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7561637 Determination of a channel estimate of a transmission channel  
A method of determining a channel estimate of a first transmission channel in a communications system. The method comprises deriving a first set of channel estimates from symbols received through...
7555006 Method and system for adaptive transcoding and transrating in a video network  
A video server adaptively selects an appropriate video encoding standard and an appropriate video encoding rate for encoding video content to be downloaded to one or more video client devices over...
7512083 Single chip multi-antenna wireless data processor  
A single chip integrated circuit wireless data processor demodulates N separate data signals from M separate antennas simultaneously. The multi-antenna processor can be coupled to a baseband...
7415499 Method and apparatus for listening for incoming calls on multiple port/socket combinations  
In one embodiment, the invention provides a method comprising loading a set of transport components into a memory; initializing each transport component of the set of transport components to listen...
7397772 Method and apparatus for acoustic echo cancellation in a communication system providing TTY/TDD service  
A method and apparatus are disclosed for canceling acoustic echo generated during transmission of text information in a communication system supporting a TTY/TDD service. When a mobile-to-land call...
7174192 Method for controlling a hands free system, radio apparatus, and hands free apparatus  
A radio apparatus, to be used as a first ending node of a communication network, is connectable to a hands-free apparatus by a local radio link to form a hands-free system. A call made on the...
7068780 Hybrid echo canceller  
Systems and methods for reducing transmit echo in a transceiver are disclosed. A hybrid echo canceller includes a limited tap length FIR filter to cancel short-term echo, while an interpolated...
6859772 Mixed signal dynamical environment modeling  
A device ( 2 ) and method ( 20 ) for providing a balanced parameterized description of a dynamical environment having a plurality of signal sources. The method ( 20 ) includes inverse transforming...
6515390 Electric drive apparatus with a rotor having two magnetizied disks  
The invention refers to magnetoelectric machines. It can be used when manufacturing different-purpose electric drives—for instance, in fans, compressors, electromobile's wheels, and so forth. It...
6466550 Distributed conferencing system utilizing data networks  
A distributed packet-based audio conferencing system, method for packet-based audio conferencing, and a transceiver for use in such conferencing are disclosed. The system uses a collection of...
6400760 Apparatus and method for an error signal compression technique in a fast adaptive equalizer circuit  
In a transceiver unit including an adaptive equalizer filter unit, apparatus is provided for reducing or compressing the number of bits representing an error signal. The apparatus replaces a...
6046518 Axial gap electrical machine  
An axial gap electrical machine employs a coil assembly embedded in epoxy and coated with a rubbery substance having different degrees of hardness. Two magnet assemblies straddle a central coil...
5724416 Normalization of calling party sound levels on a conference bridge  
A conference call sound level balancing method and system for selectively muting a conferee whose sound environment is loud enough to dominate other conferees of a conference call. The method is...
5666407 Software-based bridging system for full duplex audio telephone conferencing  
A software-implemented bridging routine is provided for a full duplex audio telephone system comprising units A, B and C. of which only unit A need have at least two lines and be full duplex. Unit...
5452298 Digital conference trunk system  
A low cost digital conference trunk system of the simple construction with a smaller volume, which uses a single memory both as a memory for holding input highway data and a memory for holding...
5390177 Conferencing arrangement for compressed information signals  
A conferencing bridging technique for compressed information signals which monitors the signal energy transmitted by each conferee. When there is only one conferee speaking, the summing circuit in...
5379280 Conferencing system for distributed switching network  
A conferencing device and method among terminals in a distributed digital telephone switching system is provided. The telephone switching system has a plurality of switching elements for...
5054021 Circuit for nulling the talker's speech in a conference call and method thereof  
A method and circuit for nulling each talker's speech in a conference call having a plurality of parties who are selectively talkers and listeners. The parties are interconnected on PCM telephone...
5034947 Whisper circuit for a conference call bridge including talker nulling and method therefor  
A circuit enabling whisper conferencing between two whisper conferees in a conference call. The conference call may contain any number of parties including the two whisper conferees and is...
4907221 Apparatus for attenuating the echo signal in telephone fork circuits for telephone conference calls  
A method of attenuating the echo signal in so-called telephone fork converting circuits, adapted for telephone conferences with a plurality of participants, consists of switching and arranging...
4809262 Method of making conference call connections in computer-controlled digital telephone exchanges  
A method of making conference call connections in computer-controlled telephone exchanges includes combining voice signals of conference participants on a digital basis, forming a signal of a total...
4797876 Conferencing bridge  
A conferencing bridge is provided for an electronic telephone system to support telephone conversations involving three or more parties. The conferencing bridge implements a conferencing algorithm...
4794591 Digital voice switch for a multi-port conference circuit  
An echo cancellation arrangement is provided for decreasing the "singing" of a connection of a large number of telephone subscribers in a conference calling arrangement. This arrangement includes a...
4754258 Integrated digital circuit for processing speech signal  
In an integrated circuit for transcoder, a substractor generates a signal representing a difference between an input speech signal and a prediction signal. This signal is transferred to a...
