| Patents for H04M 9 - Arrangements for interconnection not involving centralised switching (8,105) |
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| 05/01/2013 | CN103081453A Intercommunication system |
| 05/01/2013 | CN102045467B Audio signal sound production system for eliminating environmental noise |
| 04/30/2013 | US8433074 Echo suppressing method and apparatus |
| 04/30/2013 | US8433061 Reducing echo |
| 04/30/2013 | US8433060 Method and system for stereo echo cancellation for VoIP communication systems |
| 04/30/2013 | US8433059 Echo canceller canceling an echo according to timings of producing and detecting an identified frequency component signal |
| 04/30/2013 | US8433058 Method and system for distributed speakerphone echo cancellation |
| 04/30/2013 | US8433040 Telephone switchboard and electronic device for providing power to load having different resistance values at different operation modes |
| 04/30/2013 | DE202011110280U1 Türsprechanlage Door Phone |
| 04/24/2013 | CN103067629A Echo cancellation device |
| 04/24/2013 | CN103067628A Restraining method of residual echoes and device thereof |
| 04/24/2013 | CN101491072B Echo cancellation and noise reduction adaptation during ringing signal playback |
| 04/23/2013 | US8428250 Pivot braking structure of relative sliding device |
| 04/23/2013 | US8428249 Automatic slide cover opening/closing device |
| 04/23/2013 | US8428248 System and method for mirroring power over ethernet registers in a physical layer device over a single isolation boundary |
| 04/23/2013 | US8428247 Echo mitigation in a conference call |
| 04/18/2013 | WO2013053271A1 Mobile phone and call signal processing method for same |
| 04/18/2013 | DE102006049213B4 Hörsystem mit Fernbedienung als Basisstation und entsprechendes Kommunikationsverfahren Hearing system with remote control base station and appropriate communication method |
| 04/18/2013 | DE102005053708B4 Verfahren zum Betreiben einer Hauskommunikationsanlage sowie Hauskommunikationsanlage Method for operating a home communication system as well as House communication system |
| 04/17/2013 | CN103051818A Device and method for cancelling echoes in miniature hands-free voice communication system |
| 04/17/2013 | CN103051816A Digital audio matrix and telephone conference system |
| 04/16/2013 | US8422666 Wall mount telephone and wall mount telephone assembly |
| 04/16/2013 | US8422665 Telephone device for detecting status of a handset with light detection |
| 04/16/2013 | US8422663 Structure and method for echo reduction without loss of information |
| 04/16/2013 | US8422662 Splitter wall plates for digital subscriber line (DSL) communication systems and methods to use the same |
| 04/16/2013 | US8422660 Communication system having common ground mechanism |
| 04/11/2013 | US20130089199 Communication System in a Package Formed on a Metal Microstructure |
| 04/10/2013 | CN202872916U Colinear remote data-voice co-transmission equipment |
| 04/10/2013 | CN103037121A Squeaking elimination method and squeaking elimination system and hand-free phone |
| 04/10/2013 | CN102185992B Bidirectional active denoising device for mobile phone |
| 04/09/2013 | US8416946 System and process for regression-based residual acoustic echo suppression |
| 04/09/2013 | US8416945 Adaptive duplexing for amplified telephone |
| 04/04/2013 | US20130083911 Methods and apparatuses for multi-channel acoustic echo cancelation |
| 04/02/2013 | US8411849 Personal electronic device storage apparatus and associated method |
| 04/02/2013 | US8411848 Telephone interface circuit for providing over-current and over-voltage protection |
| 04/02/2013 | US8411847 Acoustic echo canceller |
| 04/02/2013 | US8411846 Echo path change detection in telecommunications networks |
| 03/28/2013 | US20130077777 Input/output apparatus and communication terminal |
| 03/28/2013 | US20130077776 Method, System and Computer Program Product for Acoustic Echo Cancellation |
| 03/27/2013 | CN1842109B Method for implementing audio telephone and central conversion processor |
| 03/27/2013 | CN103002171A Processing audio signals |
| 03/27/2013 | CN103002170A Audio equipment including means for de-noising a speech signal by fractional delay filtering |
| 03/27/2013 | CN103002169A Signal transmission method, signal transmission circuit, network connection method and network device |
| 03/27/2013 | CN101953145B Apparatus and method for computing control information for an echo suppression filter and apparatus and method for computing a delay value |
| 03/27/2013 | CN101304460B Sound echo inhibitor for hand free voice communication |
