01) H03H 21/00 (2006.01) H04B 15/00 (2006.01)
Patent
CA 2538859
A method and apparatus for reducing echo in a communication system are provided. A first signal including a voice component associated to a speaker is received. The first signal is processed to derive a harmonic feature of the voice component. A second signal including an echo component correlated to the first signal is also received. The second signal is processed at least in part on the basis of the harmonic feature of the voice component to remove at least in part the echo component such as to derive an echo reduced signal. The echo reduced signal is then released. In specific implementations, the harmonic feature of the voice component is an estimate of the pitch associated to the voice component.
L'invention concerne un procédé et un appareil pour réduire l'écho dans un système de communication. Un premier signal comprenant un composant vocal associé à un haut-parleur est reçu. Le premier signal est traité pour dériver une caractéristique harmonique du composant vocal. Un second signal comprenant un composant d'écho mis en corrélation avec le premier signal est également reçu. Le second signal est traité au moins en partie sur la base de la caractéristique harmonique du composant vocal, de manière à éliminer au moins en partie le composant de l'écho, telle que la dérive d'un signal à écho réduit. Le signal à écho réduit est ensuite libéré. Dans des mises en oeuvre spécifiques, la caractéristique harmonique du composant vocal est une estimation de la hauteur tonale associée au composant vocal.
Awad Thomas Jefferson
Gervais Pascal Marcel
Laurence Martin
Octasic Inc.
Smart & Biggar
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