СПИСОК патентов США - подгруппа МПК16 H04B3/20
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| № п/п | Номер патента | Название патента | |||
2017 | |||||
| 1 | 9609141 | Loudspeaker localization with a microphone array | |||
| 2 | 9607627 | Sound enhancement through deverberation | |||
| 3 | 9598070 | Infotainment system control | |||
| 4 | 9596541 | Post-filter for handling resonance-induced echo components | |||
| 5 | 9595998 | Sampling point adjustment apparatus and method and program | |||
| 6 | 9589556 | Energy adjustment of acoustic echo replica signal for speech enhancement | |||
| 7 | 9558758 | User feedback on microphone placement | |||
| 8 | 9554210 | Multichannel acoustic echo cancellation with unique individual channel estimations | |||
| 9 | 9553634 | Electrical duplex to optical conversion | |||
| 10 | 9552828 | Audio signal processing device | |||
| 11 | 9552827 | Echo control through hidden audio signals | |||
| 12 | 9548063 | Method and apparatus for acoustic echo control | |||
| 13 | 9544076 | Method and system for tunable upstream bandwidth utilizing an integrated multiplexing device | |||
| 14 | 9542957 | Procedure and mechanism for controlling and using voice communication | |||
| 15 | 9538297 | Enhancement of reverberant speech by binary mask estimation | |||
| 16 | 9538283 | Ear microphone | |||
2016 | |||||
| 17 | 9530419 | Encoding of stereophonic signals | |||
| 18 | 9520137 | Method for suppressing the late reverberation of an audio signal | |||
| 19 | 9516410 | Asynchronous clock frequency domain acoustic echo canceller | |||
| 20 | 9516409 | Echo cancellation and control for microphone beam patterns | |||
| 21 | 9514763 | Noise reduction via tuned acoustic echo cancellation | |||
| 22 | 9509854 | Echo cancellation | |||
| 23 | 9503812 | Systems and methods for split echo cancellation | |||
| 24 | 9497544 | Systems and methods for surround sound echo reduction | |||
| 25 | 9497330 | Signal processing method, signal processing device, and signal processing program | |||
| 26 | 9497025 | Ethernet interface module | |||
| 27 | 9491561 | Acoustic echo cancellation with internal upmixing | |||
| 28 | 9485596 | Utilizing a smartphone during a public address system session | |||
| 29 | 9484983 | Impedance adjustment method, delay capacitance adjustment method and associated apparatus for communication device | |||
| 30 | 9484011 | Echo modulation methods and system | |||
| 31 | 9479368 | Method and apparatus for adjusting pre-distortion coefficient | |||
| 32 | 9473204 | Full-duplex transceiver circuit and method thereof | |||
| 33 | 9472203 | Clock synchronization for multichannel system | |||
| 34 | 9467571 | Echo removal | |||
| 35 | 9454975 | Voice trigger | |||
| 36 | 9451078 | Universal reconfigurable echo cancellation system | |||
| 37 | 9443530 | Acoustic echo cancellation | |||
| 38 | 9443528 | Method and device for eliminating echoes | |||
| 39 | 9438992 | Multi-microphone robust noise suppression | |||
| 40 | 9437210 | Audio signal processing | |||
| 41 | 9431013 | Co-talker nulling for automatic speech recognition systems | |||
| 42 | 9420370 | Audio processing device and audio processing method | |||
| 43 | 9414158 | Single-channel, binaural and multi-channel dereverberation | |||
| 44 | 9414157 | Method and device for reducing voice reverberation based on double microphones | |||
| 45 | 9413434 | Cancellation of interfering audio on a mobile device | |||
| 46 | 9413422 | Communication system and method for cancelling timing dependence of signals | |||
| 47 | 9407410 | Method and apparatus for signaling to a mobile device with set of training sequence codes to use for a communication link | |||
| 48 | 9386373 | System and method for estimating a reverberation time | |||
| 49 | 9385779 | Acoustic echo control for automated speaker tracking systems | |||
| 50 | 9378754 | Adaptive spatial classifier for multi-microphone systems | |||
| 51 | 9362980 | Genetically-engineered microbial oil dielectric fluid | |||
| 52 | 9361874 | Varying adaptive filter step size in acoustic echo cancellation | |||
| 53 | 9352701 | Managing telephony and entertainment audio in a vehicle audio platform | |||
| 54 | 9351091 | Apparatus with adaptive microphone configuration based on surface proximity, surface type and motion | |||
| 55 | 9349363 | Audio signal processing system and echo signal removing method thereof | |||
| 56 | 9343078 | Pre-process (amplitude distortion) and post-process (phase synchronization) for linear AEC system | |||
| 57 | 9325855 | Echo elimination device and method for miniature hands-free voice communication system | |||
| 58 | 9319791 | Reduced-delay subband signal processing system and method | |||
| 59 | 9319783 | Attenuation of output audio based on residual echo | |||
| 60 | 9319532 | Acoustic echo cancellation for audio system with bring your own devices (BYOD) | |||
| 61 | 9319362 | Messaging 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 | |||
| 62 | 9312912 | Signal transmitting and receiving circuit of digital subscriber line | |||
| 63 | 9312586 | System and method for reducing effects of switched capacitor kickback noise | |||
| 64 | 9307318 | Audio processor circuits for acoustic echo cancellation and method therefor | |||
| 65 | 9294860 | Identifying directions of acoustically reflective surfaces | |||
| 66 | 9294858 | Controlling acoustic echo cancellation while handling a wireless microphone | |||
| 67 | 9288576 | Dereverberation parameter estimation device and method, dereverberation/echo-cancellation parameter estimation device, dereverberation device, dereverberation/echo-cancellation device, and dereverberation device online conferencing system | |||
| 68 | 9286883 | Acoustic echo cancellation and automatic speech recognition with random noise | |||
| 69 | 9282023 | Resistance arranging system and method based on RS-485 network | |||
| 70 | 9280986 | Acoustic signal processing device and acoustic signal processing method | |||
| 71 | 9277059 | Echo removal | |||
| 72 | 9270590 | Method, apparatus and system for transmitting packets in virtual network with respect to a virtual machine (VM) migration | |||
| 73 | 9264807 | Multichannel acoustic echo reduction | |||
| 74 | 9264553 | Methods and apparatuses for echo cancelation with beamforming microphone arrays | |||
| 75 | 9258790 | Dynamic power spectrum management method, spectrum optimization system and client device | |||
| 76 | 9246545 | Adaptive estimation of delay in audio systems | |||
| 77 | 9246543 | Smart audio and video capture systems for data processing systems | |||
| 78 | 9241214 | Direct sound extraction device and reverberant sound extraction device | |||
| 79 | 9237241 | Voice packet dynamic echo cancellation system | |||
2015 | |||||
| 80 | 9225492 | Cyclic prefix based opportunistic transmission/reception scheme for interference cancelation | |||
