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2017

19609141Loudspeaker localization with a microphone array
29607627Sound enhancement through deverberation
39598070Infotainment system control
49596541Post-filter for handling resonance-induced echo components
59595998Sampling point adjustment apparatus and method and program
69589556Energy adjustment of acoustic echo replica signal for speech enhancement
79558758User feedback on microphone placement
89554210Multichannel acoustic echo cancellation with unique individual channel estimations
99553634Electrical duplex to optical conversion
109552828Audio signal processing device
119552827Echo control through hidden audio signals
129548063Method and apparatus for acoustic echo control
139544076Method and system for tunable upstream bandwidth utilizing an integrated multiplexing device
149542957Procedure and mechanism for controlling and using voice communication
159538297Enhancement of reverberant speech by binary mask estimation
169538283Ear microphone

2016

179530419Encoding of stereophonic signals
189520137Method for suppressing the late reverberation of an audio signal
199516410Asynchronous clock frequency domain acoustic echo canceller
209516409Echo cancellation and control for microphone beam patterns
219514763Noise reduction via tuned acoustic echo cancellation
229509854Echo cancellation
239503812Systems and methods for split echo cancellation
249497544Systems and methods for surround sound echo reduction
259497330Signal processing method, signal processing device, and signal processing program
269497025Ethernet interface module
279491561Acoustic echo cancellation with internal upmixing
289485596Utilizing a smartphone during a public address system session
299484983Impedance adjustment method, delay capacitance adjustment method and associated apparatus for communication device
309484011Echo modulation methods and system
319479368Method and apparatus for adjusting pre-distortion coefficient
329473204Full-duplex transceiver circuit and method thereof
339472203Clock synchronization for multichannel system
349467571Echo removal
359454975Voice trigger
369451078Universal reconfigurable echo cancellation system
379443530Acoustic echo cancellation
389443528Method and device for eliminating echoes
399438992Multi-microphone robust noise suppression
409437210Audio signal processing
419431013Co-talker nulling for automatic speech recognition systems
429420370Audio processing device and audio processing method
439414158Single-channel, binaural and multi-channel dereverberation
449414157Method and device for reducing voice reverberation based on double microphones
459413434Cancellation of interfering audio on a mobile device
469413422Communication system and method for cancelling timing dependence of signals
479407410Method and apparatus for signaling to a mobile device with set of training sequence codes to use for a communication link
489386373System and method for estimating a reverberation time
499385779Acoustic echo control for automated speaker tracking systems
509378754Adaptive spatial classifier for multi-microphone systems
519362980Genetically-engineered microbial oil dielectric fluid
529361874Varying adaptive filter step size in acoustic echo cancellation
539352701Managing telephony and entertainment audio in a vehicle audio platform
549351091Apparatus with adaptive microphone configuration based on surface proximity, surface type and motion
559349363Audio signal processing system and echo signal removing method thereof
569343078Pre-process (amplitude distortion) and post-process (phase synchronization) for linear AEC system
579325855Echo elimination device and method for miniature hands-free voice communication system
589319791Reduced-delay subband signal processing system and method
599319783Attenuation of output audio based on residual echo
609319532Acoustic echo cancellation for audio system with bring your own devices (BYOD)
619319362Messaging system with distributed filtering modules which register interests, remove any messages that do not match the registered interest, and forward any matched messages for delivery
629312912Signal transmitting and receiving circuit of digital subscriber line
639312586System and method for reducing effects of switched capacitor kickback noise
649307318Audio processor circuits for acoustic echo cancellation and method therefor
659294860Identifying directions of acoustically reflective surfaces
669294858Controlling acoustic echo cancellation while handling a wireless microphone
679288576Dereverberation parameter estimation device and method, dereverberation/echo-cancellation parameter estimation device, dereverberation device, dereverberation/echo-cancellation device, and dereverberation device online conferencing system
689286883Acoustic echo cancellation and automatic speech recognition with random noise
699282023Resistance arranging system and method based on RS-485 network
709280986Acoustic signal processing device and acoustic signal processing method
719277059Echo removal
729270590Method, apparatus and system for transmitting packets in virtual network with respect to a virtual machine (VM) migration
739264807Multichannel acoustic echo reduction
749264553Methods and apparatuses for echo cancelation with beamforming microphone arrays
759258790Dynamic power spectrum management method, spectrum optimization system and client device
769246545Adaptive estimation of delay in audio systems
779246543Smart audio and video capture systems for data processing systems
789241214Direct sound extraction device and reverberant sound extraction device
799237241Voice packet dynamic echo cancellation system

