EP 1590894 A1 20051102 - ECHO CANCELLATION DEVICE INCLUDING A DOUBLE TALK DETECTOR
Title (en)
ECHO CANCELLATION DEVICE INCLUDING A DOUBLE TALK DETECTOR
Title (de)
VORRICHTUNG ZUR ECHOUNTERDRÜCKUNG MIT GEGENSPRECHDETEKTOR
Title (fr)
DISPOSITIF D'ANNULATION D'ECHO COMPRENANT UN DOUBLE DETECTEUR DE PAROLES
Publication
Application
Priority
IB 0300667 W 20030203
Abstract (en)
[origin: WO2004070969A1] This echo cnacellation device, for cancelling an echo signal (S(n)) output by telecommunication means (10), comprises adaptive filtering means (11), for outputting an estiamte (S'(n)) of the echo signal (S(n)). It further comprises further adaptive filtering means (34), receiving as an input a signal (Y(n)) which comprises the sum of a signal (V(n)) originating from a first end of a connection and of the echo signal (S(n)). The adaptive filtering means (11) and the further adaptive filtering means (34) are controlled by a first error signal (E'(n)), and the first error signal (E'(n)) becomes null if, either the signal (V(n)) originating from the first end of the connection, or the echo signal (S(n)), is suppressed by the further adaptive filtering means (34) and if the estimate (S'(n)) of the echo signal (S(n)) is equal to the echo signal (S(n)).
IPC 1-7
IPC 8 full level
H04B 3/23 (2006.01)
CPC (source: EP)
H04B 3/234 (2013.01)
Citation (search report)
See references of WO 2004070969A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR
DOCDB simple family (publication)
WO 2004070969 A1 20040819; AU 2003206046 A1 20040830; EP 1590894 A1 20051102
DOCDB simple family (application)
IB 0300667 W 20030203; AU 2003206046 A 20030203; EP 03702929 A 20030203