| Patents for H04M 9 - Arrangements for interconnection not involving centralised switching (8,105) |
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| 10/07/2004 | WO2004086814A1 Echo prevention circuit |
| 10/07/2004 | WO2004086555A2 Multi-band omni directional antenna |
| 10/07/2004 | US20040196823 Control interface protocol for telephone sets for a satellite telephone system |
| 10/06/2004 | CN1534973A News conference system capable of compensating microphone sensitiving and its method |
| 10/06/2004 | CN1170406C Method for detecting fixed user unit |
| 10/05/2004 | US6801605 Telephone network signal conversion system |
| 09/30/2004 | US20040192202 Method and apparatus for reducing echo feedback in a communication system |
| 09/29/2004 | EP1463280A2 High availability telephone set with backup line |
| 09/29/2004 | CN1533665A Echo canceller having nonlinear echo suppressor for harmonics calculations |
| 09/29/2004 | CN1533137A Access audio frequency output through capturing service |
| 09/29/2004 | CN1169312C Echo canceler for non-linear circuit |
| 09/28/2004 | US6799062 Full-duplex hands-free transparency circuit and method therefor |
| 09/28/2004 | US6799041 Method for setting up a connection between a mobile radio network and a destination call number in a private communication network |
| 09/28/2004 | US6798881 Noise reduction circuit for telephones |
| 09/28/2004 | US6798866 System and method for verifying central office wiring associated with line sharing |
| 09/28/2004 | US6798754 Acoustic echo cancellation equipped with howling suppressor and double-talk detector |
| 09/23/2004 | WO2004082249A1 Echo canceller with reduced requirement for processing power |
| 09/23/2004 | US20040186911 Access to audio output via capture service |
| 09/23/2004 | US20040186834 Apparatus and method for performing the management of operation history |
| 09/23/2004 | US20040184773 Digital video recorder having a Internet phone |
| 09/23/2004 | US20040183728 Multi-Band Omni Directional Antenna |
| 09/22/2004 | EP1460882A2 Access to audio output via capture service |
| 09/22/2004 | EP1459510A1 Echo canceller having spectral echo tail estimator |
| 09/22/2004 | CN1531353A Turbo code interswitch for G3 mobile communication standard protocol carried by programmable gate matrix |
| 09/22/2004 | CN1531297A Method and system for resource delayed distribution |
| 09/21/2004 | USRE38596 Methods for performing intelligent network services with an ISDN network terminator located at a subscriber's premise |
| 09/21/2004 | US6795551 Circuit for removing in-band FSK signals without muting of receiver |
| 09/21/2004 | US6795550 Echo canceller |
| 09/21/2004 | US6795548 Method and system for data communication |
| 09/21/2004 | US6795547 Full duplex speaker-phone providing increased loop stability |
| 09/15/2004 | CN1529528A Multi sampling rate array signal noise-removing method |
| 09/10/2004 | WO2004077806A1 Audibility enhancement |
| 09/10/2004 | WO2004077804A1 Speech communication system, server used for the same, and reception relay device |
| 09/10/2004 | WO2004077801A1 Device and method for detecting presence of service on telephone line |
| 09/09/2004 | US20040174991 Multi-channel echo cancel method, multi-channel sound transfer method, stereo echo canceller, stereo sound transfer apparatus and transfer function calculation apparatus |
| 09/09/2004 | US20040174988 Method and apparatus for active reduction of speakerphone singing |
| 09/09/2004 | US20040174987 Accumulator with variable limits |
| 09/09/2004 | US20040174973 Audio conference platform with dynamic speech detection threshold |
| 09/08/2004 | CN1166160C Arrangement for suppressing interfering component of input signal |
| 09/07/2004 | US6789145 Interface for microprocessors and network facilities |
| 09/02/2004 | US20040172474 Method and system for delayed allocation of resources |
| 09/02/2004 | US20040170283 Howling control device and howling control method |
| 09/02/2004 | US20040170271 Echo canceller ensuring further reduction in residual echo |
| 09/02/2004 | DE10253307B4 Adressierungsverfahren für Datenbus-Anlagen Addressing methods for data bus systems |
| 09/01/2004 | EP1453273A2 Method and system for delayed allocation of resources |
| 09/01/2004 | EP1453213A2 Communication apparatus with antenna |
| 08/31/2004 | US6785384 Two-step algorithm for training an echo cancellation filter |
| 08/31/2004 | US6785382 System and method for controlling a filter to enhance speakerphone performance |
| 08/28/2004 | CA2456372A1 Method and system for delayed allocation of resources |
| 08/26/2004 | US20040165718 Device and method for detecting presence of service on telephone line |