2015

809225492Cyclic prefix based opportunistic transmission/reception scheme for interference cancelation
819219456Correcting clock drift via embedded sin waves
829215328Beamforming apparatus and method based on long-term properties of sources of undesired noise affecting voice quality
839215327Methods and apparatuses for multi-channel acoustic echo cancelation
849210507Microphone hiss mitigation
859210504Processing audio signals
869210502Echo cancelling device
879203972Efficient audio signal processing in the sub-band regime
889185506Comfort noise generation based on noise estimation
899185233Audio communication device and method using fixed echo cancellation filter coefficients
909184791Selective adaptive audio cancellation algorithm configuration
919179217Signal processing apparatus and signal processing method
929160404Reverberation reduction device and reverberation reduction method
939148724Audio system signal processing control using microphone movement information
949148352Method and system for dynamic repurposing of payload storage as a trace buffer
959148200Determining power over ethernet impairment
969143186Transceiver and communication device
979136905Multi-receiving terminal echo cancellation method and system
989130747Software radio frequency canceller
999129594Signal processing apparatus and signal processing method
1009111544Mono and multi-channel echo compensation from selective output
1019100466Method for processing an audio signal and audio receiving circuit
1029093077Reverberation suppression device, reverberation suppression method, and computer-readable storage medium storing a reverberation suppression program
1039083427Transceiver and communication method of digital subscriber line
1049077529Method and apparatus for reducing nonlinear echo distortion in a communication device
1059076426Training an echo canceller in severe noise
1069071328Transceiver with automatic detection of unshielded twisted pair or shielded twisted pair cabling
1079065895Non-linear echo cancellation
1089060052Single channel, binaural and multi-channel dereverberation
1099049281Nonlinear echo suppression
1109047862Audio signal processing method, audio apparatus therefor, and electronic apparatus therefor
1119042567Acoustic echo cancellation system
1129042566Wideband acoustic echo cancellation apparatus with adaptive tail length in embedded system, and wideband acoustic echo cancellation method
1139036829Adaptive notch filter with variable bandwidth, and method and apparatus for canceling howling by using the adaptive notch filter with variable bandwidth
1149036826Echo cancellation using closed-form solutions
1159036825Audio signal correction and calibration for a room environment
1169025529Communication terminal, communication device, method for data communication, and method for frequency allocation
1179020163Near-field null and beamforming
1189008326Method for testing echo cancellers
1199002024Reverberation suppressing apparatus and reverberation suppressing method
1209001713Communication apparatus and communication method, computer program, and communication system
1218989063Time division multiple access far end crosstalk channel estimation
1228983085Method and apparatus for reducing noise pumping due to noise suppression and echo control interaction
1238982745Method for improving the data rate of mobile/handheld data and the quality of channel estimation in an ATSC-M/H transport data stream
1248982744Method and system for a subband acoustic echo canceller with integrated voice activity detection
1258964967Subband domain echo masking for improved duplexity of spectral domain echo suppressors
1268964608Interference cancellation for division free duplexing or full duplex operation
1278958571MIC covering detection in personal audio devices
1288953506Time multiplexing for coexistence within multiple communication systems
1298942382Dynamic beamformer processing for acoustic echo cancellation in systems with high acoustic coupling
1308934945Voice switching for voice communication on computers
1318929263Echo mitigation in the presence of variable delays due to adaptive jitter buffers

