Echo suppression for compressed speech, with only partial...

Details Echo suppression for compressed speech, with only partial... Echo suppression for compressed speech, with only partial...

H - Electricity

04

M

H04M 9/08 (2006.01)

Patent

CA 2511050

Disclosed is a method for suppressing (10) echo (z(t)) in uplink data (y(t), 12-16) originating from a terminal (2, 3), said method allowing a delay and a decrease in quality during echo suppression of uplink data originating from a wireless terminal (2, 3). According to the inventive method, original or copied downlink data (12-16) and uplink data (19-21) are analyzed in order to prepare echo suppression (10), and uplink data (19-21) is modified in the compressed state in order to reduce echo (10) by using the results of said analysis (9) of the downlink data (12-16) and uplink data (19-21).

L'invention concerne un procédé visant à supprimer (10) l'écho (z(t)) dans des données sortantes (y(t), 12-16) provenant d'un terminal radiotéléphonique mobile (2, 3), ce procédé permettant d'éviter un retard de temps et une baisse de qualité lors de la suppression de l'écho dans lesdites données. Ce procédé consiste à analyser des données entrantes (12-16) et des données sortantes (19-21) sous forme originale ou sous forme de copie pour préparer la suppression de l'écho (10), puis, à l'aide des résultats de l'analyse (9) des données entrantes (12-16) et des données sortantes (19-21), à modifier les données sortantes (19-21) à l'état comprimé de façon à réduire (10) l'écho.

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