EP 1232644 A1 20020821 - A SYSTEM AND METHOD FOR ECHO CANCELLATION
Title (en)
A SYSTEM AND METHOD FOR ECHO CANCELLATION
Title (de)
VORRICHTUNG UND VERFAHREN ZUR ECHOENTZERRUNG
Title (fr)
SYSTEME ET PROCEDE D'ANNULATION D'ECHO
Publication
Application
Priority
- CA 2289275 A 19991110
- US 0030898 W 20001109
Abstract (en)
[origin: WO0135624A1] A line card (22) for coupling a subscriber line (18) to a switching network (17) the line card (22) comprising an echo canceling circuit (42) for reducing an echo signal received from the network and perceived at a user instrument coupled to the subscriber line. The network cancellation circuit utilizes a network model (44) to predict an echo replica signal which is then subtracted either from the transmit (47) or receive (49) signals to the network. The line card (22) may include a far end echo cancellation circuit, a near end echo cancellation circuit or a combination of both.
IPC 1-7
IPC 8 full level
H04B 3/23 (2006.01)
CPC (source: EP)
H04B 3/23 (2013.01)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0135624 A1 20010517; AU 1481501 A 20010606; CA 2289275 A1 20010510; EP 1232644 A1 20020821; EP 1232644 A4 20040915
DOCDB simple family (application)
US 0030898 W 20001109; AU 1481501 A 20001109; CA 2289275 A 19991110; EP 00977136 A 20001109