2014

1328917639Eliminating false audio associated with VoIP communications
1338897182Apparatus and method for transmitting muting information, and apparatus and method for acquiring channel state using same
1348880017Active resistive summer for a transformer hybrid
1358879438Resource efficient acoustic echo cancellation in IP networks
1368879432Splitter and combiner for multiple data rate communication system
1378873764Acoustic echo suppression unit and conferencing front-end
1388873740Enhanced echo cancellation
1398867755Sound source separation apparatus and sound source separation method
1408855327Sound emission and collection device and sound emission and collection method
1418855326Microphone system and method of operating the same
1428848934Controlling audio signals
1438848933Signal enhancement device, method thereof, program, and recording medium
1448830848Adjusting a control channel timer in a wireless communication
1458830812Optimizing precoder settings using average SINR reports for groups of tones
1468824667Time-domain acoustic echo control
1478811624Echo cancellation method and device
1488811623Information processing apparatus and program
1498811602Full duplex speakerphone design using acoustically compensated speaker distortion
1508804977Nonlinear reference signal processing for echo suppression
1518804730Layer-2 extension services
1528804583System and method for medium access control enabling both full-duplex and half-duplex communications
1538798992Audio noise modification for event broadcasting
1548792649Echo canceller used for voice communication
1558787218Dynamic establishment of virtual circuits multisegment pseudowires
1568780686Reduced memory vectored DSL
1578767595Enhanced methods of cellular environment detection when interoperating with timed interfers
1588761410Systems and methods for multi-channel dereverberation
1598751029System for extraction of reverberant content of an audio signal
1608750308Communication method and server of transmission control protocol
1618750174Dual carrier separation
1628737278Full duplex wire-line transceiver with echo cancellation line driver
1638731207Apparatus and method for computing control information for an echo suppression filter and apparatus and method for computing a delay value
1648730852Eliminating false audio associated with VoIP communications
1658724823Method and apparatus for reducing noise pumping due to noise suppression and echo control interaction
1668724822Noisy environment communication enhancement system
1678718273Apparatus for processing echo signal and method thereof
1688717863Method and apparatus for vectored data transmission
1698712068Acoustic echo cancellation
1708711741Method and apparatus for networked modems
1718705759Method for determining a signal component for reducing noise in an input signal
1728705758Audio processing device and method for reducing echo from a second signal in a first signal
1738699625Generalized OFDM (GOFDM) for ultra-high-speed serial optical transport networks
1748693698Method and apparatus to reduce non-linear distortion in mobile computing devices
1758693677Techniques for updating filter coefficients of an adaptive filter
1768681999Entrainment avoidance with an auto regressive filter
1778681665Transceiver filter and tuning
1788675883Apparatus and associated methodology for suppressing an acoustic echo
1798654689Advanced signal processors for interference cancellation in baseband receivers
1808644496Echo suppressor, echo suppressing method, and computer readable storage medium
1818644495Echo canceler
1828644494Echo canceler
1838634569Systems and methods for echo cancellation and echo suppression
1848630211Hybrid radio architecture for repeaters using RF cancellation reference

2013

1858606573Voice recognition improved accuracy in mobile environments
1868606249Methods and systems for enhancing audio quality during teleconferencing
1878605566Method and system for signal emulation
1888600038System and method for echo cancellation
1898584170System and method of internet group management for multicast push in passive access networks
1908582781Echo modulation methods and systems
1918582443Method and apparatus for virtual cable test using echo canceller coefficients
1928571030System and method for computing cost metrics for wireless network links
1938565127Voice-activity detection based on far-end and near-end statistics
1948553898Method and system for reducing acoustical reverberations in an at least partially enclosed space
1958538035Multi-microphone robust noise suppression
1968538034Method and arrangement for echo cancellation of voice signals
1978537728Communication apparatus with echo cancellation and method thereof
1988532306Method and an apparatus of decoding an audio signal
1998526340Selectively adaptable far-end echo cancellation in a packet voice system
2008526339Echo cancellation circuit
2018521530System and method for enhancing a monaural audio signal
2028515086Method and system for clock drift compensation
2038515055Adaptive filtering with flexible selection of algorithm complexity and performance
2048514753Data format and data transfer
2058509450Dynamic audibility enhancement
2068509126Method and system for utilizing a reserved and/or out of band channel for maintaining a network connection
2078509125Method and apparatus for reducing nonlinear echo distortion in a communication device
2088503961Active resistive summer for a transformer hybrid
2098503669Integrated latency detection and echo cancellation
2108498429Acoustic correction apparatus, audio output apparatus, and acoustic correction method
2118498423Device for and a method of processing audio signals
2128483398Methods and systems for reducing acoustic echoes in multichannel communication systems by reducing the dimensionality of the space of impulse responses
2138472616Self calibration of envelope-based acoustic echo cancellation
2148467544Filter coefficient setting device and echo prevention device
2158467538Dereverberation apparatus, dereverberation method, dereverberation program, and recording medium
2168462962Sound processor, sound processing method and recording medium storing sound processing program
2178462958Apparatus and method for computing filter coefficients for echo suppression
2188462783Method and a node device for transferring a message based on traffic engineering tunnels
2198462675Echo mitigation in the presence of variable delays due to adaptive jitter buffers
2208441912Method and apparatus for data transmission
2218437272Distinguishing between connectivity verification availability and forwarding protocol functionality in a computer network
2228433074Echo suppressing method and apparatus
2238422688Method and an apparatus of decoding an audio signal
2248422663Structure and method for echo reduction without loss of information
2258422412Duplexer and switch enhancement
2268416719Generating an estimated non-linear echo signal
2278411871Echo cancellation
2288411847Acoustic echo canceller
2298411603Method and system for dual digital microphone processing in an audio CODEC
2308406430Simulated background noise enabled echo canceller
2318401203Information processing apparatus and program
2328391505Reverberation suppressing apparatus and reverberation suppressing method
2338391504Method and system for artificial reverberation employing dispersive delays
2348391191System and method for the application on an LMS method to updating an echo canceller in an ADSL modem
2358385557Multichannel acoustic echo reduction
2368384759Video conferencing apparatus and method for configuring a communication session
2378380253Voice switching for voice communication on computers
2388374355Robust and efficient frequency-domain decorrelation method
2398369251Timestamp quality assessment for assuring acoustic echo canceller operability
2408355511System and method for envelope-based acoustic echo cancellation
2418345583Method for enhancing ethernet channel impairment and apparatus using the same

