Patents
Sitemap › H04 - Electric communication technique › H04M - Telephonic communication › H04M 9 - Arrangements for interconnection not involving centralised switching
Patents for H04M 9 - Arrangements for interconnection not involving centralised switching (8,105)
07/2003
07/15/2003US6594322 Method of distributed loop control for a multicarrier telephony transport
07/08/2003US6590975 Echo canceller
07/08/2003US6590974 Howling controller
07/03/2003US20030123674 Gain control method for acoustic echo cancellation and suppression
07/03/2003DE20302094U1 Mobile telephone with power supply output for supplying current to another device such as a personal stereo, CD player or digital camera
07/02/2003EP1324583A2 Gain control method for acoustic echo cancellation
07/02/2003EP1046273B1 Methods and apparatus for providing comfort noise in communications systems
07/01/2003US6587555 Virtual PBX
07/01/2003US6587138 Method and device for incorporating advertising into videotelephone communications
06/2003
06/26/2003WO2003053033A1 Echo canceller having spectral echo tail estimator
06/26/2003US20030118178 Method and apparatus for protecting an echo canceller against random transitions from linear to non-linear echo paths
06/26/2003US20030118165 Highway expansion apparatus for key telephone system and operation method thereof
06/26/2003US20030118091 System and method for reducing power dissipation for DSL circuits
06/26/2003DE20305324U1 Door bell installation with door call station fitted with bell pushbutton(s) and/or extra functional units
06/19/2003US20030112966 Method and system for implementing a reduced complexity dual rate echo canceller
06/18/2003EP1320244A1 Modular Door Intercom System
06/17/2003US6580795 Echo canceller for a full-duplex communication system and method therefor
06/17/2003US6580794 Acoustic echo canceler with a peak impulse response detector
06/12/2003US20030108020 Method and arrangement for signalling in a wireless IP multimedia network and a wireless IP multimedia network terminal device
06/11/2003EP1317845A2 Residual echo estimation for echo cancellation
06/10/2003US6577731 Method and apparatus of cancelling multi-channel echoes
06/05/2003WO2002054719A3 Method and apparatus for active reduction of speakerphone echo
06/05/2003US20030105540 Echo attenuating method and device
06/05/2003US20030104846 Computer appliance comprising a multiway acoustic output and input system
06/05/2003US20030103623 Apparatus for reducing echoes and noises in telephone
06/03/2003US6574337 Adaptive echo canceler undoing adaptations made during double-talk
06/03/2003US6574336 Echo suppressor and non-linear processor of echo canceller
06/03/2003CA2263540C Dynamic optimization of handsfree microphone gain
06/03/2003CA2249283C Acoustic feedback correction
05/2003
05/30/2003WO2003044978A1 Echo canceller ensuring further reduction in residual echo
05/29/2003US20030099349 Echo canceller in a communication system at a terminal
05/27/2003US6570986 Double-talk detector
05/27/2003US6570985 Echo canceler adaptive filter optimization
05/22/2003WO2003043298A1 Method and system for classifying network connections
05/22/2003WO2003043293A1 System and method for reducing power dissipation for dsl circuits
05/22/2003US20030095569 Distributed integration of legacy PBX system with SIP networks
05/20/2003CA2291428C Improved method of operating a full duplex speakerphone echo canceller
05/15/2003US20030091180 Adaptive signal gain controller, system, and method
05/14/2003EP1311104A2 Method and arrangement for signalling in a wireless IP multimedia system
05/14/2003EP1311103A2 Method for integration of PBX systems with SIP networks
05/14/2003EP0965176A4 Full duplex communication circuit with a transducer for simultaneously generating audio output and receiving audio input
05/14/2003CN1418340A Computer comprising maltiway acoustic output and input system
05/13/2003US6563925 Method and apparatus for space-time echo cancellation
05/13/2003US6563803 Acoustic echo canceller
05/08/2003WO2003039115A2 Device and method for carrying out multichannel acoustic echo cancellation with a variable number of channels
05/07/2003CN1416639A Improved system and method for implementation of echo canceller
05/06/2003US6560332 Methods and apparatus for improving echo suppression in bi-directional communications systems
05/01/2003US20030081762 Method and apparatus for an improved echo canceller
04/2003
04/29/2003US6556682 Method for cancelling multi-channel acoustic echo and multi-channel acoustic echo canceller
