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)
12/2003
12/04/2003WO2003100372A1 Method in a digital network system for controlling the transmission of terminal equipment
12/04/2003US20030223561 Intercom apparatus
12/03/2003EP1366615A2 Transmit/receive arbitrator
12/02/2003US6658107 Methods and apparatus for providing echo suppression using frequency domain nonlinear processing
11/2003
11/27/2003US20030218972 Generating an undisturbed signal out of an audio signal including a disturbing signal
11/26/2003EP1044558B1 Methods and apparatus for controlling echo suppression in communications systems
11/26/2003CN1458508A Equipment state detection managing system and method
11/20/2003US20030215096 Method and apparatus for active latency characterization
11/19/2003CN1128561C Method and apparatus for communicatnig engineering orderwire information over synchronous communications network, and network
11/19/2003CN1128544C Flat display and TV interphone system using the same
11/13/2003WO2003094486A1 Full duplex echo cancelling circuit
11/13/2003US20030210779 Automatic rapid switching between DSL service and POTS over loaded loops
11/13/2003US20030210773 Digital subscriber line service over loaded loops
11/12/2003EP1361741A1 System and method for virtual multiline telephony in a home-network
11/12/2003CN1455572A Improved sound-echo elimination
11/12/2003CN1127840C Method and apparatus for noise and echo suppression in two-way communication chair circuit
11/12/2003CN1127813C Double talk and echo path change detection in telephony system
11/11/2003US6647097 Telephone system for voice recognition
11/11/2003US6647023 Voice coding conversion circuit between office exchange and ISDN keyphone system
11/06/2003WO2003092255A1 Audio bandwidth extending system and method
11/06/2003US20030206624 Full duplex echo cancelling circuit
10/2003
10/30/2003US20030202654 Acoustic echo cancellation
10/29/2003EP1357733A1 Audio bandwidth extending system and method
10/29/2003CN1452381A Monitoring and controlling system for apartment building and central server thereof
10/29/2003CN1126355C Fixed subscriber unit of wireless local loop system
10/28/2003CA2311051C Method and apparatus for canceling echo
10/23/2003WO2003088637A1 Communications device for transmitting acoustic signals in a motor vehicle
10/23/2003WO2003088636A1 Video doorphone
10/22/2003EP1355481A2 Method for programming an intercom
10/22/2003CN1451226A Method and device for acoustic echo cancellation combined with adaptive beamforming
10/22/2003CN1451225A Echo cancellation device for cancelling echos in a transceiver unit
10/21/2003US6636748 Method and apparatus for image capture, compression and transmission of a visual image over telephone or radio transmission system
10/21/2003US6636604 Method and device for suppressing echo in a hands free device such as a telephone
10/16/2003US20030195390 Digital laryngoscope
10/16/2003US20030193932 System for and method of exchanging server data in packet unit
10/16/2003US20030193563 Television door intercom apparatus
10/14/2003US6633631 Digital key telephone system and extension terminal device thereof
10/08/2003EP1351479A1 Generating an undisturbed signal out of an audio signal including a disturbing signal
10/08/2003EP1046272B1 Methods and apparatus for improved echo suppression in communications systems
10/02/2003US20030185402 Adaptive distortion manager for use with an acoustic echo canceler and a method of operation thereof
10/02/2003US20030185367 Collective housing intercom apparatus
10/02/2003US20030184648 Television intercom system
10/01/2003CN1445958A Internal communication collecting cut-off connection information terminal system
10/01/2003CN1123196C Two-wire interphone system with plurality of monitors
10/01/2003CN1123191C Method and apparatus for adaptive volume control
10/01/2003CN1123178C Method for implementing audio telephon in processing device network and central processer
10/01/2003CN1122963C Method and apparatus for measuring signal level and delay at multiple sensors
09/2003
09/30/2003US6628781 Methods and apparatus for improved sub-band adaptive filtering in echo cancellation systems