2012

2428335319Double talk detection method based on spectral acoustic properties
2438325909Acoustic echo suppression
2448325635Systems and methods for facsimile echo cancellation
2458320577Method and apparatus for multi-channel audio processing using single-channel components
2468320575Efficient audio signal processing in the sub-band regime
2478320574Methods and systems for reducing acoustic echoes in communication systems
2488320553Enhanced echo cancellation
2498320552Delay estimator
2508311234Echo canceller and communication audio processing apparatus
2518310937Voice packet dynamic echo cancellation system
2528295501Method for testing echo cancellers
2538295474Echo canceller with heavy double-talk estimation
2548295214Reducing transmit signal components of a receive signal of a transceiver
2558290170Method and apparatus for speech dereverberation based on probabilistic models of source and room acoustics
2568290143Delay estimator
2578284949Multi-channel acoustic echo cancellation system and method
2588284948Engine sound processing apparatus
2598284947Reverberation estimation and suppression system
2608279783Linear-equivalent echo and next cancellers for Tomlinson-Harashima Precoding (THP) systems
2618275142Acoustic echo cancellation system
2628275139Linear full duplex system and method for acoustic echo cancellation
2638271277Dereverberation apparatus, dereverberation method, dereverberation program, and recording medium
2648270323Apparatus for, and method of, reducing noise in a communications system
2658265290Dereverberation system and dereverberation method
2668265289Method and system for clear signal capture
2678265263Delayed adaptation structure for improved double-talk immunity in echo cancellation devices
2688259629System and method for transmitting and receiving wideband speech signals with a synthesized signal
2698255967Method and apparatus for high speed data services
2708254588System and method for providing step size control for subband affine projection filters for echo cancellation applications
2718248974All-digital timing control for multi-channel full-duplex transceiver
2728243635Information processing apparatus
2738233632Method and apparatus for multi-channel audio processing using single-channel components
2748223960Apparatus and method for removing an echo signal in a signal transmission/reception apparatus of a communication system
2758223959Echo cancellation in which sound source signals are spatially distributed to all speaker devices
2768218780Methods and systems for blind dereverberation
2778208623Echo processing method and device
2788203975Adaptive analog echo/NEXT cancellation
2798199927Conferencing system implementing echo cancellation and push-to-talk microphone detection using two-stage frequency filter
2808199922Ethernet isolator for microphonics security and method thereof
2818199921Sound field controlling device
2828184818Double-talk detector with accuracy and speed of detection improved and a method therefor
2838179781Method and apparatus for encoding data for transmission in a communication system
2848170224Wideband speakerphone
2858170199Echo canceller
2868165310Dereverberation and feedback compensation system
2878155303System and method for cancelling echo
2888150052Integrating acoustic echo cancellation as a subsystem into an existing videoconference and telepresence system
2898135058Adaptive known signal canceller
2908130969Multi-channel echo compensation system
2918130941Echo canceler
2928126078Method and apparatus for reducing noise in an unbalanced channel using common mode component
2938125934System and method for synchronization signal detection and recovery from false triggers
2948121062Method and apparatus for cross-talk cancellation in frequency division multiplexed transmission systems
2958116471Audio signal dereverberation
2968116240Bi-directional bridge circuit having high common mode rejection and high input sensitivity
2978111637Method, arrangement and device for precompensation of crosstalk in a DSL MIMO system
2988103011Signal detection using multiple detectors

