Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 3 - Line transmission systems
Patents for H04B 3 - Line transmission systems (31,523)
12/2000
12/14/2000WO2000076195A1 Symmetry based subband acoustic echo cancellation
12/14/2000WO2000076176A2 Loudspeaker volume range control
12/14/2000WO2000076081A2 Methods and apparatus for improved sub-band adaptive filtering in echo cancellation systems
12/14/2000WO2000076052A1 Utility data transfer system and method
12/14/2000WO2000075795A1 Data transmission system
12/14/2000DE19926006A1 Datenübertragungseinrichtung Data transmission device
12/14/2000DE19920024A1 Hochfrequenz-Einspeisung in Niederspannungs-Energieleitungen High-frequency power supply in low-voltage power lines
12/14/2000CA2311473A1 Method and system of communicating in a subterranean well
12/13/2000EP1059704A2 Communication connector assembly with crosstalk compensation
12/13/2000CN1276896A Method for suppressing noise in digital speech signal
12/13/2000CN1276654A Communication system for ultra-low-frequency and ultra-narrow-band distribution network
12/13/2000CN1059527C Method for communication using power line
12/13/2000CN1059526C Method of communication using low-voltage wire of power grid
12/12/2000US6160886 Methods and apparatus for improved echo suppression in communications systems
12/12/2000US6160820 Multi-carrier transmission systems
12/12/2000US6160790 Crosstalk canceller system and method
12/12/2000US6160452 Circuits and methods for a monitoring circuit in a network amplifier
12/07/2000WO2000074362A2 Methods and apparatus for improving adaptive filter performance by inclusion of inaudible information
12/07/2000WO2000074350A2 Adaptability to multiple hands-free communication accessories
12/07/2000WO2000074244A1 Droop-free quasi-continuous reconstruction filter interface
12/07/2000DE19907095C1 Schaltung zur kapazitiven Ankopplung einer Datenübertagungseinrichtung an ein Energieübertragungsnetz, und Koppeleinheit mit Ankoppelschaltung Circuit for capacitive coupling of a data transmission device to a power transmission network, and coupling unit with coupling circuit
12/07/2000CA2273658A1 Method and apparatus for cancelling common mode noise in communications channels
12/06/2000EP1058406A2 Method and apparatus for reducing the computational complexity and relaxing the critical path of reduced state sequence estimation (RSSE) techniques
12/06/2000EP1058403A1 Method for managing network equipment
12/06/2000EP1057291A1 System and method for factoring a merged wave field into independent components
12/06/2000EP1057259A1 Stable adaptive filter and method
12/06/2000CN1275842A Noise reducer
12/05/2000US6157909 Process and device for blind equalization of the effects of a transmission channel on a digital speech signal
12/05/2000US6157850 Signal processing apparatus
12/05/2000US6157810 Distribution of radio-frequency signals through low bandwidth infrastructures
12/05/2000US6157670 Background energy estimation
12/05/2000US6157292 Power distribution grid communication system
12/05/2000US6157254 Double side band pilot technique for a control system that reduces distortion produced by electrical circuits
12/05/2000CA2215592C Stereophonic acoustic echo cancellation using nonlinear transformations
12/05/2000CA2119680C Telecommunications circuit assemblies of wires and connectors
11/2000
11/30/2000WO2000072565A1 Enhancement of near-end voice signals in an echo suppression system
11/30/2000WO2000072557A2 Advanced double-talk detector
11/30/2000WO2000072556A1 System and method for near-end talker detection by spectrum analysis
11/30/2000WO2000072488A1 Digital subscriber's line transmitting method and device
11/30/2000WO2000072455A1 Reception method and receiver for mobile radiotelephone applications
11/30/2000WO2000027134A3 Method and apparatus for qualifying loops for data services
11/30/2000DE10001862A1 Adaptive distortion correction device has filter processing unit with series connected processing stages and suitable branching with coefficient set according to filter processing unit output
11/29/2000EP1056232A2 Information communication system and information transfer method
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
11/29/2000EP1055177A1 Method and apparatus for universal data exchange gateway
11/29/2000CN1275258A Method and apparatus for detecting data in magnetic recording using decision feedback
