| Patents for H04M 9 - Arrangements for interconnection not involving centralised switching (8,105) |
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| 07/13/2004 | US6763109 Copper based interface system and regulated power source |
| 07/08/2004 | US20040131201 Multiple wireless microphone speakerphone system and method |
| 07/08/2004 | US20040131197 Method for adaptive control of multichannel acoustic echo cancellation system and device therefor |
| 07/08/2004 | US20040131178 Telephone apparatus and a communication method using such apparatus |
| 07/08/2004 | DE10043064B4 Verfahren und Vorrichtung zur Elimination von Lautsprecherinterferenzen aus Mikrofonsignalen Method and apparatus for eliminating interference from speaker microphone signals |
| 07/08/2004 | CA2451285A1 Multiple wireless microphone speakerphone system and method |
| 07/07/2004 | CN1511430A Howling control device and howling control method |
| 07/07/2004 | CN1157000C Method for adaptively setting step length of echo cancellor |
| 07/06/2004 | US6760436 Echo canceling apparatus determining dynamically changing echo component |
| 07/01/2004 | WO2004055996A2 Fault characterization using information indicative of echo |
| 07/01/2004 | US20040127264 Cell phone charger with incoming call indicator |
| 07/01/2004 | US20040125963 Adaptive equalizer for variable length sound tubes utilizing an acoustic pressure response measurement |
| 07/01/2004 | US20040125944 Method of capturing constant echo path information in a full duplex speakerphone using default coefficients |
| 07/01/2004 | US20040125943 Route delay sensitive echo cancellation |
| 07/01/2004 | US20040125942 Method of acoustic echo cancellation in full-duplex hands free audio conferencing with spatial directivity |
| 07/01/2004 | DE10217354B4 Türstation einer Hauskommunikationsanlage Door station of a House communication system |
| 06/30/2004 | EP1434416A2 Packet voice system with far-end echo cancellation |
| 06/29/2004 | US6757385 Symmetry based subband acoustic echo cancellation |
| 06/29/2004 | US6757384 Robust double-talk detection and recovery in a system for echo cancelation |
| 06/24/2004 | WO2004054127A1 Echo cancellation device with mobile crosstalk control |
| 06/24/2004 | US20040120511 Method of capturing constant echo path information in a full duplex speakerphone |
| 06/24/2004 | US20040120510 Selectively adaptable far-end echo cancellation in a packet voice system |
| 06/24/2004 | US20040120509 Method and apparatus for spectral containment over telephone service lines |
| 06/24/2004 | US20040120308 System and method for operating a packet voice far-end echo cancellation system |
| 06/24/2004 | US20040120271 Packet voice system with far-end echo cancellation |
| 06/24/2004 | DE10253307A1 Data bus addressing method, especially for use with a house or building intercom system, has an addressing method with a two part address system comprises of a unit specific address and a sender index |
| 06/23/2004 | EP1432222A1 Echo canceller for compressed speech |
| 06/23/2004 | EP1432221A1 Low-delay echo cancellation |
| 06/23/2004 | EP0691059B1 Secure access telephone extension system and method |
| 06/23/2004 | CN1507738A Video doorphone |
| 06/23/2004 | CN1507702A Method and apparatus for acoustic ECHO cancellation in a communication system providing TTY/TDD service |
| 06/22/2004 | US6754337 Telephone having four VAD circuits |
| 06/17/2004 | US20040114752 Fault characterization using information indicative of echo |
| 06/17/2004 | US20040114729 Fault characterization using information indicative of echo |
| 06/17/2004 | US20040114542 Transceiver with accelerated echo canceller convergence |
| 06/17/2004 | DE10254273A1 Verfahren zur Steuerung einer Türsprechanlage Method for controlling a door intercom |
| 06/16/2004 | EP1429470A2 Transceiver with accelerated echo canceller convergence |
| 06/16/2004 | EP1429315A1 Method and system for suppressing echoes and noises in environments under variable acoustic and highly fedback conditions |
| 06/16/2004 | CN1505894A Network echo suppression in mobile stations |
| 06/16/2004 | CN1505870A Method of arbitrating speakerphone operation in a portable communication device for eliminating false arbitration due to echo |
| 06/16/2004 | CN1505276A Method for estimating long delay time using coefficient of efficiency of circuit echo canceller |
| 06/15/2004 | US6751315 High bandwidth phone line transceiver with capacitor isolation |
| 06/15/2004 | US6751313 Method and apparatus for an improved echo canceller |
| 06/15/2004 | CA2368092C Telephone adapter and telephone system providing multiple telephone lines |
| 06/15/2004 | CA2160895C Multimedia communications network |
| 06/09/2004 | DE202004005153U1 Circuit arrangement for connecting call buttons to domestic communications system generates button connection AC voltage from DC voltage, converts button signals to electronically evaluable form |
| 06/08/2004 | US6748086 Cabin communication system without acoustic echo cancellation |
| 06/08/2004 | US6747581 Techniques for variable sample rate conversion |
| 06/08/2004 | US6745937 Low-power hand-held transaction device |