2011

2998085947Multi-channel echo compensation system
3008077643Systems and methods for synchronizing audio signals of a communication device
3018077642Methods and apparatus for signal echo cancellation and transmitter calibration in full duplex systems
3028077641Echo cancellation for channels with unknown time-varying gain
3038073147Dereverberation method, apparatus, and program for dereverberation
3048073133Echo canceler and echo canceling method
3058059826Efficient and scalable parametric stereo coding for low bitrate audio coding applications
3068050645Active resistive summer for a transformer hybrid
3078045946Active resistive summer for a transformer hybrid
3088045492Dynamic establishment of virtual circuits using multi-segment pseudowires
3098045491Signal handling for wireless clients
3108041844Autodetection of a PCI express device operating at a wireless RF mitigation frequency
3118041046Reverberation adjusting apparatus, reverberation adjusting method, reverberation adjusting program, recording medium on which the reverberation adjusting program is recorded, and sound field correcting system
3128027279Echo cancellation
3138023662Reverberation adjusting apparatus, reverberation correcting method, and sound reproducing system
3148023438Analog signal path modeling for self-interference cancellation
3158014879Methods and systems for adaptive control
3168005023Client-side echo cancellation for multi-party audio conferencing
3178000274Versatile system for transceiver noise reduction in a time-division duplexing wireless network
3187983293External signal supply unit, vehicle state acquisition system and external signal supply method
3197945656Method for determining round trip times for devices with ICMP echo disable
3207929469Method and hybrid circuit for attenuating near-end crosstalk in a bidirectional signal transmission
3217920599Methods and systems for synchronizing wireless transmission of data packets
3227920492Devices, softwares and methods for redundantly encoding a data stream for network transmission with adjustable redundant-coding delay
3237920491System and method for split isolation in radio frequency electronics
3247899195Adaptive howling canceller
3257898992Network apparatus with shared coefficient update processor and method thereof
3267876909Efficient filter for artificial ambience
3277876718Echo reduction
3287864718Echo cancellation device for full duplex communication systems

2010

3297856353Method for processing speech signal data with reverberation filtering
3307852792Packet based echo cancellation and suppression
3317844059Dereverberation of multi-channel audio streams
3327843859Analog echo canceller with filter banks
3337843858Crosstalk masking for digital subscriber loops
3347835311Voice-activity detection based on far-end and near-end statistics
3357826333Optical recording medium
3367812693Lowpass-bandstop common mode filter for differential lines carrying high rate digital signals
3377808993Bidirectional multicast protocol with upstream and downstream join messages
3387808937Variable interference cancellation technology for CDMA systems
3397808936Systems and methods for facsimile echo cancellation
3407804916Detector for detecting a frequency-shift keying signal by digital processing
3417804828Communication method between communication networks
3427804760Method and system for signal emulation
3437796767Howling detection method, device, and acoustic device using the same
3447787635Dip filter frequency characteristic decision method
3457787460System and method for switching packet traffic over an optical transport network
3467787459Method and system for implementing traversal through network address translation
3477778210Bridge circuit to suppress echoes in communication devices
3487778209Passive echo cancellation device and signal transmission method thereof
3497769186System and method facilitating acoustic echo cancellation convergence detection
3507764799Audio system providing for filter coefficient copying
3517764634Suppression of acoustic feedback in voice communications
3527761076Apparatus and method for converting single-ended signals to a differential signal, and transceiver employing same
3537760887Updating modeling information based on online data gathering
3547760673Selectively adaptable far-end echo cancellation in a packet voice system
3557760672Method and device for the echo compensation of a reception signal
3567751465Cancellation of pilot and traffic signals
3577747240Method of charging in a communications network
3587742607Method for designing a modal equalizer for a low frequency sound reproduction
3597742386Multiple channel interference cancellation
3607738567Baseline wander correction for communication receivers
3617733770Congestion control in a network
3627724693Network dependent signal processing
3637720236Updating modeling information based on offline calibration experiments
3647720232Speakerphone
3657720015Receiver ADC clock delay base on echo signals
3667706546Computer-based onboard noise suppression devices with remote web-based management features
3677697696Audio amplification apparatus with howling canceler
3687697462System and method for split isolation in radio frequency electronics
3697693291Multi-channel frequency-domain adaptive filter method and apparatus
3707684578Wave field synthesis apparatus and method of driving an array of loudspeakers
3717672446Echo processing method and device
3727668122Communication apparatus using a transmission medium and method for the same
3737660425Acoustic echo cancellation
3747656827Apparatus for, and method of, reducing noise in a communications system
3757649856System and method for transmitting and receiving wideband speech signals

2009

3767627348Point to multipoint device for communication with a plurality of telecommunications units
3777623519Rule based routing in a switch
3787606547Active resistance summer for a transformer hybrid
3797606183Devices, softwares and methods with improved performance of acoustic echo canceller in VoIP communication
3807599432Method and apparatus for dynamically inserting gain in an adaptive filter system
3817599316Bi-directional bridge circuit having high common mode rejection and high input sensitivity
3827590077Canceller device and data transmission system
3837583768Apparatus for canceling intersymbol interference in semiconductor memory device and method thereof
3847583621Method and apparatus for suppressing echo cancelling in a packet switched network
3857574005Howling frequency component emphasis method and apparatus
3867570608Echo canceller disabler for modulated data signals
3877567759Optical apparatus
3887558729Music detection for enhancing echo cancellation and speech coding
3897558224Management of packet-based audio devices within acoustic spaces
3907554933Echo cancellation device for full duplex communication systems
3917551616Forwarding packets to aggregated links using distributed ingress card processing
3927536162Active resistive summer for a transformer hybrid
3937535859Voice activity detection with adaptive noise floor tracking
3947502338De-emphasis training on a point-to-point connection
3957502337Intelligent voice network monitoring using echo cancellation statistics
3967502336Multi-carrier communication using adaptive tone-pruning
3977483420DSP circuitry for supporting multi-channel applications by selectively shifting data through registers
3987480262Telephone terminal, telephone system using telephone terminal and control method of telephone terminal