11/29/2000CN1275001A Adaptive filter emitting control in echo suppressor using structure lagging amplitude distribution estimation method
11/28/2000US6154859 Abnormality monitor method and abnormality monitor system in a network
11/28/2000US6154602 Equalizer for digital video disk player
11/28/2000US6154447 Methods and apparatus for detecting and locating cable failure in communication systems
11/28/2000CA2023821C Spread spectrum communications system for networks
11/23/2000WO2000070854A1 Methods and apparatus for improving adaptive filter initialization and recovery in bi-directional communications systems
11/23/2000WO2000070828A1 Local network for connecting network devices
11/23/2000WO2000070749A1 Broadcast transmission system with distributed correction
11/23/2000WO2000028691A3 Multi-pair gigabit ethernet transceiver
11/23/2000CA2373778A1 Broadcast transmission system with distributed correction
11/22/2000EP1054538A2 Fast training of equalizers in discrete multi-tone (DMT) systems
11/22/2000EP1054516A2 Power control in subscriber loop
11/22/2000EP1053629A2 Method for processing telephone signals delivered by an analog telephone terminal and data delivered by a data terminal
11/22/2000EP1053628A1 Echo canceller having improved non-linear processor
11/22/2000CN1274195A Electric limiter
11/21/2000US6151614 Adaptive filter and adapting method thereof
11/21/2000US6151480 System and method for distributing RF signals over power lines within a substantially closed environment
11/21/2000US6151330 Electric power supply management system
11/21/2000US6150875 Apparatus and method for equalizing received network signals using a transconductance controlled single zero single pole filter
11/17/2000CA2308185A1 Power control data delivery consistency in copper plant
11/16/2000WO2000069177A1 A surveillance system
11/16/2000WO2000069160A1 Method and apparatus for generating and transferring digitally encoded control messages
11/16/2000WO2000069136A1 Digital modulation signal measuring device and method capable of evaluating spectrum of noise component
11/16/2000WO2000069080A2 Pure delay estimation
11/16/2000DE19922200A1 Multimedia use of digital powerline technology involves using information subscription technique to relieve load on network; delivery service for operators and customers is incorporated
11/16/2000DE19918512C1 Schaltungsanordnung mit einer Reduktionsschaltung zur Reduktion von Störlängsspannungen auf einer Zweidrahtleitung Circuit arrangement with a reduction circuit for reducing Störlängsspannungen on a two-wire cable
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
11/15/2000EP1051633A1 Testing of catv systems
11/15/2000CN2406295Y Device for centralized taking-down numble of meter
11/15/2000CN1273648A Apparatus and method for reducing energy fluctuations in portable data device
11/14/2000US6148078 Methods and apparatus for controlling echo suppression in communications systems
11/14/2000US6148046 Blind automatic gain control system for receivers and modems
11/14/2000US6147963 Communications system for driving pairs of twisted pair links
11/09/2000WO2000067471A1 A status monitoring and data processing system suitable for use in a bi-directional communication device
11/09/2000WO2000067393A1 A data communication device
11/09/2000WO2000067392A1 Method and apparatus for quality evaluation of cable circuit
11/09/2000WO2000067391A1 Adaptation control algorithm for echo cancellation using signal-value based analysis
11/09/2000WO2000067390A1 Method and device for disturbance suppression in a signal
11/09/2000WO2000067389A1 Method of forming channel estimate, and receiver
11/09/2000WO2000028341A3 Dynamic register with low clock rate testing capability
11/09/2000DE19919901A1 Signalübertragungsschaltung Signal transmission circuit
11/08/2000EP1050988A1 Communication device and method
11/08/2000EP1050982A1 Optical coupler and circuit employing an optical coupler
11/08/2000EP1050975A1 Transmission network and filter therefor
11/08/2000EP1050974A2 A data communication device
11/08/2000EP1050164A1 Catv power inserter
11/08/2000EP1050159A1 Vsb receiver
11/08/2000CN1272982A Idle signals and echo cancellation
11/08/2000CN1272727A High-speed upstream modem communication
11/07/2000US6144643 Technique for discriminating presence of talking path in lattice communication network control system
11/07/2000US6144488 Optically amplifying device with gain equalizing function
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