| 03/26/2013 | US8406420 Magnetic-push slide cover driving device |
| 03/26/2013 | US8406419 Slide hinge apparatus |
| 03/26/2013 | US8406418 Headset with a 360 degrees rotatable microphone boom and function selector |
| 03/26/2013 | US8406417 Overvoltage protection with power sink |
| 03/26/2013 | US8406416 Configuring virtual noise parameters of very high-speed digital subscriber line |
| 03/26/2013 | US8406415 Privacy modes in an open-air multi-port conferencing device |
| 03/26/2013 | US8406414 Method and apparatus for dynamically scheduling ringing signals |
| 03/26/2013 | US8406115 Systems and methods for orthogonal frequency division multiplexing |
| 03/20/2013 | CN102984406A Method used for detecting double-end conversation conditions and system thereof |
| 03/20/2013 | CN101263705B Sound pick-up method and device for, in particular in handsfree telephone terminals |
| 03/19/2013 | US8401513 Proximity sensor, in particular microphone for reception of sound signals in the human audible sound range, with ultrasonic proximity estimation |
| 03/19/2013 | US8401178 Multiple microphone switching and configuration |
| 03/19/2013 | US8401177 Combined sidetone and hybrid balance |
| 03/19/2013 | US8401176 Acoustic echo canceller with multimedia training signal |
| 03/19/2013 | US8401175 Internet protocol telephone system |
| 03/19/2013 | US8401174 System and method for optimizing termination impedance for an analog telephone line |
| 03/14/2013 | WO2013034034A1 Method, system and digital microphone for cancelling echo |
| 03/14/2013 | US20130064360 Digital intercom network over dc-powered microphone cable |
| 03/13/2013 | EP2568695A1 Method and device for suppressing residual echo |
| 03/13/2013 | EP2568619A1 Echo cancelling-codec |
| 03/13/2013 | EP2568531A1 Mobile wireless communications device including acoustic coupling based impedance adjustment and related methods |
| 03/13/2013 | CN202798898U Communication system in man lock chamber of shield type heading machine |
| 03/13/2013 | CN202798897U Half-duplex PTT (push to talk) voice transmission system based on telephone network |
| 03/13/2013 | CN102968999A Audio signal processing |
| 03/13/2013 | CN102968993A Audio signal decorrelator |
| 03/12/2013 | US8396520 Portable terminal having a slide module with a tilting unit |
| 03/12/2013 | US8396207 Sliding mechanism |
| 03/12/2013 | US8396206 Multi-channel communication device and methods for reducing echoes by inserting a training sequence under a spectral mask |
| 03/09/2013 | CA2788916A1 Echo cancelling codec |
| 03/06/2013 | CN102959877A Echo canceller |
| 03/06/2013 | CN102957819A Audio signal processing signals |
| 03/06/2013 | CN101502091B Audio signal decorrelator |
| 03/05/2013 | US8391791 Distributed sound enhancement |
| 03/05/2013 | US8391504 Method and system for artificial reverberation employing dispersive delays |
| 03/05/2013 | US8391472 Acoustic echo cancellation solution for video conferencing |
| 03/05/2013 | US8391471 Echo suppressing apparatus, echo suppressing system, echo suppressing method and recording medium |
| 03/05/2013 | US8391470 Device, method and system for estimating the termination to a wired transmission-line based on determination of characteristic impedance |
| 02/28/2013 | WO2012044462A8 Echo control optimization |
| 02/27/2013 | EP2561674A1 Echo cancellation of a user interface tone |
| 02/27/2013 | EP2561624A1 An echo canceller and a method thereof |
| 02/26/2013 | US8385976 Multi-SIM cellular telephone |
| 02/26/2013 | US8385539 Method and arrangement for controlling adaptive filters |
| 02/26/2013 | US8385538 Method, system, and apparatus for a differential transformer-free hybrid circuit |
| 02/21/2013 | WO2013025346A1 Clock skew compensation for acoustic echo cancellers using inaudible tones |
| 02/21/2013 | US20130044873 Clock Skew Compensation for Acoustic Echo Cancellers Using Inaudible Tones |
| 02/21/2013 | US20130044872 Echo canceller and a method thereof |
| 02/19/2013 | US8380262 Slide phone |
| 02/19/2013 | US8379840 Push-push slide mechanism |
| 02/19/2013 | US8379839 Method and apparatus for controlling ringing voltage |
| 02/19/2013 | US8379779 Echo cancellation for a packet voice system |
| 02/19/2013 | US8379488 Smart-watch including flip up display |
| 02/19/2013 | US8378746 Voltage-mode line driving circuit having adaptive impedance matching |
| 02/13/2013 | CN102932569A Wireless headset type awakening equipment |
| 02/12/2013 | US8374851 Voice activity detector and method |
| 02/12/2013 | US8374355 Robust and efficient frequency-domain decorrelation method |