2008

3997468957Canceller circuit and controlling method
4007466971Active resistive summer for a transformer hybrid
4017460499Modulation noise estimation mechanism
4027460498System and method for detecting anomalies along telecommunication lines
4037457353Method and system for mitigating Fourier transform side lobes
4047457258Tunable filter to facilitate communications
4057450528Method and apparatus for performing echo suppression
4067443812Voice and data exchange over a packet based network with AGC
4077443810Wireless terminals
4087436787Transceiver for full duplex communication systems
4097433665Apparatus and method for converting single-ended signals to a differential signal, and transceiver employing same
4107420937Selectively adaptable far-end echo cancellation in a packet voice system
4117408891Echo canceller employing H-register and storage register
4127397772Method and apparatus for acoustic echo cancellation in a communication system providing TTY/TDD service
4137392520Method and apparatus for upgrading software in network bridges
4147379431Error correction method and apparatus for TTY on VoIP transmissions
4157369516Adaptive echo canceling
4167366161Full duplex voice path capture buffer with time stamp
4177366118Echo cancellation
4187362719Method and apparatus for cross-talk cancellation in frequency division multiplexed transmission systems
4197355989Echo canceling method and device for multiplex line
4207352687Mixed domain cancellation
4217349353Techniques to reduce echo
4227346014System and method for echo cancellation
4237346013Frequency domain equalization of communication signals
4247346012Transceiver with accelerated echo canceller convergence
4257333448Full duplex transceiver
4267333447Packet voice system with far-end echo cancellation
4277327995Active resistance summer for a transformer hybrid
4287324490Communication system, address management method, relay device, and management device
4297324467Bridge circuit to suppress echoes in communication devices
4307324466Echo canceling system and echo canceling method
4317321568Realtime management of processing resources

2007

4327310425Multi-channel frequency-domain adaptive filter method and apparatus
4337308494Reprovisioning technique for an interconnect fabric design
4347304962Delay measurement system in a packet network
4357304961Echo cancellation device for full duplex communication systems
4367298711Echo cancellation in a communication device
4377292564Method and apparatus for use in real-time, interactive radio communications
4387286674Method for designing a modal equalizer for a low frequency audible range especially for closely positioned modes
4397286496IP network communication device with facsimile communication function
4407280493Method for hardware reduction in echo canceller and near-end crosstalk canceller
4417277403Duplexer with a differential receiver port implemented using acoustic resonator elements
4427269211Residual echo reduction for a full duplex transceiver
4437266092Adaptive frequency duplexing system and method
4447263074Voice activity detection based on far-end and near-end statistics
4457254116Method and apparatus for transceiver noise reduction in a frame-based communications network
4467242684Architecture for switching packets in a high-speed switching environment
4477237020Integer programming technique for verifying and reprovisioning an interconnect fabric design
4487236463Transceiver for echo and near-end crosstalk cancellation without loop timing configuration
4497230954Cross link intra-vehicular data communication using a field coupled transmission line
4507227883Method and apparatus for domain transformation multiple signal processing
4517221659Method and system for managing erroneous attenuation of signal
4527212502Method and apparatus for dynamically adapting telephony analog loss based on channel content
4537197146Microphone array signal enhancement
4547187719Method and system for data rate optimization in a digital communication system
4557184416Techniques to cancel echo tail
4567171246Noise suppression
4577171004Room acoustics echo meter for voice terminals
4587171003Robust and reliable acoustic echo and noise cancellation system for cabin communication
4597167568Microphone array signal enhancement
4607164659Adaptive gain control based on echo canceller performance information