04/29/2003US6556564 Scheduled internet protocol telephone instrument system
04/24/2003US20030076950 Method and system for filtering a signal and for providing echo cancellation
04/24/2003US20030076949 Echo canceller employing dual-H architecture having improved non-linear echo path detection
04/24/2003US20030076948 Echo canceler compensating for amplifier saturation and echo amplification
04/24/2003US20030076947 Echo processor generating pseudo background noise with high naturalness
04/24/2003US20030076844 Method and system for filtering a signal and providing echo cancellation using an adaptive length filter
04/23/2003CN1106748C Apparatus and method for providing telephone user with control of threshold volume at which user's voice will take control
04/23/2003CN1106747C Echo-eliminating device
04/22/2003US6553122 Method and apparatus for multi-channel acoustic echo cancellation and recording medium with the method recorded thereon
04/17/2003US20030072439 System and method for implementation of an echo canceller
04/16/2003EP0870365B1 Gauging convergence of adaptive filters
04/15/2003US6549627 Generating calibration signals for an adaptive beamformer
04/09/2003EP1301040A1 Electronic digital door opener
04/09/2003EP1301018A1 Apparatus and method for modifying a digital signal in the coded domain
04/09/2003EP1300963A1 Echo processing apparatus
04/09/2003CN1409568A Sound feedback preventive circuit of honeycomb type loudspeaker
04/08/2003US6546099 Arrangement for suppressing an interfering component of an input signal
04/08/2003US6546098 System and method for distributing enhanced telephony service to customer premises equipment
04/08/2003US6545985 Echo cancellation mechanism
04/08/2003CA2330804C Key telephone system and interface unit for key telephone
04/03/2003WO2003009529A3 Emulation of phone extensions in a packet telephony distribution system
04/03/2003US20030065507 Network unit and a method for modifying a digital signal in the coded domain
04/03/2003US20030063736 Systems and methods for side-tone noise suppression
04/02/2003EP1298815A2 Echo processor generating pseudo background noise with high naturalness
03/2003
03/27/2003US20030059062 Circuit to prevent acoustic feedback for a cellular speakerphone
03/27/2003US20030059034 Noise compensation methods and systems for increasing the clarity of voice communications
03/26/2003EP1295406A1 Echo suppression using adaptive gain based on residual echo energy
03/26/2003CN1405991A Echo treatment apparatus
03/25/2003US6539091 Apparatus for sidetone damping
03/25/2003US6539085 Automatic phone line re-allocation
03/25/2003US6539084 Intercom system
03/20/2003WO2002089458A8 Audio conference platform with dynamic speech detection threshold
03/20/2003WO2002078314A3 Network echo suppression in mobile stations
03/20/2003US20030053617 System and method for updating filter coefficients and echo canceller including same
03/18/2003US6535715 Hybrid/fiber coax video and telephony communication system with poly-phase filtering
03/18/2003US6535604 Voice-switching device and method for multiple receivers
03/18/2003CA2148384C Methods for performing intelligent network services with an isdn network terminator located at a subscriber's premise
03/13/2003WO2003020006A2 Circuit and method for acoustic source directional pattern determination utilizing two microphones
03/13/2003WO2002080126A3 Hospital bed and network system
03/13/2003WO2002021817A3 Method and system for elimination of acoustic feedback
03/12/2003CN1402513A 按键电话系统及其主装置 Key telephone system and its main unit
03/06/2003US20030044025 Circuit and method for acoustic source directional pattern determination utilizing two microphones
03/06/2003US20030043999 Echo canceller having improved non-linear processor
03/05/2003EP1287672A2 Method and device for acoustic echo cancellation combined with adaptive beamforming
02/2003
02/27/2003WO2002073814A3 Transmit/receive arbitrator
02/27/2003US20030040932 Management device, method and system
02/27/2003US20030039353 Echo cancellation processing system
02/26/2003EP1286519A1 System, device, guard manager and method for intrusion management of guarded areas
02/20/2003US20030035550 Broadcast receiving system
02/20/2003US20030035523 System and method for virtual multiline telephony in a home-network telephone
02/20/2003US20030035521 Key telephone system and main unit thereof
1 ... 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 ... 82