| Patents for H04M 9 - Arrangements for interconnection not involving centralised switching (8,105) |
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| 04/01/2004 | US20040062403 Solution space principle component-based adaptive filter and method of operation thereof |
| 04/01/2004 | DE20217878U1 Ansteuerschaltung für elektrische Funktionselemente in Zweidraht-Hauskommunikationsgeräten A drive circuit for electrical functional elements in two-wire-house communications equipment |
| 04/01/2004 | DE20217877U1 Hauskommunikationssystem mit Zweidraht-Teilnehmeranschluss House communication system with two-wire local loop |
| 04/01/2004 | DE19729521B4 Verfahren und Vorrichtung zur Störgeräusch- und Echounterdrückung Method and device for echo cancellation and Störgeräusch- |
| 03/31/2004 | EP1404148A1 Howling control device and howling control method |
| 03/31/2004 | EP1404147A2 System for inputting speech, radio receiver and communication system |
| 03/31/2004 | CN1486566A Residual echo estimation for echo cancellation |
| 03/25/2004 | WO2004025937A1 Full duplex telephone set using echo cancellation and side tone management for high gain stability |
| 03/25/2004 | US20040059571 System for inputting speech, radio receiver and communication system |
| 03/25/2004 | US20040057575 LDPC code and encoder/decoder regarding same |
| 03/25/2004 | US20040057574 Suppression of echo signals and the like |
| 03/25/2004 | US20040057567 Entrance intercom system |
| 03/24/2004 | EP1401183A1 Method and device for echo cancellation |
| 03/24/2004 | EP1400097A1 Method for adaptive control of multichannel acoustic echo cancellation system and device therefor |
| 03/24/2004 | EP0898816B1 Echo suppressor and non-linear processor of echo canceller |
| 03/24/2004 | EP0698328B1 Multimedia communications network |
| 03/23/2004 | US6711260 Method and apparatus for spectral containment over telephone service lines |
| 03/23/2004 | US6711259 Method and apparatus for noise suppression and side-tone generation |
| 03/18/2004 | US20040052358 Full duplex telephone set using echo cancellation and side tone management for high gain stability |
| 03/18/2004 | DE19716599C5 Türsprechanlage mit mehreren Bustelefonen, einer Türstation und einem Netzgerät zur Stromversorgung derselben Door entry system with several bus telephones, door station and a power supply unit for supplying the same |
| 03/17/2004 | EP1398946A1 Communication terminal apparatus with bandwidth enlargement and echo canceler |
| 03/17/2004 | EP0917796B1 Dynamic optimization of handsfree microphone gain |
| 03/16/2004 | US6707912 Method and apparatus for setting a step size for an adaptive filter coefficient of an echo canceller |
| 03/16/2004 | US6707910 Detection of the speech activity of a source |
| 03/11/2004 | WO2004021167A1 Audio board |
| 03/11/2004 | US20040048637 Phone enabled direct response |
| 03/11/2004 | US20040047464 Adaptive noise cancelling microphone system |
| 03/11/2004 | US20040047463 Robust symbol timing recovery circuit for telephone line modem |
| 03/11/2004 | DE20319075U1 Überwachungseinrichtung für Gebäudeeingänge Monitoring means for building entrances |
| 03/09/2004 | US6704415 Echo canceler |
| 03/04/2004 | US20040042616 Echo canceling system and echo canceling method |
| 03/04/2004 | US20040042510 Indirect DSL over loaded and unloaded loops |
| 03/04/2004 | US20040042387 Communication system with multicarrier telephony transport |
| 03/04/2004 | DE10216778B4 Verfahren zum Programmieren einer Türsprechanlage Method for programming a door intercom |
| 03/04/2004 | DE10029943B4 Klingel- und/oder Türsprechanlage Bell and / or door intercom |
| 03/03/2004 | EP1393461A1 Echo canceller and a method of cancelling echo |
| 03/03/2004 | EP1243119A4 Band-by-band full duplex communication |
| 03/03/2004 | EP1060610A4 Echo canceller employing dual-h architecture having split adaptive gain settings |
| 03/03/2004 | EP1060609A4 Echo canceller employing dual-h architecture having improved double-talk detection |
| 03/03/2004 | EP1060608A4 Echo canceller employing dual-h architecture having improved coefficient transfer |
| 03/03/2004 | EP0847645A4 Voice activity detector for half-duplex audio communication system |
| 03/02/2004 | US6700979 Echo canceller |
| 03/02/2004 | US6700977 Method and apparatus for cancelling multi-channel echo |
| 03/02/2004 | US6700976 Noise canceler system with adaptive cross-talk filters |
| 02/26/2004 | US20040037416 Communication apparatus having one-way speakerphone function and a method of controlling the same |
| 02/25/2004 | EP1392040A2 Communication apparatus with one-way speakerphone function |
| 02/25/2004 | EP1391106A1 Audio conference platform with dynamic speech detection threshold |