2006

4617155018System and method facilitating acoustic echo cancellation convergence detection
4627154867Echo reduction
4637142533Echo canceller and compression operators cascaded in time division multiplex voice communication path of integrated access device for decreasing latency and processor overhead
4647142518Monitoring communications networks
4657136471Method and apparatus for detecting a secondary destination of a telephone call based on changes in the telephone signal path
4667133529Howling detecting and suppressing apparatus, method and computer program product
4677133442Rapid identification of transmission media channel characteristics
4687130428Picked-up-sound recording method and apparatus
4697130281Devices, softwares and methods with improved performance of acoustic echo canceler in VoIP communication
4707120130Seamless redundant echo canceller replacement in a multi-channel echo canceller
4717113491Method and system for varying an echo canceller filter length based on data rate
4727106815Ingress noise reduction in a digital receiver
4737103015DSL transmission system with means for ensuring local echo orthogonality
4747103014Systems and methods for improving sound quality in computer-network telephony application
4757099459Method and device for handling echo in a communication network
4767092365Voice and data exchange over a packet based network with AGC
4777088770Adaptive turbo decision feedback equalization method and device
4787085245Coefficient domain history storage of voice processing systems
4797082157Residual echo reduction for a full duplex transceiver
4807072310Echo canceling system
4817065056Transceiver circuit including an echo canceller
4827058315Fast decision threshold controller for burst-mode receiver
4837035415Method and device for acoustic echo cancellation combined with adaptive beamforming
4847031269Acoustic echo canceller
4857027562System and method to reduce echoes in voice communications
4867023812System and method for improving modem transmission through private branch exchanges, central offices, and other systems
4877020101Method of implementing a repeater, and a transceiver unit
4887020099Apparatus for, and method of, reducing noise in a communications system
4897016355Determination of the propagation delay in a packet switched network
4907013226Reflectometer with echo canceller
4917009945Dual-mode analog/digital adaptive echo cancellation in communication systems with asymmetric spectrum
4927006458Echo canceller disabler for modulated data signals
4937002931Power efficient line driver with high performance echo cancellation for 1000BASE-T
4947002930Method of optimal power distribution for communication systems
4957002897Multiple channel interference cancellation
4966990084Echo cancellation with dynamic latency adjustment
4976990083Method and device for computing echo-cancellation coefficients using FFT
4986987782Method and apparatus for detecting robbed bit location in PCM modems and the like

2005

4996968064Adaptive thresholds in acoustic echo canceller for use during double talk
5006963642Band-by-band full duplex communication
5016937056System and method for transmission-line termination by signal cancellation, and applications thereof
5026922403Acoustic echo control system and double talk control method thereof
5036917682Method and device for echo cancelling
5046865162Elimination of clipping associated with VAD-directed silence suppression
5056853626Method and apparatus for echo cancellation in an asymmetric communication system

2004

5066804349Hybrid transceiver circuit
5076799062Full-duplex hands-free transparency circuit and method therefor
5086735181Wireless transceiver with subtractive filter compensating both transmit and receive artifacts
5096714646Method and apparatus for echo suppression
5106687236Method for providing echo control devices in communication links to intelligent peripherals
5116678254Method and communication device for optimizing echo cancellation

2003

5126658107Methods and apparatus for providing echo suppression using frequency domain nonlinear processing
5136633945Fully connected cache coherent multiprocessing systems
5146597787Echo cancellation device for cancelling echos in a transceiver unit
5156556677Single-ended echo cancellation system and method
5166535604Voice-switching device and method for multiple receivers
5176532289Method and device for echo suppression

2002

5186469988Low-level circuit implementation of signal flow graphs for real-time signal processing of high-speed digital signals
5196466666Method and apparatus for echo estimation and suppression
5206418537Accurate timing calibration for each of multiple high-speed clocked receivers using a single DLL
5216415247System identification method and its recording device

2001

5226246716Information communication system
5236191663Echo reduction on bit-serial, multi-drop bus

2000

5246130943Method and apparatus for suppressing echo in telephony
5256088386Transmitter with phase rotor, modulator/demodulator, communication system and method performed thereby
5266044108System and method for suppressing far end echo of voice encoded speech
5276011846Methods and apparatus for echo suppression

1999

5285970154Apparatus and method for echo cancellation
5295943645Method and apparatus for computing measures of echo
5305893056Methods and apparatus for generating noise signals from speech signals
5315887059System and method for performing echo cancellation in a communications network employing a mixed mode LMS adaptive balance filter
5325857167Combined speech coder and echo canceler

1998

5335818945Subband echo cancellation method using projection algorithm
5345793755Echo suppressor for facsimile calls in a satellite network
5355784454Arrangement for communication with a subscriber
5365734987Noise-controlled communication apparatus
5375721730Spectral noise compensation for telecommunication signal processing

1997

5385606550Echo canceller and method for a voice network using low rate coding and digital speech interpolation transmission

1996

5395587998Method and apparatus for reducing residual far-end echo in voice communication networks
5405566167Subband echo canceler
5415561668Echo canceler with subband attenuation and noise injection control
5425517435Method of identifying an unknown system with a band-splitting adaptive filter and a device thereof
5435500880Transmission system comprising a sub-band echo canceller which includes a sub-band coding arrangement
5445487109End office of a telephone system with a zero loss plan