| 81 | 9219456 | Correcting clock drift via embedded sin waves | |||
| 82 | 9215328 | Beamforming apparatus and method based on long-term properties of sources of undesired noise affecting voice quality | |||
| 83 | 9215327 | Methods and apparatuses for multi-channel acoustic echo cancelation | |||
| 84 | 9210507 | Microphone hiss mitigation | |||
| 85 | 9210504 | Processing audio signals | |||
| 86 | 9210502 | Echo cancelling device | |||
| 87 | 9203972 | Efficient audio signal processing in the sub-band regime | |||
| 88 | 9185506 | Comfort noise generation based on noise estimation | |||
| 89 | 9185233 | Audio communication device and method using fixed echo cancellation filter coefficients | |||
| 90 | 9184791 | Selective adaptive audio cancellation algorithm configuration | |||
| 91 | 9179217 | Signal processing apparatus and signal processing method | |||
| 92 | 9160404 | Reverberation reduction device and reverberation reduction method | |||
| 93 | 9148724 | Audio system signal processing control using microphone movement information | |||
| 94 | 9148352 | Method and system for dynamic repurposing of payload storage as a trace buffer | |||
| 95 | 9148200 | Determining power over ethernet impairment | |||
| 96 | 9143186 | Transceiver and communication device | |||
| 97 | 9136905 | Multi-receiving terminal echo cancellation method and system | |||
| 98 | 9130747 | Software radio frequency canceller | |||
| 99 | 9129594 | Signal processing apparatus and signal processing method | |||
| 100 | 9111544 | Mono and multi-channel echo compensation from selective output | |||
| 101 | 9100466 | Method for processing an audio signal and audio receiving circuit | |||
| 102 | 9093077 | Reverberation suppression device, reverberation suppression method, and computer-readable storage medium storing a reverberation suppression program | |||
| 103 | 9083427 | Transceiver and communication method of digital subscriber line | |||
| 104 | 9077529 | Method and apparatus for reducing nonlinear echo distortion in a communication device | |||
| 105 | 9076426 | Training an echo canceller in severe noise | |||
| 106 | 9071328 | Transceiver with automatic detection of unshielded twisted pair or shielded twisted pair cabling | |||
| 107 | 9065895 | Non-linear echo cancellation | |||
| 108 | 9060052 | Single channel, binaural and multi-channel dereverberation | |||
| 109 | 9049281 | Nonlinear echo suppression | |||
| 110 | 9047862 | Audio signal processing method, audio apparatus therefor, and electronic apparatus therefor | |||
| 111 | 9042567 | Acoustic echo cancellation system | |||
| 112 | 9042566 | Wideband acoustic echo cancellation apparatus with adaptive tail length in embedded system, and wideband acoustic echo cancellation method | |||
| 113 | 9036829 | Adaptive notch filter with variable bandwidth, and method and apparatus for canceling howling by using the adaptive notch filter with variable bandwidth | |||
| 114 | 9036826 | Echo cancellation using closed-form solutions | |||
| 115 | 9036825 | Audio signal correction and calibration for a room environment | |||
| 116 | 9025529 | Communication terminal, communication device, method for data communication, and method for frequency allocation | |||
| 117 | 9020163 | Near-field null and beamforming | |||
| 118 | 9008326 | Method for testing echo cancellers | |||
| 119 | 9002024 | Reverberation suppressing apparatus and reverberation suppressing method | |||
| 120 | 9001713 | Communication apparatus and communication method, computer program, and communication system | |||
| 121 | 8989063 | Time division multiple access far end crosstalk channel estimation | |||
| 122 | 8983085 | Method and apparatus for reducing noise pumping due to noise suppression and echo control interaction | |||
| 123 | 8982745 | Method for improving the data rate of mobile/handheld data and the quality of channel estimation in an ATSC-M/H transport data stream | |||
| 124 | 8982744 | Method and system for a subband acoustic echo canceller with integrated voice activity detection | |||
| 125 | 8964967 | Subband domain echo masking for improved duplexity of spectral domain echo suppressors | |||
| 126 | 8964608 | Interference cancellation for division free duplexing or full duplex operation | |||
| 127 | 8958571 | MIC covering detection in personal audio devices | |||
| 128 | 8953506 | Time multiplexing for coexistence within multiple communication systems | |||
| 129 | 8942382 | Dynamic beamformer processing for acoustic echo cancellation in systems with high acoustic coupling | |||
| 130 | 8934945 | Voice switching for voice communication on computers | |||
| 131 | 8929263 | Echo mitigation in the presence of variable delays due to adaptive jitter buffers | |||
2014 | |||||
| 132 | 8917639 | Eliminating false audio associated with VoIP communications | |||
| 133 | 8897182 | Apparatus and method for transmitting muting information, and apparatus and method for acquiring channel state using same | |||
| 134 | 8880017 | Active resistive summer for a transformer hybrid | |||
| 135 | 8879438 | Resource efficient acoustic echo cancellation in IP networks | |||
| 136 | 8879432 | Splitter and combiner for multiple data rate communication system | |||
| 137 | 8873764 | Acoustic echo suppression unit and conferencing front-end | |||
| 138 | 8873740 | Enhanced echo cancellation | |||
| 139 | 8867755 | Sound source separation apparatus and sound source separation method | |||
| 140 | 8855327 | Sound emission and collection device and sound emission and collection method | |||
| 141 | 8855326 | Microphone system and method of operating the same | |||
| 142 | 8848934 | Controlling audio signals | |||
| 143 | 8848933 | Signal enhancement device, method thereof, program, and recording medium | |||
| 144 | 8830848 | Adjusting a control channel timer in a wireless communication | |||
| 145 | 8830812 | Optimizing precoder settings using average SINR reports for groups of tones | |||
| 146 | 8824667 | Time-domain acoustic echo control | |||
| 147 | 8811624 | Echo cancellation method and device | |||
| 148 | 8811623 | Information processing apparatus and program | |||
| 149 | 8811602 | Full duplex speakerphone design using acoustically compensated speaker distortion | |||
| 150 | 8804977 | Nonlinear reference signal processing for echo suppression | |||
| 151 | 8804730 | Layer-2 extension services | |||
| 152 | 8804583 | System and method for medium access control enabling both full-duplex and half-duplex communications | |||
| 153 | 8798992 | Audio noise modification for event broadcasting | |||
| 154 | 8792649 | Echo canceller used for voice communication | |||
| 155 | 8787218 | Dynamic establishment of virtual circuits multisegment pseudowires | |||
| 156 | 8780686 | Reduced memory vectored DSL | |||