| 06/03/2004 | WO2004004297A3 Stationary spectral power dependent audio enhancement system |
| 06/03/2004 | DE10353239A1 Door intercom system has at least one modular door and/or home station with earth line of internal bus coupled to earth line of external 2-wire line |
| 06/02/2004 | EP1424846A2 Acoustic echo canceller |
| 06/01/2004 | US6744888 Line interface circuit with event detection signaling |
| 06/01/2004 | US6744887 Acoustic echo processing system |
| 06/01/2004 | US6744884 Speaker-phone system change and double-talk detection |
| 06/01/2004 | US6744876 Tone sending device of electronic private branch exchange |
| 06/01/2004 | CA2293911C Echo cancelling/suppression for handsets |
| 05/27/2004 | WO2004045244A1 Adaptative noise canceling microphone system |
| 05/27/2004 | WO2004045194A1 Silent ringing with reduced device sizes |
| 05/27/2004 | US20040101133 System for providing logic signals over communication lines |
| 05/27/2004 | DE10353224A1 Control circuit for lamp elements of door intercom system using parallel switch element for selective short-circuit of each lamp element |
| 05/27/2004 | DE10253308A1 Apartment block door communications installation commissioning procedure uses programming mode allowing allocation through use of same button push sequence at door and dwelling stations |
| 05/26/2004 | EP1422917A2 Interphone control method |
| 05/25/2004 | US6741874 Method and apparatus for reducing echo feedback in a communication system |
| 05/20/2004 | US20040096053 Notebook computer with hidden multimedia controller |
| 05/18/2004 | US6738480 Method and device for cancelling stereophonic echo with frequency domain filtering |
| 05/18/2004 | US6738474 System for providing pots splitters externally with respect to digital subscriber loop access multiplexers and remote terminal and central office equipment racks |
| 05/13/2004 | US20040091092 Vandal proof intercom system for apartment buildings |
| 05/12/2004 | CN1496092A Communication equipment with one-way loudspeaker telephone function and its control method |
| 05/06/2004 | WO2004039049A1 Echo-suppression with short delay |
| 05/06/2004 | WO2003020006A3 Circuit and method for acoustic source directional pattern determination utilizing two microphones |
| 05/06/2004 | US20040088742 Splitter and combiner for multiple data rate communication system |
| 05/06/2004 | US20040086108 Echo canceller employing dual-H architecture having variable adaptive gain settings |
| 05/06/2004 | US20040086106 Returning ringing signals through the tip amplifier of subscriber-line interface circuitry |
| 05/06/2004 | EP1415434A2 Emulation of phone extensions in a packet telephony distribution system |
| 05/04/2004 | US6731750 xDSL multiple-point interface device |
| 04/29/2004 | WO2004036889A1 Integrated noise cancellation and residual echo supression |
| 04/29/2004 | US20040082310 Method of controlling a switch device using a mobile terminal in a wireless communications network |
| 04/29/2004 | US20040080608 Method and apparatus for image capture, compression and transmission of a visual image over telephonic or radio transmission system |
| 04/28/2004 | EP1413127A1 Echo canceller having nonlinear echo suppressor for harmonics calculations |
| 04/28/2004 | EP1230784B1 Echo attenuating method and device |
| 04/28/2004 | CN1492646A Method for implementing audio frequency telephone and central change-over processor |
| 04/27/2004 | US6728372 Wire bound telecommunications device and a power supply circuit |
| 04/27/2004 | CA2323864C Digital button telephone system and extension terminal for the same |
| 04/22/2004 | US20040076288 Integrated noise cancellation and residual echo suppression |
| 04/22/2004 | US20040076226 Multiple data rate communication system |
| 04/22/2004 | DE20122102U1 Modular domestic communications system has at least some modular door and/or dwelling stations with main module similar to electrical installation device and functional module(s) |
| 04/20/2004 | US6724870 System and method for distributing enhanced telephony service to customer premises equipment |
| 04/20/2004 | US6724753 Control interface protocol for telephone sets for a satellite telephone system |
| 04/15/2004 | WO2002080126A9 Hospital bed and network system |
| 04/15/2004 | DE10215793B4 Hauskommunikationsanlage House communication system |
| 04/14/2004 | EP1408679A2 Multiple data rate communication system |
| 04/13/2004 | US6721411 Audio conference platform with dynamic speech detection threshold |
| 04/08/2004 | WO2004030333A1 Communication terminal with bandwidth expansion and echo compensation |
| 04/07/2004 | EP1406397A1 MULTI−CHANNEL ECHO CANCEL METHOD, MULTI−CHANNEL SOUND TRANSFER METHOD, STEREO ECHO CANCELLER, STEREO SOUND TRANSFER APPARATUS, AND TRANSFER FUNCTION CALCULATION APPARATUS |
| 04/06/2004 | US6718041 Echo attenuating method and device |
| 04/06/2004 | US6718036 Linear predictive coding based acoustic echo cancellation |
| 04/06/2004 | US6718035 Echo canceller employing dual-H architecture having split adaptive gain settings |
| 04/01/2004 | US20040064505 Method and device for setting up voice conferences |
| 04/01/2004 | US20040063421 Interface for microprocessors and network facilities |