1995

5455394392Method for transferring information using modems
5465381475Arrangement for suppressing echoes in a digital portable telephone

1994

5475357609Site controller with echo suppression
5485317596Method and apparatus for echo cancellation with discrete multitone modulation

1992

5495136577Sub-band acoustic echo canceller

1991

5505022074Digital echo suppressor
5515016271Echo canceler-suppressor speakerphone
5525001701Subband echo canceler including real time allocation among the subbands
5534984265Device for forming the hands-free function in a telephone set, associating the gain switching and echo suppression functions

1990

5544979163Echo suppression arrangement for an adaptive speakerphone

1989

5554879745Half-duplex speakerphone
5564879738Digital telephony card for use in an operator system
5574864608Echo suppressor
5584831651Intermediate amplifier for use in two-wire connections of a dial telephone network and method for the gain control of said amplifier
5594823339Method and device for protecting modems against echoes

1988

5604782525Echo cancellation in two-wire transmission path repeaters
5614748665Analog echo suppressor
5624747132Howling canceller
5634741025Speech additive distribution equipment for conferencing system
5644726062Duplex hands-free communications circuit

1987

5654694450Method and apparatus for adaptive receiver squelch echo control
5664652703Digital voice transmission having improved echo suppression
5674644108Adaptive sub-band echo suppressor

1986

5684628156Canceller trained echo suppressor
5694623980Method of processing electrical signals by means of Fourier transformations
5704609788Digital voice transmission having improved echo suppression
5714607146Circuit arrangement for controlling the transmission capacity of the receiving branch of a transmission system
5724591670Echo canceller and echo suppressor for frequency divisional attenuation of acoustic echoes

1985

5734555596Loudspeaking telephones
5744546216Echo suppressor for improving echo canceler performance
5754507524Loudspeaker telephone system

1984

5764490582Speakerphone control circuit
5774469916Method and apparatus for detecting signalling and data signals on a telephone channel
5784435621Speech direction detection circuits for telephone communication devices

1983

5794394767Data transmission over long distance circuits
5804386242Impedance matching using active couplers
5814382164Signal stretcher for envelope generator
5824368360Adaptive control type echo suppressor

1982

5834363938Method of and apparatus for echo detection in voice channel signals
5844360713Echo detector particularly for speech interpolation communication systems
5854352962Tone responsive disabling circuit
5864351983Speech detector with variable threshold
5874349707System for measuring the attenuation on a transmission path

1981

5884288664Neutralization signal developing device for an echo suppressor
5894277645Multiple variable threshold speech detector
5904261051Time-division-multiplexed exchanger

1980

5914215252Video teleconference audio echo control unit
5924213014Half echo-suppressor for a four-wire telephone line
5934205202Method and means for improving the spectrum utilization of multichannel telephone systems
5944199729Variable peak detector
5954192979Apparatus for controlling echo in communication systems utilizing a voice-activated switch
5964181970Digital attenuator for compressed PCM signals

1979

5974177361Signaling tone transparent echo suppressor
5984175218Telephone switching system
5994167653Adaptive speech signal detector
6004166924Removing reverberative echo components in speech signals
6014165449Echo suppressor circuit
6024160873Level control circuitry for two way communication system
6034152657Echo suppression circuit

1978

6044130743Terminal equipment for a multiplex carrier current telephone system
6054123626Digital echo attenuation circuit for a telephone system
6064115668Echo suppressor with SF transmission and regeneration
6074088851Digital echo suppressor

1977

6084065646Power converter
6094053870Digital signal level comparison device
6104051332Multiplex digital echo suppression system
6114031338Echo suppressor using frequency-selective center clipping
6124029912Common control digital echo suppressor
6134028506Maximum value tracing circuit for digitized voice signals
6144027114Echo prevention circuit
6154012603Echo suppressor having self-adaptive means
6164008375Digital voice switch for single or multiple channel applications
6174005277Echo controller comprising a mode switch for switching echo suppressor and canceller
6184005276Digital voice signaling with digital echo detection and voice activity compression used to cancel echo
6194004101Method and device for detecting occupancy of telecommunication channels

1976

6203992594Echo suppressor break-in circuitry
6213991287Digital echo suppressor noise insertion
6223985979Half-echo suppressor for a terminal of a four-wire electric line
6233985956Method of and means for detecting voice frequencies in telephone system
6243979559Data modem having line verification and automatic disconnect features
6253975686Loss signal generation for delta-modulated signals
6263973086Digital echo suppressor break-in circuitry
6273942116Transceiver having improved voice actuated carrier and echo suppression circuit
6283937907Digital echo suppressor
6293935480Broad band directional signal generator
6303935403Device for developing a neutralization signal for an echo suppressor
© 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017