| 157 | 8767595 | Enhanced methods of cellular environment detection when interoperating with timed interfers | |||
| 158 | 8761410 | Systems and methods for multi-channel dereverberation | |||
| 159 | 8751029 | System for extraction of reverberant content of an audio signal | |||
| 160 | 8750308 | Communication method and server of transmission control protocol | |||
| 161 | 8750174 | Dual carrier separation | |||
| 162 | 8737278 | Full duplex wire-line transceiver with echo cancellation line driver | |||
| 163 | 8731207 | Apparatus and method for computing control information for an echo suppression filter and apparatus and method for computing a delay value | |||
| 164 | 8730852 | Eliminating false audio associated with VoIP communications | |||
| 165 | 8724823 | Method and apparatus for reducing noise pumping due to noise suppression and echo control interaction | |||
| 166 | 8724822 | Noisy environment communication enhancement system | |||
| 167 | 8718273 | Apparatus for processing echo signal and method thereof | |||
| 168 | 8717863 | Method and apparatus for vectored data transmission | |||
| 169 | 8712068 | Acoustic echo cancellation | |||
| 170 | 8711741 | Method and apparatus for networked modems | |||
| 171 | 8705759 | Method for determining a signal component for reducing noise in an input signal | |||
| 172 | 8705758 | Audio processing device and method for reducing echo from a second signal in a first signal | |||
| 173 | 8699625 | Generalized OFDM (GOFDM) for ultra-high-speed serial optical transport networks | |||
| 174 | 8693698 | Method and apparatus to reduce non-linear distortion in mobile computing devices | |||
| 175 | 8693677 | Techniques for updating filter coefficients of an adaptive filter | |||
| 176 | 8681999 | Entrainment avoidance with an auto regressive filter | |||
| 177 | 8681665 | Transceiver filter and tuning | |||
| 178 | 8675883 | Apparatus and associated methodology for suppressing an acoustic echo | |||
| 179 | 8654689 | Advanced signal processors for interference cancellation in baseband receivers | |||
| 180 | 8644496 | Echo suppressor, echo suppressing method, and computer readable storage medium | |||
| 181 | 8644495 | Echo canceler | |||
| 182 | 8644494 | Echo canceler | |||
| 183 | 8634569 | Systems and methods for echo cancellation and echo suppression | |||
| 184 | 8630211 | Hybrid radio architecture for repeaters using RF cancellation reference | |||
2013 | |||||
| 185 | 8606573 | Voice recognition improved accuracy in mobile environments | |||
| 186 | 8606249 | Methods and systems for enhancing audio quality during teleconferencing | |||
| 187 | 8605566 | Method and system for signal emulation | |||
| 188 | 8600038 | System and method for echo cancellation | |||
| 189 | 8584170 | System and method of internet group management for multicast push in passive access networks | |||
| 190 | 8582781 | Echo modulation methods and systems | |||
| 191 | 8582443 | Method and apparatus for virtual cable test using echo canceller coefficients | |||
| 192 | 8571030 | System and method for computing cost metrics for wireless network links | |||
| 193 | 8565127 | Voice-activity detection based on far-end and near-end statistics | |||
| 194 | 8553898 | Method and system for reducing acoustical reverberations in an at least partially enclosed space | |||
| 195 | 8538035 | Multi-microphone robust noise suppression | |||
| 196 | 8538034 | Method and arrangement for echo cancellation of voice signals | |||
| 197 | 8537728 | Communication apparatus with echo cancellation and method thereof | |||
| 198 | 8532306 | Method and an apparatus of decoding an audio signal | |||
| 199 | 8526340 | Selectively adaptable far-end echo cancellation in a packet voice system | |||
| 200 | 8526339 | Echo cancellation circuit | |||
| 201 | 8521530 | System and method for enhancing a monaural audio signal | |||
| 202 | 8515086 | Method and system for clock drift compensation | |||
| 203 | 8515055 | Adaptive filtering with flexible selection of algorithm complexity and performance | |||
| 204 | 8514753 | Data format and data transfer | |||
| 205 | 8509450 | Dynamic audibility enhancement | |||
| 206 | 8509126 | Method and system for utilizing a reserved and/or out of band channel for maintaining a network connection | |||
| 207 | 8509125 | Method and apparatus for reducing nonlinear echo distortion in a communication device | |||
| 208 | 8503961 | Active resistive summer for a transformer hybrid | |||
| 209 | 8503669 | Integrated latency detection and echo cancellation | |||
| 210 | 8498429 | Acoustic correction apparatus, audio output apparatus, and acoustic correction method | |||
| 211 | 8498423 | Device for and a method of processing audio signals | |||
| 212 | 8483398 | Methods and systems for reducing acoustic echoes in multichannel communication systems by reducing the dimensionality of the space of impulse responses | |||
| 213 | 8472616 | Self calibration of envelope-based acoustic echo cancellation | |||
| 214 | 8467544 | Filter coefficient setting device and echo prevention device | |||
| 215 | 8467538 | Dereverberation apparatus, dereverberation method, dereverberation program, and recording medium | |||
| 216 | 8462962 | Sound processor, sound processing method and recording medium storing sound processing program | |||
| 217 | 8462958 | Apparatus and method for computing filter coefficients for echo suppression | |||
| 218 | 8462783 | Method and a node device for transferring a message based on traffic engineering tunnels | |||
| 219 | 8462675 | Echo mitigation in the presence of variable delays due to adaptive jitter buffers | |||
| 220 | 8441912 | Method and apparatus for data transmission | |||
| 221 | 8437272 | Distinguishing between connectivity verification availability and forwarding protocol functionality in a computer network | |||
| 222 | 8433074 | Echo suppressing method and apparatus | |||
| 223 | 8422688 | Method and an apparatus of decoding an audio signal | |||
| 224 | 8422663 | Structure and method for echo reduction without loss of information | |||
| 225 | 8422412 | Duplexer and switch enhancement | |||
| 226 | 8416719 | Generating an estimated non-linear echo signal | |||
| 227 | 8411871 | Echo cancellation | |||
| 228 | 8411847 | Acoustic echo canceller | |||
| 229 | 8411603 | Method and system for dual digital microphone processing in an audio CODEC | |||
| 230 | 8406430 | Simulated background noise enabled echo canceller | |||
| 231 | 8401203 | Information processing apparatus and program | |||
| 232 | 8391505 | Reverberation suppressing apparatus and reverberation suppressing method | |||
| 233 | 8391504 | Method and system for artificial reverberation employing dispersive delays | |||
| 234 | 8391191 | System and method for the application on an LMS method to updating an echo canceller in an ADSL modem | |||