| 02/25/2004 | EP1391101A1 Telephone apparatus and a communication method using such apparatus |
| 02/25/2004 | EP1391055A2 Line interface with a matching impedance coupled to a feedback path |
| 02/24/2004 | US6697358 Emulation of phone extensions in a packet telephony distribution system |
| 02/19/2004 | WO2004015961A2 Estimating bulk delay in a telephone system |
| 02/19/2004 | US20040032947 Element management system for managing line-powered network elements |
| 02/19/2004 | DE10215790B4 Hauskommunikationsanlage House communication system |
| 02/18/2004 | CN1476180A Sound echo inhibitor for hand free voice communication |
| 02/18/2004 | CN1139241C Echo canceler and its method |
| 02/17/2004 | US6694020 Frequency domain stereophonic acoustic echo canceller utilizing non-linear transformations |
| 02/17/2004 | US6694018 Echo canceling apparatus and method, and voice reproducing apparatus |
| 02/12/2004 | WO2004014055A1 Echo canceling in a speech processing system |
| 02/12/2004 | WO2002060156A3 Narrow band shadow encoder |
| 02/12/2004 | US20040028217 Estimating bulk delay in a telephone system |
| 02/05/2004 | WO2004012426A1 System and method for speakerphone operation in a communications device |
| 02/05/2004 | US20040022394 Room acoustics echo meter for voice terminals |
| 02/05/2004 | DE19548744C5 Signal- und Gegensprechanlage für die Haustechnik Signal and intercom for building equipment |
| 02/05/2004 | DE10233020A1 A house or office communication system from an entrance to a section has high frequency radio connections for door opening and voice contact |
| 02/04/2004 | CN1137585C Dial number based calling line preselector and preselecting method |
| 02/03/2004 | US6687361 Electronic exchange and key telephone system |
| 01/29/2004 | US20040018860 Acoustic echo suppressor for hands-free speech communication |
| 01/28/2004 | EP1385324A1 A system and method for reducing the effect of background noise |
| 01/28/2004 | CN1136716C Method of and apparatus for echo reduction in a hand-free cellular radio communication system |
| 01/27/2004 | US6683961 Process and apparatus for eliminating loudspeaker interference from microphone signals |
| 01/22/2004 | WO2004008731A1 Echo canceller with model mismatch compensation |
| 01/21/2004 | CN1135729C Multi-input wireless phone with echo suppression |
| 01/15/2004 | WO2002065662A9 Line interface a matching impedance coupled ro a feedback path |
| 01/08/2004 | WO2004004298A1 Echo processing devices for single-channel or multichannel communication systems |
| 01/08/2004 | WO2004004297A2 Stationary spectral power dependent audio enhancement system |
| 01/08/2004 | US20040005049 Apparatus and method for providing switching at a telephone cross-connect |
| 01/08/2004 | US20040004536 Door station apparatus with electric lock |
| 01/08/2004 | DE10323895A1 Gegensprechvorrichtung Intercom device |
| 01/07/2004 | EP1379067A1 Door station apparatus with electric lock |
| 01/07/2004 | CN1466359A Method for realizing echo counteraction |
| 01/07/2004 | CN1466358A Method for realizing echo counteraction |
| 01/06/2004 | US6674865 Automatic volume control for communication system |
| 01/02/2004 | EP1374547A2 Network echo suppression in mobile stations |
| 01/02/2004 | EP1374194A2 Hospital bed and network system |
| 01/01/2004 | US20040001597 Audio communication system and method with improved acoustic characteristics |
| 12/31/2003 | WO2004002127A1 Non stationary echo canceller |
| 12/30/2003 | US6671360 Intercom system for a building or apartment house |
| 12/24/2003 | WO2003039115A3 Device and method for carrying out multichannel acoustic echo cancellation with a variable number of channels |
| 12/24/2003 | CN1463507A Echo processing appts. |
| 12/18/2003 | WO2003065693A3 Analog voice activity detector for telephone |
| 12/16/2003 | US6665401 Method for canceling echo |
| 12/16/2003 | CA2257876C Multiple application switching platform and method |
| 12/11/2003 | WO2002065662A3 Line interface a matching impedance coupled ro a feedback path |
| 12/11/2003 | US20030228013 Methods and devices for reducing sidetone noise levels |
| 12/10/2003 | CN1130827C Convergece detector and method of adaptive filter |
| 12/09/2003 | US6662367 Poly-phase filters in multicarrier communication systems |
| 12/09/2003 | US6662027 Method of arbitrating speakerphone operation in a portable communication device for eliminating false arbitration due to echo |
| 12/09/2003 | US6661895 Zero-delay structure for sub-band echo cancellation |
| 12/09/2003 | US6661883 Method and apparatus allowing remote key system units to interoperate |
| 12/09/2003 | CA2123002C Network echo canceller |