| 08/26/2004 | DE19924663B4 Verfahren und Anordnung zum Einblenden von Werbung in Bildtelefonate Method and apparatus for superimposing advertising in video calls |
| 08/26/2004 | DE10332556A1 Door voice/call-response unit for announcing presence of occupant to a visitor allows the visitor to leave a message or to talk to the occupant on the telephone |
| 08/24/2004 | US6782096 Subscriber line driver and termination |
| 08/19/2004 | US20040161102 Echo canceller employing dual-H architecture having split adaptive gain settings |
| 08/19/2004 | US20040161101 Echo canceller |
| 08/19/2004 | DE10332351A1 Speech communication system for use in drive by restaurants has a vehicle detector and a cordless communication with driver |
| 08/18/2004 | EP1446894A1 Echo canceller ensuring further reduction in residual echo |
| 08/18/2004 | CN1521730A Speaker verifying apparatus |
| 08/17/2004 | US6778671 Method of reference to echo time alignment for facilitation of echo cancellation |
| 08/17/2004 | US6778665 Distribution of current draw in a line powered DAA |
| 08/17/2004 | CA2345003C Method and system for distribution of wireless signals for increased wireless coverage using the power lines |
| 08/12/2004 | US20040156510 Speaker verifying apparatus |
| 08/11/2004 | EP1445760A1 Speaker verifying apparatus |
| 08/11/2004 | EP1444819A1 Method and system for classifying network connections |
| 08/11/2004 | EP1219102A4 Tagging echoes with low frequency noise |
| 08/05/2004 | WO2004066107A2 Method and apparatus for digital subscriber line access multiplexer stacking |
| 08/05/2004 | US20040151303 Apparatus and method for enhancing speech quality in digital communications |
| 08/05/2004 | US20040150570 Communication apparatus with antenna |
| 08/05/2004 | US20040149551 Silent ringing with reduced device sizes |
| 08/04/2004 | EP1443674A1 Echo cancellation with double-talk detection |
| 08/04/2004 | EP1190553A4 Noise reduction circuit for telephones |
| 08/04/2004 | EP1097561A4 Acoustic echo canceller |
| 08/03/2004 | US6771771 Method and device for echo cancellation |
| 08/03/2004 | US6771769 Method and apparatus for active reduction of speakerphone singing |
| 08/03/2004 | US6771701 Adaptive filter divergence control in echo cancelers by means of amplitude distribution evaluation with configurable hysteresis |
| 07/29/2004 | WO2004064366A1 Non-linear acoustic echo canceller |
| 07/29/2004 | WO2004064365A1 Device and method for suppressing echo, in particular in telephones |
| 07/29/2004 | DE10336348A1 Geschlossenes digitales Netz, konstruiert aus einem Ortsanschlussgerät und einer Telefonreihenanlage, und Signalübertragungsverfahren für das geschlossene digitale Netz Closed digital network constructed from a local access device and a telephone number system, and signal transmission method for the closed digital network |
| 07/28/2004 | CN1516484A Digital push-button telephone system |
| 07/28/2004 | CN1516483A Digital push-button telephone system |
| 07/28/2004 | CN1516482A Digital push-button telephone set |
| 07/28/2004 | CN1159948C Device and method for processing speech |
| 07/28/2004 | CA2456363A1 Key telephone set having interchangeable units |
| 07/27/2004 | US6768723 Method of operating a full duplex speakerphone echo canceller |
| 07/22/2004 | US20040141609 Method and apparatus for digital subscriber line access multiplexer stacking |
| 07/22/2004 | US20040141608 Echo canceller |
| 07/22/2004 | US20040141603 Vehicle Intercom system |
| 07/22/2004 | DE10359198A1 System und Verfahren mit Lauthörtelefon System and method with speakerphone |
| 07/21/2004 | EP1439669A2 Vehicle intercom system |
| 07/21/2004 | EP1438833A2 Device and method for multichannel acoustic echo cancellation with a variable number of channels |
| 07/20/2004 | US6766022 System for providing universal cross-connect connectivity in a central office |
| 07/20/2004 | US6766019 Method and apparatus for performing double-talk detection in acoustic echo cancellation |
| 07/20/2004 | US6765971 System method and computer program product for improved narrow band signal detection for echo cancellation |
| 07/20/2004 | CA2244312C Call pick-up, hold distinctive ringing service |
| 07/15/2004 | WO2004059962A1 Echo suppression for compressed speech, comprising only partial transcoding of the uplink user data stream |
| 07/15/2004 | WO2004015961A3 Estimating bulk delay in a telephone system |
| 07/15/2004 | US20040136447 Echo cancellation for a packet voice system |
| 07/15/2004 | CA2511050A1 Echo suppression for compressed speech, with only partial transcoding of the uplink user data stream |
| 07/14/2004 | CN1512815A Residential community household automatic system and central server for it |
| 07/14/2004 | CN1157995C Echo eliminating device and method thereof |