| 235 | 8385557 | Multichannel acoustic echo reduction | |||
| 236 | 8384759 | Video conferencing apparatus and method for configuring a communication session | |||
| 237 | 8380253 | Voice switching for voice communication on computers | |||
| 238 | 8374355 | Robust and efficient frequency-domain decorrelation method | |||
| 239 | 8369251 | Timestamp quality assessment for assuring acoustic echo canceller operability | |||
| 240 | 8355511 | System and method for envelope-based acoustic echo cancellation | |||
| 241 | 8345583 | Method for enhancing ethernet channel impairment and apparatus using the same | |||
2012 | |||||
| 242 | 8335319 | Double talk detection method based on spectral acoustic properties | |||
| 243 | 8325909 | Acoustic echo suppression | |||
| 244 | 8325635 | Systems and methods for facsimile echo cancellation | |||
| 245 | 8320577 | Method and apparatus for multi-channel audio processing using single-channel components | |||
| 246 | 8320575 | Efficient audio signal processing in the sub-band regime | |||
| 247 | 8320574 | Methods and systems for reducing acoustic echoes in communication systems | |||
| 248 | 8320553 | Enhanced echo cancellation | |||
| 249 | 8320552 | Delay estimator | |||
| 250 | 8311234 | Echo canceller and communication audio processing apparatus | |||
| 251 | 8310937 | Voice packet dynamic echo cancellation system | |||
| 252 | 8295501 | Method for testing echo cancellers | |||
| 253 | 8295474 | Echo canceller with heavy double-talk estimation | |||
| 254 | 8295214 | Reducing transmit signal components of a receive signal of a transceiver | |||
| 255 | 8290170 | Method and apparatus for speech dereverberation based on probabilistic models of source and room acoustics | |||
| 256 | 8290143 | Delay estimator | |||
| 257 | 8284949 | Multi-channel acoustic echo cancellation system and method | |||
| 258 | 8284948 | Engine sound processing apparatus | |||
| 259 | 8284947 | Reverberation estimation and suppression system | |||
| 260 | 8279783 | Linear-equivalent echo and next cancellers for Tomlinson-Harashima Precoding (THP) systems | |||
| 261 | 8275142 | Acoustic echo cancellation system | |||
| 262 | 8275139 | Linear full duplex system and method for acoustic echo cancellation | |||
| 263 | 8271277 | Dereverberation apparatus, dereverberation method, dereverberation program, and recording medium | |||
| 264 | 8270323 | Apparatus for, and method of, reducing noise in a communications system | |||
| 265 | 8265290 | Dereverberation system and dereverberation method | |||
| 266 | 8265289 | Method and system for clear signal capture | |||
| 267 | 8265263 | Delayed adaptation structure for improved double-talk immunity in echo cancellation devices | |||
| 268 | 8259629 | System and method for transmitting and receiving wideband speech signals with a synthesized signal | |||
| 269 | 8255967 | Method and apparatus for high speed data services | |||
| 270 | 8254588 | System and method for providing step size control for subband affine projection filters for echo cancellation applications | |||
| 271 | 8248974 | All-digital timing control for multi-channel full-duplex transceiver | |||
| 272 | 8243635 | Information processing apparatus | |||
| 273 | 8233632 | Method and apparatus for multi-channel audio processing using single-channel components | |||
| 274 | 8223960 | Apparatus and method for removing an echo signal in a signal transmission/reception apparatus of a communication system | |||
| 275 | 8223959 | Echo cancellation in which sound source signals are spatially distributed to all speaker devices | |||
| 276 | 8218780 | Methods and systems for blind dereverberation | |||
| 277 | 8208623 | Echo processing method and device | |||
| 278 | 8203975 | Adaptive analog echo/NEXT cancellation | |||
| 279 | 8199927 | Conferencing system implementing echo cancellation and push-to-talk microphone detection using two-stage frequency filter | |||
| 280 | 8199922 | Ethernet isolator for microphonics security and method thereof | |||
| 281 | 8199921 | Sound field controlling device | |||
| 282 | 8184818 | Double-talk detector with accuracy and speed of detection improved and a method therefor | |||
| 283 | 8179781 | Method and apparatus for encoding data for transmission in a communication system | |||
| 284 | 8170224 | Wideband speakerphone | |||
| 285 | 8170199 | Echo canceller | |||
| 286 | 8165310 | Dereverberation and feedback compensation system | |||
| 287 | 8155303 | System and method for cancelling echo | |||
| 288 | 8150052 | Integrating acoustic echo cancellation as a subsystem into an existing videoconference and telepresence system | |||
| 289 | 8135058 | Adaptive known signal canceller | |||
| 290 | 8130969 | Multi-channel echo compensation system | |||
| 291 | 8130941 | Echo canceler | |||
| 292 | 8126078 | Method and apparatus for reducing noise in an unbalanced channel using common mode component | |||
| 293 | 8125934 | System and method for synchronization signal detection and recovery from false triggers | |||
| 294 | 8121062 | Method and apparatus for cross-talk cancellation in frequency division multiplexed transmission systems | |||
| 295 | 8116471 | Audio signal dereverberation | |||
| 296 | 8116240 | Bi-directional bridge circuit having high common mode rejection and high input sensitivity | |||
| 297 | 8111637 | Method, arrangement and device for precompensation of crosstalk in a DSL MIMO system | |||
| 298 | 8103011 | Signal detection using multiple detectors | |||
2011 | |||||
| 299 | 8085947 | Multi-channel echo compensation system | |||
| 300 | 8077643 | Systems and methods for synchronizing audio signals of a communication device | |||
| 301 | 8077642 | Methods and apparatus for signal echo cancellation and transmitter calibration in full duplex systems | |||
| 302 | 8077641 | Echo cancellation for channels with unknown time-varying gain | |||
| 303 | 8073147 | Dereverberation method, apparatus, and program for dereverberation | |||
| 304 | 8073133 | Echo canceler and echo canceling method | |||
| 305 | 8059826 | Efficient and scalable parametric stereo coding for low bitrate audio coding applications | |||
| 306 | 8050645 | Active resistive summer for a transformer hybrid | |||
| 307 | 8045946 | Active resistive summer for a transformer hybrid | |||
| 308 | 8045492 | Dynamic establishment of virtual circuits using multi-segment pseudowires | |||
| 309 | 8045491 | Signal handling for wireless clients | |||
| 310 | 8041844 | Autodetection of a PCI express device operating at a wireless RF mitigation frequency | |||
| 311 | 8041046 | Reverberation adjusting apparatus, reverberation adjusting method, reverberation adjusting program, recording medium on which the reverberation adjusting program is recorded, and sound field correcting system | |||
| 312 | 8027279 | Echo cancellation | |||