09/30/2003US6628779 Method and system for scaleable near-end speech cancellation for tip and ring tone signal detectors
09/25/2003WO2003077738A1 Digital laryngoscope
09/18/2003WO2003077594A1 Howling control device and howling control method
09/18/2003US20030176178 Wireless communication terminal
09/18/2003US20030174824 Page in a selected phone group
09/18/2003US20030174661 Acoustic echo canceller
09/18/2003CA2447144A1 Howling control device and howling control method
09/17/2003EP1345336A1 Automatic gain control method for echo attenuation
09/16/2003US6622030 Echo suppression using adaptive gain based on residual echo energy
09/16/2003US6621816 System for and method of exchanging server data in packet unit
09/10/2003EP1342198A2 Call management system
09/09/2003US6618481 Method for improving acoustic sidetone suppression in hands-free telephones
09/03/2003EP1341399A2 Sound field control method and sound field control system
09/03/2003EP1341365A1 Method and arrangement for processing a speech signal
09/03/2003CN1120637C Method for setting up connection between mobile radio network and destination cell number in private communication network
09/02/2003US6614907 Echo canceller employing dual-H architecture having variable adaptive gain settings
08/2003
08/28/2003WO2003071738A1 Localization of an ip telecommunications terminal over a lan
08/28/2003US20030160682 Medical communication system
08/28/2003US20030159569 Sound field control method and sound field control system
08/26/2003US6611601 Echo sound signal suppressing apparatus
08/21/2003US20030156723 Process and apparatus for eliminating loudspeaker interference from microphone signals
08/21/2003US20030156711 Echo processing apparatus
08/20/2003CN1119009C Safety switch-in telephone extension system
08/19/2003US6608898 Band pass and notch filters for echo reduction with less phase distortion
08/19/2003US6608897 Double-talk insensitive NLMS algorithm
08/19/2003US6608835 Communication system with multicarrier telephony transport
08/19/2003CA2335224C Acoustic echo canceller
08/14/2003US20030152216 Acoustic enhancement of frequencies with large amplitude variation in an active noise cancellation system
08/13/2003EP0983677A4 Method and apparatus for installing telephone intercom-voice messaging apparatus at doorbell for dwelling
08/13/2003CN1118179C Echo removing apparatus
08/12/2003US6606382 System and method for implementation of an echo canceller
08/12/2003US6606351 Ingress protection in a communication system with orthogonal carriers
08/07/2003WO2003065703A1 Telephone having four vad circuits
08/07/2003WO2003065693A2 Analog voice activity detector for telephone
08/07/2003US20030149495 Techniques for variable sample rate conversion
08/07/2003US20030147542 Outer mirror and interphone for a vehicle
08/06/2003EP1333654A1 Door phone, learning method and use method therefor
08/05/2003US6603822 Communicating errors in a telecommunications system
08/05/2003CA2237454C A circuit arrangement for providing internet connectivity to a key telephone user
07/2003
07/31/2003US20030142813 Telephone having four VAD circuits
07/31/2003US20030142812 Analog voice activity detector for telephone
07/24/2003WO2003061258A1 System and method for controlling a filter to enhance speakerphone performance
07/24/2003WO2003061152A1 Method and apparatus for acoustic echo cancellation in a communication system providing tty/tdd service
07/24/2003US20030137946 Method and apparatus for acoustic echo cancellation in a communication system providing TTY/TDD service
07/24/2003CA2441404A1 Method and apparatus for acoustic echo cancellation in a communication system providing tty/tdd service
07/23/2003EP1330046A1 Method and apparatus for acoustic echo cancellation in a communication system providing tty/tdd service
07/23/2003CN1431847A 医疗通信系统 Medical Communication Systems
07/22/2003US6597787 Echo cancellation device for cancelling echos in a transceiver unit
07/17/2003US20030133565 Echo cancellation system method and apparatus
07/16/2003CN1430862A Telephone communication system over single telephone line
07/16/2003CN1115057C 数字按钮电话系统 Digital button phone system
07/16/2003CN1115039C Handfree phone
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