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)
12/2000
12/20/2000EP1060608A1 Echo canceller employing dual-h architecture having improved coefficient transfer
12/19/2000US6163608 Methods and apparatus for providing comfort noise in communications systems
12/14/2000WO2000076195A1 Symmetry based subband acoustic echo cancellation
12/14/2000WO2000076179A1 Noise reduction circuit for telephones
12/14/2000WO2000076176A2 Loudspeaker volume range control
12/14/2000WO2000076081A2 Methods and apparatus for improved sub-band adaptive filtering in echo cancellation systems
12/14/2000DE19926660A1 Telephone terminal unit can hold several calls has display and keypad to allow user selection
12/14/2000DE19925261A1 Communications device with echo compensator and adaptive double-talk detector
12/12/2000US6160886 Methods and apparatus for improved echo suppression in communications systems
12/12/2000CA2142147C Echo cancelling method and apparatus using fast projection scheme
12/11/2000CA2274205A1 Method and apparatus for providing interoperability between remote key system units
12/07/2000WO2000074379A1 Method and device for incorporating advertising into videotelephone communications
12/07/2000WO2000074363A1 Method and device for suppressing background noise and echoes
12/07/2000WO2000074362A2 Methods and apparatus for improving adaptive filter performance by inclusion of inaudible information
12/07/2000WO2000074361A1 Residual echo suppression
12/07/2000WO2000074350A2 Adaptability to multiple hands-free communication accessories
12/07/2000DE19924663A1 Verfahren und Anordnung zum Einblenden von Werbung in Bildtelefonate Method and apparatus for superimposing advertising in video calls
12/05/2000CA2215592C Stereophonic acoustic echo cancellation using nonlinear transformations
11/2000
11/30/2000WO2000072567A1 Acoustic echo cancellation
11/30/2000WO2000072566A1 Methods and apparatus for improving adaptive filter performance by signal equalization
11/30/2000WO2000072565A1 Enhancement of near-end voice signals in an echo suppression system
11/30/2000WO2000072564A2 Echo compensation device
11/30/2000WO2000072556A1 System and method for near-end talker detection by spectrum analysis
11/29/2000EP1055318A2 Method for improving acoustic noise attenuation in hand-free devices
11/29/2000EP1055317A1 Method for improving acoustic noise attenuation in hand-free devices
11/29/2000EP1055292A1 Methods and apparatus for controlling filter adaption in noise
11/29/2000CN1275001A Adaptive filter emitting control in echo suppressor using structure lagging amplitude distribution estimation method
11/28/2000US6154660 Callee-based telephone line preselection
11/28/2000US6154639 Handsfree unit
11/23/2000WO2000070854A1 Methods and apparatus for improving adaptive filter initialization and recovery in bi-directional communications systems
11/23/2000WO2000070853A2 Volume control for a communications device including an echo canceller
11/22/2000EP1053628A1 Echo canceller having improved non-linear processor
11/21/2000US6151614 Adaptive filter and adapting method thereof
11/16/2000WO2000033553A3 Control interface protocol for telephone sets for a satellite telephone system
11/15/2000EP1052838A1 Method and device for stereo echo cancelling by filtering in the frequency domain
11/15/2000EP1052837A2 Page in a selected phone group
11/15/2000EP1052619A2 Adaptive filter divergence control in echo cancelers by means of amplitude distribution evaluation with configurable hysteresis
11/15/2000EP1051835A1 Generating calibration signals for an adaptive beamformer
11/15/2000CN1273483A Calling in selected telephone group
11/14/2000US6148078 Methods and apparatus for controlling echo suppression in communications systems
11/14/2000US6148003 Information distribution system
11/14/2000US6147979 System and method for echo cancellation in a communication system
11/12/2000CA2307999A1 Method and device for cancelling stereophonic echo with frequency domain filtering
11/02/2000WO2000065818A1 Apparatus and method for detecting far end speech
11/02/2000WO2000065817A2 Hands-free device and method of operating the same
11/02/2000DE19919370A1 Freisprecheinrichtung und Verfahren zum Betrieb einer solchen Speakerphone and method for operating such
11/02/2000DE19918893A1 Home communication system, has CPU and two terminals which are connected together by bus
11/02/2000DE19918891A1 Building access system has door opener which can only be actuated if two switches are operated simultaneously
11/02/2000CA2372142A1 Apparatus and method for detecting far end speech
10/2000
10/31/2000USRE36934 Control device for a hands-free telephone set
10/31/2000US6141415 Method and apparatus for detecting speech at a near-end of a communications system, a speaker-phone system, or the like