| 313 | 8023662 | Reverberation adjusting apparatus, reverberation correcting method, and sound reproducing system | |||
| 314 | 8023438 | Analog signal path modeling for self-interference cancellation | |||
| 315 | 8014879 | Methods and systems for adaptive control | |||
| 316 | 8005023 | Client-side echo cancellation for multi-party audio conferencing | |||
| 317 | 8000274 | Versatile system for transceiver noise reduction in a time-division duplexing wireless network | |||
| 318 | 7983293 | External signal supply unit, vehicle state acquisition system and external signal supply method | |||
| 319 | 7945656 | Method for determining round trip times for devices with ICMP echo disable | |||
| 320 | 7929469 | Method and hybrid circuit for attenuating near-end crosstalk in a bidirectional signal transmission | |||
| 321 | 7920599 | Methods and systems for synchronizing wireless transmission of data packets | |||
| 322 | 7920492 | Devices, softwares and methods for redundantly encoding a data stream for network transmission with adjustable redundant-coding delay | |||
| 323 | 7920491 | System and method for split isolation in radio frequency electronics | |||
| 324 | 7899195 | Adaptive howling canceller | |||
| 325 | 7898992 | Network apparatus with shared coefficient update processor and method thereof | |||
| 326 | 7876909 | Efficient filter for artificial ambience | |||
| 327 | 7876718 | Echo reduction | |||
| 328 | 7864718 | Echo cancellation device for full duplex communication systems | |||
2010 | |||||
| 329 | 7856353 | Method for processing speech signal data with reverberation filtering | |||
| 330 | 7852792 | Packet based echo cancellation and suppression | |||
| 331 | 7844059 | Dereverberation of multi-channel audio streams | |||
| 332 | 7843859 | Analog echo canceller with filter banks | |||
| 333 | 7843858 | Crosstalk masking for digital subscriber loops | |||
| 334 | 7835311 | Voice-activity detection based on far-end and near-end statistics | |||
| 335 | 7826333 | Optical recording medium | |||
| 336 | 7812693 | Lowpass-bandstop common mode filter for differential lines carrying high rate digital signals | |||
| 337 | 7808993 | Bidirectional multicast protocol with upstream and downstream join messages | |||
| 338 | 7808937 | Variable interference cancellation technology for CDMA systems | |||
| 339 | 7808936 | Systems and methods for facsimile echo cancellation | |||
| 340 | 7804916 | Detector for detecting a frequency-shift keying signal by digital processing | |||
| 341 | 7804828 | Communication method between communication networks | |||
| 342 | 7804760 | Method and system for signal emulation | |||
| 343 | 7796767 | Howling detection method, device, and acoustic device using the same | |||
| 344 | 7787635 | Dip filter frequency characteristic decision method | |||
| 345 | 7787460 | System and method for switching packet traffic over an optical transport network | |||
| 346 | 7787459 | Method and system for implementing traversal through network address translation | |||
| 347 | 7778210 | Bridge circuit to suppress echoes in communication devices | |||
| 348 | 7778209 | Passive echo cancellation device and signal transmission method thereof | |||
| 349 | 7769186 | System and method facilitating acoustic echo cancellation convergence detection | |||
| 350 | 7764799 | Audio system providing for filter coefficient copying | |||
| 351 | 7764634 | Suppression of acoustic feedback in voice communications | |||
| 352 | 7761076 | Apparatus and method for converting single-ended signals to a differential signal, and transceiver employing same | |||
| 353 | 7760887 | Updating modeling information based on online data gathering | |||
| 354 | 7760673 | Selectively adaptable far-end echo cancellation in a packet voice system | |||
| 355 | 7760672 | Method and device for the echo compensation of a reception signal | |||
| 356 | 7751465 | Cancellation of pilot and traffic signals | |||
| 357 | 7747240 | Method of charging in a communications network | |||
| 358 | 7742607 | Method for designing a modal equalizer for a low frequency sound reproduction | |||
| 359 | 7742386 | Multiple channel interference cancellation | |||
| 360 | 7738567 | Baseline wander correction for communication receivers | |||
| 361 | 7733770 | Congestion control in a network | |||
| 362 | 7724693 | Network dependent signal processing | |||
| 363 | 7720236 | Updating modeling information based on offline calibration experiments | |||
| 364 | 7720232 | Speakerphone | |||
| 365 | 7720015 | Receiver ADC clock delay base on echo signals | |||
| 366 | 7706546 | Computer-based onboard noise suppression devices with remote web-based management features | |||
| 367 | 7697696 | Audio amplification apparatus with howling canceler | |||
| 368 | 7697462 | System and method for split isolation in radio frequency electronics | |||
| 369 | 7693291 | Multi-channel frequency-domain adaptive filter method and apparatus | |||
| 370 | 7684578 | Wave field synthesis apparatus and method of driving an array of loudspeakers | |||
| 371 | 7672446 | Echo processing method and device | |||
| 372 | 7668122 | Communication apparatus using a transmission medium and method for the same | |||
| 373 | 7660425 | Acoustic echo cancellation | |||
| 374 | 7656827 | Apparatus for, and method of, reducing noise in a communications system | |||
| 375 | 7649856 | System and method for transmitting and receiving wideband speech signals | |||
2009 | |||||
| 376 | 7627348 | Point to multipoint device for communication with a plurality of telecommunications units | |||
| 377 | 7623519 | Rule based routing in a switch | |||
| 378 | 7606547 | Active resistance summer for a transformer hybrid | |||
| 379 | 7606183 | Devices, softwares and methods with improved performance of acoustic echo canceller in VoIP communication | |||
| 380 | 7599432 | Method and apparatus for dynamically inserting gain in an adaptive filter system | |||
| 381 | 7599316 | Bi-directional bridge circuit having high common mode rejection and high input sensitivity | |||
| 382 | 7590077 | Canceller device and data transmission system | |||
| 383 | 7583768 | Apparatus for canceling intersymbol interference in semiconductor memory device and method thereof | |||
| 384 | 7583621 | Method and apparatus for suppressing echo cancelling in a packet switched network | |||
| 385 | 7574005 | Howling frequency component emphasis method and apparatus | |||
| 386 | 7570608 | Echo canceller disabler for modulated data signals | |||
| 387 | 7567759 | Optical apparatus | |||
| 388 | 7558729 | Music detection for enhancing echo cancellation and speech coding | |||
| 389 | 7558224 | Management of packet-based audio devices within acoustic spaces | |||
| 390 | 7554933 | Echo cancellation device for full duplex communication systems | |||
| 391 | 7551616 | Forwarding packets to aggregated links using distributed ingress card processing | |||
