| Patents for H04M 9 - Arrangements for interconnection not involving centralised switching (8,105) |
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| 06/12/2001 | CA2146578C Hands-free speaking device with echo canceler |
| 06/07/2001 | DE19958125A1 Door control system can link several communications sources, allows private selection of response |
| 06/07/2001 | DE19957686A1 Door control shared phone system starts one way link to dwelling to distinguish from public network call allows privacy |
| 06/06/2001 | CA2327209A1 Method and device for echo cancelling |
| 06/05/2001 | US6243571 Method and system for distribution of wireless signals for increased wireless coverage using power lines |
| 05/31/2001 | WO2000077492A3 Method and apparatus allowing remote key system units to interoperate |
| 05/30/2001 | EP1103139A1 Methods and apparatus for mitigating the effects of microphone overload in echo cancelation systems |
| 05/30/2001 | EP1103138A1 Device for digital processing with frequency filtering and reduced computation complexity |
| 05/29/2001 | US6240180 Echo canceller employing dual-H architecture having split adaptive gain settings |
| 05/23/2001 | EP1101357A1 Method and device for incorporating advertising into videotelephone communications |
| 05/23/2001 | DE19954844A1 Door entry control system allows voice or screen input of flat required useful for blind people |
| 05/23/2001 | CN1296706A Method for setting up connection between mobile radio network and destination cell number in private communication network |
| 05/22/2001 | US6236725 Echo canceler employing multiple step gains |
| 05/17/2001 | WO2001035603A2 Echo canceller |
| 05/17/2001 | CA2390059A1 Absystem and method for echo cancellation |
| 05/16/2001 | EP1099332A1 Outgoing telephone line preselection based on dialed number |
| 05/15/2001 | US6233462 Portable terminal device for automatically controlling transmitting voice level and calling sound level |
| 05/15/2001 | CA2231892C Key telephone system |
| 05/09/2001 | EP1097562A1 Digital adaptive filter and acoustic echo canceller using the same |
| 05/09/2001 | EP1097561A1 Acoustic echo canceller |
| 05/09/2001 | EP0752181B1 Frequency-domain adaptive-filter acoustic echo canceller |
| 05/09/2001 | CN1294814A Methods and appts. for controlling echo suppression in communications systems |
| 05/09/2001 | CN1294361A Simultaneous interpreting method and device for telecommunication language |
| 05/03/2001 | DE19925046A1 Verfahren und Vorrichtung zur Unterdrückung von Rauschen und Echos Method and apparatus for suppressing noise and echoes |
| 05/02/2001 | EP1096763A2 Automatic phone line re-allocation |
| 05/01/2001 | US6226380 Method of distinguishing between echo path change and double talk conditions in an echo canceller |
| 05/01/2001 | CA2208942C Sub-band echo canceller using optimum wavelet packets and cross-band cancellation |
| 04/25/2001 | CN1292617A Echo cancelltion method and device |
| 04/18/2001 | EP1093284A2 Method and apparatus for cancelling echo |
| 04/12/2001 | WO2001026352A1 Tagging echoes with low frequency noise |
| 04/12/2001 | WO2001026339A1 Band pass and notch filters for echo reduction with less phase distortion |
| 04/10/2001 | US6215880 Two-wire conference apparatus with echo canceler without training |
| 04/03/2001 | US6212275 Telephone with automatic pause responsive, noise reduction muting and method |
| 04/03/2001 | US6212273 Full-duplex speakerphone circuit including a control interface |
| 04/03/2001 | US6212204 Subscriber line multiplexer |
| 03/29/2001 | WO2001022601A2 Echo cancelling process with improved phase control |
| 03/29/2001 | WO2000074350A3 Adaptability to multiple hands-free communication accessories |
| 03/28/2001 | EP1086571A1 A method and system for scaleable near-end speech cancellation for tip and ring tone signal detectors |
| 03/28/2001 | CN1289508A Generating calibration signals for an adaptive beamformer |
| 03/27/2001 | CA2174366C Subband echo cancellation method using projection algorithm |
| 03/21/2001 | CN1288323A Main exchange free type radio exchange system |
| 03/15/2001 | WO2001019062A1 Suppression of residual acoustic echo |
| 03/15/2001 | WO2000065817A3 Hands-free device and method of operating the same |
| 03/13/2001 | US6201866 Echo canceler employing segment-based reinitialization |
| 03/08/2001 | WO2000072556A9 System and method for near-end talker detection by spectrum analysis |
| 03/08/2001 | DE10020257A1 Telephone installation combined with door intercom system |
| 03/07/2001 | CN1286863A Method and apparatus for improved echo suppression in communications systems |
| 03/07/2001 | CN1286862A Method and apparatus for providing comfort noise in communications system |
| 03/06/2001 | US6199036 Tone detection using pitch period |
| 03/06/2001 | US6198819 Echo canceller having improved non-linear processor |
| 02/27/2001 | US6195437 Method and apparatus for independent gain control of a microphone and speaker for a speakerphone mode and a non-speakerphone audio mode of a computer system |