10/31/2000US6141338 System for and method of exchanging server data in packet unit
10/31/2000CA2215779C Exchanging apparatus and control method for exchanging and connecting destination terminal and calling terminal, and communication terminal apparatus communicating with other terminals through communication network and control method
10/26/2000WO1999053717A3 Communication system
10/25/2000EP1046273A1 Methods and apparatus for providing comfort noise in communications systems
10/25/2000EP1046272A2 Methods and apparatus for improved echo suppression in communications systems
10/25/2000EP1046128A1 Method and apparatus for image capture, compression and transmission of a visual image
10/24/2000US6138040 Method for suppressing speaker activation in a portable communication device operated in a speakerphone mode
10/24/2000US6137881 Adaptive filtering method and apparatus employing modified fast affine projection algorithm
10/18/2000EP1044558A1 Methods and apparatus for controlling echo suppression in communications systems
10/17/2000CA2036521C Intrinsically safe telephone
10/12/2000WO2000060841A1 Method and apparatus for space-time echo cancellation
10/12/2000WO2000060830A2 Mobile telephone
10/12/2000DE19914724A1 Method for programming house system by assigning registering address for central processing unit then all running timers for the addressing time interval are stopped
10/11/2000EP1042903A1 Echo canceller employing dual-h architecture having improved non-linear echo path detection
10/11/2000CN1269902A Method and apparatus for measuring signal level and delay at multiple sensors
10/05/2000DE19923601C1 Echo compensation device for hands-free telephone, uses calibration signal for providing coefficients for echo replicator simulating loudspeaker-room-microphone system
10/04/2000EP1040633A1 Echo canceller employing dual-h architecture having variable adaptive gain settings
10/03/2000US6128480 Fixed subscriber unit for telecommunications
09/2000
09/28/2000WO2000057377A1 Security systems
09/28/2000CA2367110A1 Security systems
09/27/2000EP1039736A1 Method and device for adaptive identification and related adaptive echo canceller
09/26/2000US6125179 Echo control device with quick response to sudden echo-path change
09/21/2000WO2000056071A1 Telephone adapter and telephone system providing multiple telephone lines
09/21/2000WO2000056036A2 Echo suppression device and method for performing the same
09/20/2000CN1267141A Adaptive step length of echo canceller and method for carrying out same
09/19/2000US6122369 Communication process device and method therefor
09/13/2000CN2396589Y Indoor intercom
09/12/2000US6118863 Exchanging apparatus and control method for exchanging and connecting destination terminal and calling terminal, and communication terminal apparatus communicating with other terminals through communication network and control method
09/08/2000WO2000052917A1 Method and device for suppressing noise in telephone devices
09/06/2000CN2395484Y Converter for hand held telephone and hand free device
08/2000
08/30/2000EP1031191A2 Method and device at stereo acoustic echo cancellation
08/22/2000US6108413 Echo cancellation method and echo canceller implementing such a process
08/02/2000EP1024610A2 An Internet Service Provider system using non-geosynchronous orbit satellites
08/02/2000CN1262012A Improved acoustic echo canceler for telecommunications system
08/01/2000US6097971 Hands-free speech communication apparatus
07/2000
07/27/2000DE10000939A1 Call answering method for car, involves reacting to call received from different system, even for image containing call reception
07/26/2000EP1022866A1 Echo elimination method, echo canceler and voice switch
07/26/2000CA2296202A1 Isp system using non-geosynchronous orbit satellites
07/25/2000CA2207461C Non-constant echo return loss for telephone terminal with handsfree
07/19/2000EP1020827A1 Patient/nurse communication method
07/19/2000EP1020068A1 Echo compensation method, echo compensation device and telecommunication device
07/19/2000EP1019847A1 System for dynamically adapting the length of a filter
07/18/2000US6091965 Low-feedback compact wireless telephone
07/18/2000US6091937 Method and apparatus for the automatic adjustment of a switch means for automatic switching between a reception operating mode and a transmission operating mode in a hands-free means of a communication terminal equipment
07/18/2000US6091813 Acoustic echo canceller
07/13/2000WO2000041330A1 Acoustic echo canceller with fast volume control compensation
07/12/2000EP1018715A1 Patient/nurse communication method
07/12/2000EP0965214A4 Method and apparatus for telephone intercom doorbell response system
07/12/2000EP0771502B1 Bell system and/or multiple door intercom system
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