| 392 | 7536162 | Active resistive summer for a transformer hybrid | |||
| 393 | 7535859 | Voice activity detection with adaptive noise floor tracking | |||
| 394 | 7502338 | De-emphasis training on a point-to-point connection | |||
| 395 | 7502337 | Intelligent voice network monitoring using echo cancellation statistics | |||
| 396 | 7502336 | Multi-carrier communication using adaptive tone-pruning | |||
| 397 | 7483420 | DSP circuitry for supporting multi-channel applications by selectively shifting data through registers | |||
| 398 | 7480262 | Telephone terminal, telephone system using telephone terminal and control method of telephone terminal | |||
2008 | |||||
| 399 | 7468957 | Canceller circuit and controlling method | |||
| 400 | 7466971 | Active resistive summer for a transformer hybrid | |||
| 401 | 7460499 | Modulation noise estimation mechanism | |||
| 402 | 7460498 | System and method for detecting anomalies along telecommunication lines | |||
| 403 | 7457353 | Method and system for mitigating Fourier transform side lobes | |||
| 404 | 7457258 | Tunable filter to facilitate communications | |||
| 405 | 7450528 | Method and apparatus for performing echo suppression | |||
| 406 | 7443812 | Voice and data exchange over a packet based network with AGC | |||
| 407 | 7443810 | Wireless terminals | |||
| 408 | 7436787 | Transceiver for full duplex communication systems | |||
| 409 | 7433665 | Apparatus and method for converting single-ended signals to a differential signal, and transceiver employing same | |||
| 410 | 7420937 | Selectively adaptable far-end echo cancellation in a packet voice system | |||
| 411 | 7408891 | Echo canceller employing H-register and storage register | |||
| 412 | 7397772 | Method and apparatus for acoustic echo cancellation in a communication system providing TTY/TDD service | |||
| 413 | 7392520 | Method and apparatus for upgrading software in network bridges | |||
| 414 | 7379431 | Error correction method and apparatus for TTY on VoIP transmissions | |||
| 415 | 7369516 | Adaptive echo canceling | |||
| 416 | 7366161 | Full duplex voice path capture buffer with time stamp | |||
| 417 | 7366118 | Echo cancellation | |||
| 418 | 7362719 | Method and apparatus for cross-talk cancellation in frequency division multiplexed transmission systems | |||
| 419 | 7355989 | Echo canceling method and device for multiplex line | |||
| 420 | 7352687 | Mixed domain cancellation | |||
| 421 | 7349353 | Techniques to reduce echo | |||
| 422 | 7346014 | System and method for echo cancellation | |||
| 423 | 7346013 | Frequency domain equalization of communication signals | |||
| 424 | 7346012 | Transceiver with accelerated echo canceller convergence | |||
| 425 | 7333448 | Full duplex transceiver | |||
| 426 | 7333447 | Packet voice system with far-end echo cancellation | |||
| 427 | 7327995 | Active resistance summer for a transformer hybrid | |||
| 428 | 7324490 | Communication system, address management method, relay device, and management device | |||
| 429 | 7324467 | Bridge circuit to suppress echoes in communication devices | |||
| 430 | 7324466 | Echo canceling system and echo canceling method | |||
| 431 | 7321568 | Realtime management of processing resources | |||
2007 | |||||
| 432 | 7310425 | Multi-channel frequency-domain adaptive filter method and apparatus | |||
| 433 | 7308494 | Reprovisioning technique for an interconnect fabric design | |||
| 434 | 7304962 | Delay measurement system in a packet network | |||
| 435 | 7304961 | Echo cancellation device for full duplex communication systems | |||
| 436 | 7298711 | Echo cancellation in a communication device | |||
| 437 | 7292564 | Method and apparatus for use in real-time, interactive radio communications | |||
| 438 | 7286674 | Method for designing a modal equalizer for a low frequency audible range especially for closely positioned modes | |||
| 439 | 7286496 | IP network communication device with facsimile communication function | |||
| 440 | 7280493 | Method for hardware reduction in echo canceller and near-end crosstalk canceller | |||
| 441 | 7277403 | Duplexer with a differential receiver port implemented using acoustic resonator elements | |||
| 442 | 7269211 | Residual echo reduction for a full duplex transceiver | |||
| 443 | 7266092 | Adaptive frequency duplexing system and method | |||
| 444 | 7263074 | Voice activity detection based on far-end and near-end statistics | |||
| 445 | 7254116 | Method and apparatus for transceiver noise reduction in a frame-based communications network | |||
| 446 | 7242684 | Architecture for switching packets in a high-speed switching environment | |||
| 447 | 7237020 | Integer programming technique for verifying and reprovisioning an interconnect fabric design | |||
| 448 | 7236463 | Transceiver for echo and near-end crosstalk cancellation without loop timing configuration | |||
| 449 | 7230954 | Cross link intra-vehicular data communication using a field coupled transmission line | |||
| 450 | 7227883 | Method and apparatus for domain transformation multiple signal processing | |||
| 451 | 7221659 | Method and system for managing erroneous attenuation of signal | |||
| 452 | 7212502 | Method and apparatus for dynamically adapting telephony analog loss based on channel content | |||
| 453 | 7197146 | Microphone array signal enhancement | |||
| 454 | 7187719 | Method and system for data rate optimization in a digital communication system | |||
| 455 | 7184416 | Techniques to cancel echo tail | |||
| 456 | 7171246 | Noise suppression | |||
| 457 | 7171004 | Room acoustics echo meter for voice terminals | |||
| 458 | 7171003 | Robust and reliable acoustic echo and noise cancellation system for cabin communication | |||
| 459 | 7167568 | Microphone array signal enhancement | |||
| 460 | 7164659 | Adaptive gain control based on echo canceller performance information | |||
2006 | |||||
| 461 | 7155018 | System and method facilitating acoustic echo cancellation convergence detection | |||
| 462 | 7154867 | Echo reduction | |||
| 463 | 7142533 | Echo canceller and compression operators cascaded in time division multiplex voice communication path of integrated access device for decreasing latency and processor overhead | |||
| 464 | 7142518 | Monitoring communications networks | |||
| 465 | 7136471 | Method and apparatus for detecting a secondary destination of a telephone call based on changes in the telephone signal path | |||
| 466 | 7133529 | Howling detecting and suppressing apparatus, method and computer program product | |||
| 467 | 7133442 | Rapid identification of transmission media channel characteristics | |||
| 468 | 7130428 | Picked-up-sound recording method and apparatus | |||
| 469 | 7130281 | Devices, softwares and methods with improved performance of acoustic echo canceler in VoIP communication | |||