4677610 Three-port conference circuit for use in a digital telephone system  
A three-port conference circuit for use in a pulse code modulated communication system including a first speaker register including an input connected to a telephone system information memory...
4635252 Conference circuit for digital communication systems  
A circuit arrangement for conference circuits in digital communications systems, particularly in PCM telephone systems, provide digitized voice signals of the conference participants which are...
4608693 Fault detection arrangement for a digital conferencing system  
The disclosure relates to error/fault detection in signal processing systems such as those employed in a time division multiplex conferencer. The digital message samples (of the conferees) and the...
4575845 Time division multiplex conferencer  
A time division multiplex conferencer for continuously summing and outputting digital message samples received from n subscribers in n respective time slots. Message samples collected from each...
4535445 Conferencing system adaptive signal conditioner  
The disclosed arrangement of digital signal processor and echo cancellor is connectable to four wire transmission facilities on a per port basis for providing adaptive signal conditioning to reduce...
4509166 PCM Communication system and method of operation  
Process and circuit for carrying out said process for control of the transmission of PCM signals between subscriber stations of a PCM time-division multiplex communication network in a conference...
4485469 Time slot interchanger  
A programmed controlled signal processor operating as a time slot interchanger and having improved conferencing facilities is disclosed. A conference accumulator RAM is used that has a memory...
4477897 Linear time division multiplexed conferencer  
There is disclosed a linear time division multiplexed time slot conferencer in which a summation of incoming message samples respective to a group of time slots are stored in a summation memory...
4393496 Method for feeding call progress tones into conference connections  
In addition to the overall sum code words, call progress tone sum code words are formed which, in addition to the conference parts, respectively include a different PCM word corresponding to a call...
4300231 Digital system error correction arrangement  
There is disclosed an arrangement for removing error signals from a digital loop. A binary subtraction circuit is inserted in the loop and all signals passing through the circuit are reduced by a...
4289932 Conferencing communications system  
A telephone conferencing system in which all input signals are twice applied to a circulating signal loop firstly in real time and secondly delayed by an interval equal to the delay of the...
4288871 Digital loop conferencing signal correction arrangement  
There is disclosed an arrangement for removing error signals on a loop conferencing system. A decay circuit is inserted in the conference loop and all signals passing through the decay circuit are...
4229814 Multiplex conference bridge  
A conferencing circuit for use in a digitized speech, time division multiplex (TDM) loop communication system. Digitized speech samples from subscriber stations are extracted from the TDM loop and...
4203005 Digital type telephone system having a conference function  
This digital telephone conference system provides improved cancellation of reflective signals which cause echo-singing problems, such as caused by hydrid mismatches, for any number of telephone...
4190742 Process and apparatus for producing conference connections in a PCM time multiplex switching system  
In a PCM time multiplex switching system total code words are formed from individual PCM words supplied by the conference parties. In the process, intermediately constructed sum code words are...
4163871 Digital CVSD telephone conference circuit  
A six-telephone channel conference system features an all-digital CVSD (continuously variable slope delta modulation) conference bridge-like circuit. The delta modulation pulse train in each...
4162376 Conference call circuit using reversible analog to digital converter  
A circuit arrangement is disclosed for individual subscribers in a telecommunication set up. The circuit arrangement converts analog signals into digital signals and digital signals into analog...
4153817 Digital conference circuit  
A digital conference circuit provides greater stability in voice transmission by selectively inverting the signal in alternate conference channels, thereby providing cancellation of parasitic echo...
RE29991 Adaptable time division switch  
A switching network is disclosed that is capable of handling analog, PCM and CVSD signals connected to said network via loops or trunks. All signals are converted into CVSD format, synchronized to...
4109111 Method and apparatus for establishing conference calls in a time division multiplex pulse code modulation switching system  
A pulse code modulation, time division multiplex conferencing system for providing to each party channel a signal indicative of the linear sum of the samples from all other party-channels, such...
4076966 Method of and system for handling conference calls in digital telephone exchange  
A telephone exchange linked via PCM channels with subscribers engaged in a conference call includes switching circuits for transmitting to each participating subscriber, during an assigned time...
4059735 Digital conference system  
Conference conversations are provided among selected groups of stations in a communications system. Each of a plurality of stations generates speaker signals and conference control signals and...
4054757 Conference circuit using PCM techniques  
Conference circuit which uses a read/write memory divided into groups of memory lines, with each group corresponding to a conference. Each line is assigned to store data from a single subscriber...
4049921 Method for forming a conference connection in a time division multiplex telecommunication switching system  
A method for connecting subscribers to form a conference call in a time division multiplex (TDM) telecommunication switching system having a TDM ring-like circuit running from subscriber to...
4048449 Method for forming a conference connection in a telecommunication switching system  
A method is described for connecting at least three subscribers in, e.g., a conference call in time division multiplex (TDM) pulse code modulation (PCM) telecommunication switching systems. In each...
3551600 HIGH CAPACITY,HIGH SIDE-TONE SUPPRESSION,4-WIRE CONFERENCE CIRCUIT  
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