Brevet : EP2186312 - ANNULATION D'ÉCHO ACOUSTIQUE SUR LA BASE D'UN ENVIRONNEMENT BRUYANT

Titre

ANNULATION D'ÉCHO ACOUSTIQUE SUR LA BASE D'UN ENVIRONNEMENT BRUYANT

N° et date de publication de la demande

EP2186312 - 19/05/2010

Type de la demande

A1

N° et date de dépôt

EP08798672.5 - 26/08/2008

N° et date de priorité

US84837607 - 31/08/2007

Famille de brevets

CN101785290A ; KR20100057019A ; MX2010002172A ; WO2009029605A1 ; BRPI0816218A2 ; EP2186312A1 ; ATE543329T1 ; RU2010112419A ; US2009059821A1

Abrégé

A method (200) of cancelling echo in a duplex communication device (100). The method can include detecting a level of noise present on an uplink signal path (104), generating a noise classifier (194) based on the detected level of noise, detecting whether uplink audio is present on the uplink signal path (104) and detecting whether downlink audio is present on a downlink signal path (102). The method further can include generating a double talk flag (136) based at least on the noise classifier, whether uplink audio is present on the uplink signal path, and whether downlink audio is present on the downlink signal path. In addition, the double talk flag, the noise classifier and an uplink signal can be processed to generate an output signal (120) having reduced echo.