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)
08/2005
08/05/2005CA2495637A1 System and method for providing a local time of far end on telephone systems
08/04/2005WO2005071934A1 Robust adaptive filter for echo cancellation
08/04/2005WO2005070146A2 Headphone receiver apparatus for use with low power transmitters
08/04/2005US20050169459 System and method for enhanced subjective stereo audio
08/04/2005CA2551745A1 Method and apparatus for single end loop testing for dsl provisioning and maintenance
08/03/2005EP0983678B1 Method and device for reducing multi-channel acoustic echo and adapting sound to space conditions
08/03/2005CN1649374A Systems and methods for echo cancellation with arbitrary playback sampling rates
08/03/2005CN1213549C Method for realizing echo counteraction
08/02/2005US6925178 Returning ringing signals through the tip amplifier of subscriber-line interface circuitry
08/02/2005US6925177 Echo canceler compensating for amplifier saturation and echo amplification
08/02/2005US6925176 Method for enhancing the acoustic echo cancellation system using residual echo filter
08/02/2005US6925172 Line interface with gain feedback coupled matching impedance
08/02/2005CA2211994C Apparatus and method for canceling acoustic echoes including non-linear distortions in loudspeaker telephones
07/2005
07/28/2005WO2005069239A1 Door signal device
07/28/2005WO2005067426A2 Modifications to telephones in combination of aesthetic and extra-functional values
07/28/2005US20050164682 Incoming call management in a push-to-talk communication system
07/28/2005US20050163310 Communication device keypad illumination
07/28/2005US20050163308 Technique for independent ground fault detection of multiple twisted pair telephone lines connected to a common electrical power source
07/28/2005DE202005007079U1 Mobile telephone for opening and closing e.g. apartment entrance door, has memory cell and is integrated with control device that controls opening and closing of entrance or garage door opening device based on codes in cell when activated
07/28/2005DE102004010667A1 Netzwerkkommunikationsvorrichtung und Hybrid-Schaltung davon Network communication apparatus and hybrid circuit thereof
07/27/2005CN2713755Y Acoustic control apparatus for bidirectional intercommunication system
07/27/2005CN1212720C Integrated residence intercommunication system
07/26/2005US6922403 Acoustic echo control system and double talk control method thereof
07/21/2005US20050157869 Fixed base assembly of mobile phone
07/21/2005US20050157868 Fixed base assembly of mobile phone
07/21/2005US20050157866 System and method for enhanced stereo audio
07/21/2005DE102004059675A1 Bluetooth-Endgerät Bluetooth terminal
07/20/2005EP1554865A1 Integrated noise cancellation and residual echo supression
07/20/2005CN2711998Y Double-sound multi-frequency controlled elevator intercom bus system device
07/20/2005CN1211988C Device and method for radio terminal with handsfree function
07/19/2005US6919918 Electronic digital door opener
07/14/2005WO2005064908A1 System and method for enchanced subjective stereo audio
07/14/2005US20050152535 Headphone receiver apparatus for use with low power transmitters
07/14/2005US20050152534 Robust adaptive filter for echo cancellation
07/14/2005US20050152533 Subscriber line interface circuitry transceiver
07/12/2005US6917688 Adaptive noise cancelling microphone system
07/12/2005US6917682 Method and device for echo cancelling
07/07/2005WO2005062595A1 System and method for enhanced stereo audio
07/07/2005WO2005060583A2 A double talk activity detector and method for an echo canceler circuit
07/07/2005WO2005060582A2 A downlink activity and double talk probability detector and method for an echo canceler circuit
07/07/2005US20050147235 Method, apparatus and articles incorporating a step size control technique for echo signal cancellation
07/07/2005US20050147234 Subscriber line interface circuitry transceiver
07/07/2005US20050147232 Subscriber line interface circuitry transceiver
07/07/2005US20050147231 Subscriber line interface circuitry with current drivers for downstream voice and data signals
07/07/2005US20050147230 Dual adaptive filter apparatus and method
07/07/2005US20050147229 Versatile circuit for interfacing with audio headsets
07/06/2005EP0861547B1 Information distribution system