| 470 | 7120130 | Seamless redundant echo canceller replacement in a multi-channel echo canceller | |||
| 471 | 7113491 | Method and system for varying an echo canceller filter length based on data rate | |||
| 472 | 7106815 | Ingress noise reduction in a digital receiver | |||
| 473 | 7103015 | DSL transmission system with means for ensuring local echo orthogonality | |||
| 474 | 7103014 | Systems and methods for improving sound quality in computer-network telephony application | |||
| 475 | 7099459 | Method and device for handling echo in a communication network | |||
| 476 | 7092365 | Voice and data exchange over a packet based network with AGC | |||
| 477 | 7088770 | Adaptive turbo decision feedback equalization method and device | |||
| 478 | 7085245 | Coefficient domain history storage of voice processing systems | |||
| 479 | 7082157 | Residual echo reduction for a full duplex transceiver | |||
| 480 | 7072310 | Echo canceling system | |||
| 481 | 7065056 | Transceiver circuit including an echo canceller | |||
| 482 | 7058315 | Fast decision threshold controller for burst-mode receiver | |||
| 483 | 7035415 | Method and device for acoustic echo cancellation combined with adaptive beamforming | |||
| 484 | 7031269 | Acoustic echo canceller | |||
| 485 | 7027562 | System and method to reduce echoes in voice communications | |||
| 486 | 7023812 | System and method for improving modem transmission through private branch exchanges, central offices, and other systems | |||
| 487 | 7020101 | Method of implementing a repeater, and a transceiver unit | |||
| 488 | 7020099 | Apparatus for, and method of, reducing noise in a communications system | |||
| 489 | 7016355 | Determination of the propagation delay in a packet switched network | |||
| 490 | 7013226 | Reflectometer with echo canceller | |||
| 491 | 7009945 | Dual-mode analog/digital adaptive echo cancellation in communication systems with asymmetric spectrum | |||
| 492 | 7006458 | Echo canceller disabler for modulated data signals | |||
| 493 | 7002931 | Power efficient line driver with high performance echo cancellation for 1000BASE-T | |||
| 494 | 7002930 | Method of optimal power distribution for communication systems | |||
| 495 | 7002897 | Multiple channel interference cancellation | |||
| 496 | 6990084 | Echo cancellation with dynamic latency adjustment | |||
| 497 | 6990083 | Method and device for computing echo-cancellation coefficients using FFT | |||
| 498 | 6987782 | Method and apparatus for detecting robbed bit location in PCM modems and the like | |||
2005 | |||||
| 499 | 6968064 | Adaptive thresholds in acoustic echo canceller for use during double talk | |||
| 500 | 6963642 | Band-by-band full duplex communication | |||
| 501 | 6937056 | System and method for transmission-line termination by signal cancellation, and applications thereof | |||
| 502 | 6922403 | Acoustic echo control system and double talk control method thereof | |||
| 503 | 6917682 | Method and device for echo cancelling | |||
| 504 | 6865162 | Elimination of clipping associated with VAD-directed silence suppression | |||
| 505 | 6853626 | Method and apparatus for echo cancellation in an asymmetric communication system | |||
2004 | |||||
| 506 | 6804349 | Hybrid transceiver circuit | |||
| 507 | 6799062 | Full-duplex hands-free transparency circuit and method therefor | |||
| 508 | 6735181 | Wireless transceiver with subtractive filter compensating both transmit and receive artifacts | |||
| 509 | 6714646 | Method and apparatus for echo suppression | |||
| 510 | 6687236 | Method for providing echo control devices in communication links to intelligent peripherals | |||
| 511 | 6678254 | Method and communication device for optimizing echo cancellation | |||
2003 | |||||
| 512 | 6658107 | Methods and apparatus for providing echo suppression using frequency domain nonlinear processing | |||
| 513 | 6633945 | Fully connected cache coherent multiprocessing systems | |||
| 514 | 6597787 | Echo cancellation device for cancelling echos in a transceiver unit | |||
| 515 | 6556677 | Single-ended echo cancellation system and method | |||
| 516 | 6535604 | Voice-switching device and method for multiple receivers | |||
| 517 | 6532289 | Method and device for echo suppression | |||
2002 | |||||
| 518 | 6469988 | Low-level circuit implementation of signal flow graphs for real-time signal processing of high-speed digital signals | |||
| 519 | 6466666 | Method and apparatus for echo estimation and suppression | |||
| 520 | 6418537 | Accurate timing calibration for each of multiple high-speed clocked receivers using a single DLL | |||
| 521 | 6415247 | System identification method and its recording device | |||
2001 | |||||
| 522 | 6246716 | Information communication system | |||
| 523 | 6191663 | Echo reduction on bit-serial, multi-drop bus | |||
2000 | |||||
| 524 | 6130943 | Method and apparatus for suppressing echo in telephony | |||
| 525 | 6088386 | Transmitter with phase rotor, modulator/demodulator, communication system and method performed thereby | |||
| 526 | 6044108 | System and method for suppressing far end echo of voice encoded speech | |||
| 527 | 6011846 | Methods and apparatus for echo suppression | |||
1999 | |||||
| 528 | 5970154 | Apparatus and method for echo cancellation | |||
| 529 | 5943645 | Method and apparatus for computing measures of echo | |||
| 530 | 5893056 | Methods and apparatus for generating noise signals from speech signals | |||
| 531 | 5887059 | System and method for performing echo cancellation in a communications network employing a mixed mode LMS adaptive balance filter | |||
| 532 | 5857167 | Combined speech coder and echo canceler | |||
1998 | |||||
| 533 | 5818945 | Subband echo cancellation method using projection algorithm | |||
| 534 | 5793755 | Echo suppressor for facsimile calls in a satellite network | |||
| 535 | 5784454 | Arrangement for communication with a subscriber | |||
| 536 | 5734987 | Noise-controlled communication apparatus | |||
| 537 | 5721730 | Spectral noise compensation for telecommunication signal processing | |||
1997 | |||||
| 538 | 5606550 | Echo canceller and method for a voice network using low rate coding and digital speech interpolation transmission | |||
1996 | |||||
| 539 | 5587998 | Method and apparatus for reducing residual far-end echo in voice communication networks | |||
| 540 | 5566167 | Subband echo canceler | |||
| 541 | 5561668 | Echo canceler with subband attenuation and noise injection control | |||
| 542 | 5517435 | Method of identifying an unknown system with a band-splitting adaptive filter and a device thereof | |||
| 543 | 5500880 | Transmission system comprising a sub-band echo canceller which includes a sub-band coding arrangement | |||
| 544 | 5487109 | End office of a telephone system with a zero loss plan | |||
1995 | |||||
