EP 1464123 A1 20041006 - SYSTEMS AND METHODS FOR PROVIDING ECHO CONTROL
Title (en)
SYSTEMS AND METHODS FOR PROVIDING ECHO CONTROL
Title (de)
SYSTEME UND VERFAHREN ZUR BEREITSTELLUNG VON ECHOSTEUERUNG
Title (fr)
SYSTEMES ET PROCEDES DESTINES A FOURNIR UNE PROTECTION CONTRE LES ECHOS
Publication
Application
Priority
- US 0237825 W 20021125
- US 1687401 A 20011214
Abstract (en)
[origin: WO03052959A1] A system for providing echo control for voice calls transmitted over circuit switched and packet switched networks uses stand-alone echo cancellers. A first echo canceller 310 is coupled to a first switch 130 in the circuit switched network and a first gateway 150 on the packet switched network. The first gateway forwards a first voice call over the packet switched network170 to a second gateway 160 . The second gateway forwards the first voice call to a second switch 140 on the circuit switched network. A second echo canceller 320 is coupled to the second gateway and the second switch. The second echo canceller cancels echo associated with the first voice call when time associated with transmitting a first voice signal is greater than or equal to predetermined threshold.
IPC 1-7
IPC 8 full level
H04B 3/23 (2006.01)
CPC (source: EP)
H04B 3/23 (2013.01)
Citation (search report)
See references of WO 03052959A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
DOCDB simple family (publication)
WO 03052959 A1 20030626; AU 2002359480 A1 20030630; CA 2470097 A1 20030626; EP 1464123 A1 20041006
DOCDB simple family (application)
US 0237825 W 20021125; AU 2002359480 A 20021125; CA 2470097 A 20021125; EP 02794022 A 20021125