07/06/2005EP0748555B1 Acoustic echo suppressor with subband filtering
06/2005
06/30/2005WO2005002183B1 Statistical adaptive-filter controller
06/30/2005US20050141701 Recharging terminal
06/30/2005US20050141699 Modifications to telephones in combination of aesthetic and extra-functional values
06/30/2005US20050141697 Network communication device and hybrid circuit thereof
06/30/2005US20050141570 Localization of an ip telecommunications terminal over a lan
06/30/2005US20050141529 Communication apparatus and communication system
06/28/2005US6912281 Route delay sensitive echo cancellation
06/28/2005CA2133155C Key telephone apparatus
06/23/2005US20050135602 Enhanced low pass filter
06/23/2005US20050135584 Methods and systems for communication from an exterior of a location
06/23/2005US20050135297 Bluetooth terminal
06/23/2005DE19848608B4 Vorrichtung zur Vermeidung einer akustischen Rückkopplung Device for avoidance of acoustic feedback
06/22/2005EP1543673A1 Full duplex telephone set using echo cancellation and side tone management for high gain stability
06/22/2005CN1630216A 蓝牙终端 Bluetooth devices
06/22/2005CN1207884C Loudspeaker volume range control
06/21/2005US6909041 Sound field control method and sound field control system
06/16/2005US20050130711 Apparatus and method for canceling residual echo in a mobile terminal of a mobile communication system
06/16/2005US20050129226 Downlink activity and double talk probability detector and method for an echo canceler circuit
06/16/2005US20050129225 Double talk activity detector and method for an echo canceler circuit
06/16/2005US20050129224 Echo canceler circuit and method
06/16/2005US20050129223 Echo canceler circuit and method
06/16/2005US20050129204 Audio intercom with stacklight indication system and method
06/15/2005EP1542444A2 An echo canceler circuit and method
06/15/2005EP1542374A1 An echo canceler circuit and method
06/14/2005US6907122 Rotational split adaptor
06/09/2005WO2005053278A2 Method and apparatus for interfacing analog data devices to a cellular transceiver with analog modem capability
06/09/2005WO2005053277A2 Method and apparatus for adaptive echo and noise control
06/09/2005US20050123129 Method and apparatus for reducing echo in a communication system
06/09/2005DE10351793A1 Vorrichtung und Verfahren zum Verarbeiten eines Eingangssignals Apparatus and method for processing an input signal
06/08/2005CN1205798C Method and system for scaleable near-end speech cancellation for tip and ring tone signal detectors
06/07/2005US6904146 Full duplex echo cancelling circuit
06/02/2005WO2005050622A1 Method and apparatus for reducing echo in a communication system
06/02/2005US20050117741 Telephone plug and jack with transmission various signals
06/02/2005US20050117739 Apparatus and method for echo cancellation
06/02/2005US20050117603 Telephone communication system over a single telephone line
06/02/2005CA2538859A1 Method and apparatus for reducing echo in a communication system
06/01/2005EP1415434A4 Emulation of phone extensions in a packet telephony distribution system
05/2005
05/31/2005US6901143 Voice switching system capable of improving a quality of conversation
05/31/2005US6901141 Echo canceller
05/26/2005WO2005048578A1 Subscriber selectable alternative to audible ringback signals
05/26/2005WO2005048572A2 Two-way communications device having a single transducer
05/26/2005US20050113085 Method and apparatus for interfacing analog data devices to a cellular transceiver with analog modem capability
05/26/2005US20050113060 Wireless network system
05/26/2005US20050111656 Modified affine projection algorithm for non-stationary signal
05/26/2005US20050111655 Method and apparatus for adaptive echo and noise control
05/24/2005US6898281 System and method for filtering echo/NEXT signal interferrence
05/19/2005WO2005046194A1 Device and method for processing an input signal
05/19/2005WO2005046076A1 Echo suppression device
05/19/2005US20050105716 Detection of both voice and tones using Goertzel filters
05/18/2005EP1531650A2 Hearing instrument having a wireless base unit
05/18/2005CN1618205A Localization of an IP telecommunications terminal over a LAN
05/18/2005CN1202628C Method for modulating noise shielding and noise interfrence in speech communication
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