| 02/27/2001 | CA2225687C A plug and play telephone |
| 02/22/2001 | WO2001013615A2 Method and device for transmitting voice signals in a building |
| 02/22/2001 | WO2000056036A3 Echo suppression device and method for performing the same |
| 02/22/2001 | DE19938534A1 Verfahren und Vorrichtung zur Übertragung von Sprachsignalen in einem Gebäude Method and device for transmitting speech signals in a building |
| 02/21/2001 | EP1077584A2 Method and device for compensating signal losses |
| 02/20/2001 | US6192126 Double talk detector, method for double talk detection and device incorporating such a detector |
| 02/13/2001 | US6188755 Key telephone system having a plurality of telephone numbers to key telephone set |
| 02/13/2001 | CA2237825C Adaptive filter and adapting method thereof |
| 02/08/2001 | WO2001010102A2 Acoustical echo cancellation device |
| 02/08/2001 | DE19935808A1 Echounterdrückungseinrichtung zum Unterdrücken von Echos in einer Sender/Empfänger-Einheit The echo suppression device for suppressing echoes in a transmitter / receiver unit |
| 02/06/2001 | US6185300 Echo canceler for use in communications system |
| 02/06/2001 | US6185299 Adaptive echo cancellation device in a voice communication system |
| 02/06/2001 | US6185298 Telephone having a speech ban limiting function |
| 02/06/2001 | US6185294 Method and apparatus for installing telephone intercom-voice messaging apparatus at doorbell for dwelling |
| 01/31/2001 | EP1073248A1 Multiline telecommunications terminal with display to show caller information and call state |
| 01/30/2001 | US6181793 Echo canceller employing dual-H architecture having improved coefficient transfer |
| 01/30/2001 | US6181753 Echo/noise canceler with delay compensation |
| 01/30/2001 | US6181707 Intercom system having unified control and audio data transport |
| 01/30/2001 | CA2232349C Method of and apparatus for off-hook signalling between telephones or adjuncts on the same loop |
| 01/25/2001 | WO2001006745A1 A system for communicating messages, including audio data, over a network of computers in real time |
| 01/24/2001 | EP1071225A1 Double-talk detection device, echo canceller using double-talk detection device and echo suppressor using double-talk detection device |
| 01/24/2001 | EP1070417A1 Echo cancellation |
| 01/24/2001 | EP1070416A1 Teleconferencing system |
| 01/23/2001 | US6178162 Method and apparatus for inhibiting echo in a channel of a communication system |
| 01/17/2001 | EP1069752A2 Method and circuit for echo cancellation in a telecommunication system with non linear transmission paths |
| 01/17/2001 | EP1068744A2 Method for setting up a connection between a mobile radio network and a destination call number in a private communication network |
| 01/16/2001 | US6175634 Adaptive noise reduction technique for multi-point communication system |
| 01/16/2001 | US6175617 Key telephone apparatus with [automatic] call distribution function |
| 01/11/2001 | WO2001003413A2 Interphone apparatus with connection to a cellular telephone |
| 01/11/2001 | WO2001003317A1 Coded domain adaptive level control of compressed speech |
| 01/11/2001 | WO2001003316A1 Coded domain echo control |
| 01/11/2001 | WO2001002929A2 Coded domain noise control |
| 01/11/2001 | DE19938158C1 Acoustic signal loss compensation method for automobile intercom device determines signal transmission path for providing transmission function parameter used for controlling acoustic signal level |
| 01/11/2001 | CA2378062A1 Coded domain adaptive level control of compressed speech |
| 01/11/2001 | CA2378035A1 Coded domain noise control |
| 01/11/2001 | CA2378012A1 Coded domain echo control |
| 01/09/2001 | US6173058 Sound processing unit |
| 01/09/2001 | CA2077849C Circuit arrangement for controlling the volume range of a voice terminal |
| 01/04/2001 | WO2001001665A2 Host-based speaker phone |
| 01/04/2001 | DE19910198A1 Product sales information presentation device uses telephone network for linking customer to computer using speech recognition program for interactive information exchange |
| 01/03/2001 | CN1278699A Method for compensating echo in telecommunication system and circuit arrangement |
| 01/01/2001 | CA2396245A1 Method and apparatus for canceling echo |
| 01/01/2001 | CA2396244A1 Method and apparatus for canceling echo |
| 12/28/2000 | DE19928045A1 Echo compensation of telecommunications system with non-linear transmission paths involves mounting suppression device in transcoder, emulating echo path non-linear component |
| 12/27/2000 | EP1062794A2 Communication system |
| 12/26/2000 | CA2225715C A plug and play telephone |
| 12/21/2000 | WO2000077492A2 Method and apparatus allowing remote key system units to interoperate |
| 12/20/2000 | EP1060610A1 Echo canceller employing dual-h architecture having split adaptive gain settings |
| 12/20/2000 | EP1060609A1 Echo canceller employing dual-h architecture having improved double-talk detection |