| 545 | 5394392 | Method for transferring information using modems | |||
| 546 | 5381475 | Arrangement for suppressing echoes in a digital portable telephone | |||
1994 | |||||
| 547 | 5357609 | Site controller with echo suppression | |||
| 548 | 5317596 | Method and apparatus for echo cancellation with discrete multitone modulation | |||
1992 | |||||
| 549 | 5136577 | Sub-band acoustic echo canceller | |||
1991 | |||||
| 550 | 5022074 | Digital echo suppressor | |||
| 551 | 5016271 | Echo canceler-suppressor speakerphone | |||
| 552 | 5001701 | Subband echo canceler including real time allocation among the subbands | |||
| 553 | 4984265 | Device for forming the hands-free function in a telephone set, associating the gain switching and echo suppression functions | |||
1990 | |||||
| 554 | 4979163 | Echo suppression arrangement for an adaptive speakerphone | |||
1989 | |||||
| 555 | 4879745 | Half-duplex speakerphone | |||
| 556 | 4879738 | Digital telephony card for use in an operator system | |||
| 557 | 4864608 | Echo suppressor | |||
| 558 | 4831651 | Intermediate amplifier for use in two-wire connections of a dial telephone network and method for the gain control of said amplifier | |||
| 559 | 4823339 | Method and device for protecting modems against echoes | |||
1988 | |||||
| 560 | 4782525 | Echo cancellation in two-wire transmission path repeaters | |||
| 561 | 4748665 | Analog echo suppressor | |||
| 562 | 4747132 | Howling canceller | |||
| 563 | 4741025 | Speech additive distribution equipment for conferencing system | |||
| 564 | 4726062 | Duplex hands-free communications circuit | |||
1987 | |||||
| 565 | 4694450 | Method and apparatus for adaptive receiver squelch echo control | |||
| 566 | 4652703 | Digital voice transmission having improved echo suppression | |||
| 567 | 4644108 | Adaptive sub-band echo suppressor | |||
1986 | |||||
| 568 | 4628156 | Canceller trained echo suppressor | |||
| 569 | 4623980 | Method of processing electrical signals by means of Fourier transformations | |||
| 570 | 4609788 | Digital voice transmission having improved echo suppression | |||
| 571 | 4607146 | Circuit arrangement for controlling the transmission capacity of the receiving branch of a transmission system | |||
| 572 | 4591670 | Echo canceller and echo suppressor for frequency divisional attenuation of acoustic echoes | |||
1985 | |||||
| 573 | 4555596 | Loudspeaking telephones | |||
| 574 | 4546216 | Echo suppressor for improving echo canceler performance | |||
| 575 | 4507524 | Loudspeaker telephone system | |||
1984 | |||||
| 576 | 4490582 | Speakerphone control circuit | |||
| 577 | 4469916 | Method and apparatus for detecting signalling and data signals on a telephone channel | |||
| 578 | 4435621 | Speech direction detection circuits for telephone communication devices | |||
1983 | |||||
| 579 | 4394767 | Data transmission over long distance circuits | |||
| 580 | 4386242 | Impedance matching using active couplers | |||
| 581 | 4382164 | Signal stretcher for envelope generator | |||
| 582 | 4368360 | Adaptive control type echo suppressor | |||
1982 | |||||
| 583 | 4363938 | Method of and apparatus for echo detection in voice channel signals | |||
| 584 | 4360713 | Echo detector particularly for speech interpolation communication systems | |||
| 585 | 4352962 | Tone responsive disabling circuit | |||
| 586 | 4351983 | Speech detector with variable threshold | |||
| 587 | 4349707 | System for measuring the attenuation on a transmission path | |||
1981 | |||||
| 588 | 4288664 | Neutralization signal developing device for an echo suppressor | |||
| 589 | 4277645 | Multiple variable threshold speech detector | |||
| 590 | 4261051 | Time-division-multiplexed exchanger | |||
1980 | |||||
| 591 | 4215252 | Video teleconference audio echo control unit | |||
| 592 | 4213014 | Half echo-suppressor for a four-wire telephone line | |||
| 593 | 4205202 | Method and means for improving the spectrum utilization of multichannel telephone systems | |||
| 594 | 4199729 | Variable peak detector | |||
| 595 | 4192979 | Apparatus for controlling echo in communication systems utilizing a voice-activated switch | |||
| 596 | 4181970 | Digital attenuator for compressed PCM signals | |||
1979 | |||||
| 597 | 4177361 | Signaling tone transparent echo suppressor | |||
| 598 | 4175218 | Telephone switching system | |||
| 599 | 4167653 | Adaptive speech signal detector | |||
| 600 | 4166924 | Removing reverberative echo components in speech signals | |||
| 601 | 4165449 | Echo suppressor circuit | |||
| 602 | 4160873 | Level control circuitry for two way communication system | |||
| 603 | 4152657 | Echo suppression circuit | |||
1978 | |||||
| 604 | 4130743 | Terminal equipment for a multiplex carrier current telephone system | |||
| 605 | 4123626 | Digital echo attenuation circuit for a telephone system | |||
| 606 | 4115668 | Echo suppressor with SF transmission and regeneration | |||
| 607 | 4088851 | Digital echo suppressor | |||
1977 | |||||
| 608 | 4065646 | Power converter | |||
| 609 | 4053870 | Digital signal level comparison device | |||
| 610 | 4051332 | Multiplex digital echo suppression system | |||
| 611 | 4031338 | Echo suppressor using frequency-selective center clipping | |||
| 612 | 4029912 | Common control digital echo suppressor | |||
| 613 | 4028506 | Maximum value tracing circuit for digitized voice signals | |||
| 614 | 4027114 | Echo prevention circuit | |||
| 615 | 4012603 | Echo suppressor having self-adaptive means | |||
| 616 | 4008375 | Digital voice switch for single or multiple channel applications | |||
| 617 | 4005277 | Echo controller comprising a mode switch for switching echo suppressor and canceller | |||
| 618 | 4005276 | Digital voice signaling with digital echo detection and voice activity compression used to cancel echo | |||
| 619 | 4004101 | Method and device for detecting occupancy of telecommunication channels | |||
1976 | |||||
| 620 | 3992594 | Echo suppressor break-in circuitry | |||
| 621 | 3991287 | Digital echo suppressor noise insertion | |||
| 622 | 3985979 | Half-echo suppressor for a terminal of a four-wire electric line | |||
| 623 | 3985956 | Method of and means for detecting voice frequencies in telephone system | |||
| 624 | 3979559 | Data modem having line verification and automatic disconnect features | |||
| 625 | 3975686 | Loss signal generation for delta-modulated signals | |||
| 626 | 3973086 | Digital echo suppressor break-in circuitry | |||
| 627 | 3942116 | Transceiver having improved voice actuated carrier and echo suppression circuit | |||
| 628 | 3937907 | Digital echo suppressor | |||
| 629 | 3935480 | Broad band directional signal generator | |||
| 630 | 3935403 | Device for developing a neutralization signal for an echo suppressor | |||
| © 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017 | |||||