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Class Information
Number: 379/406.06
Name: Telephonic communications > Echo cancellation or suppression > Using digital signal processing
Description: Subject matter in which signals being processed have been sampled at discrete times and converted into numbers represented in binary form.










Sub-classes under this class:

Class Number Class Name Patents
379/406.08 Adaptive filtering 725
379/406.15 Additional analog processing 48
379/406.11 Convolution processing 93
379/406.12 Frequency domain analysis 89
379/406.07 Using attenuator 138


Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8712034 Adaptive analog echo/next cancellation Apr. 29, 2014
8694059 Mobile communication device and echo cancellation method Apr. 8, 2014
8675883 Apparatus and associated methodology for suppressing an acoustic echo Mar. 18, 2014
8670554 Method for encoding multiple microphone signals into a source-separable audio signal for network transmission and an apparatus for directed source separation Mar. 11, 2014
8634547 Echo canceller operative in response to fluctuation on echo path Jan. 21, 2014
8630405 Echo removing apparatus Jan. 14, 2014
8625775 Method and system for reducing echo and noise in a vehicle passenger compartment environment Jan. 7, 2014
8582781 Echo modulation methods and systems Nov. 12, 2013
8571852 Postfilter for layered codecs Oct. 29, 2013
8538034 Method and arrangement for echo cancellation of voice signals Sep. 17, 2013
8509050 Cancellation of crosstalk energy in communication loops Aug. 13, 2013
8503669 Integrated latency detection and echo cancellation Aug. 6, 2013
8478359 User interface tone echo cancellation Jul. 2, 2013
8467544 Filter coefficient setting device and echo prevention device Jun. 18, 2013
8462958 Apparatus and method for computing filter coefficients for echo suppression Jun. 11, 2013
8416959 Hearing enhancement system and components thereof Apr. 9, 2013
8406416 Configuring virtual noise parameters of very high-speed digital subscriber line Mar. 26, 2013
8401177 Combined sidetone and hybrid balance Mar. 19, 2013
8396230 Speech enhancement device and method for the same Mar. 12, 2013
8391504 Method and system for artificial reverberation employing dispersive delays Mar. 5, 2013
8385557 Multichannel acoustic echo reduction Feb. 26, 2013
8379804 Using a complex events processor (CEP) to direct the handling of individual call sessions by an interactive voice response (IVR) system Feb. 19, 2013
8320552 Delay estimator Nov. 27, 2012
8320577 Method and apparatus for multi-channel audio processing using single-channel components Nov. 27, 2012
8290143 Delay estimator Oct. 16, 2012
8290140 Sound event processing with echo analysis Oct. 16, 2012
8280036 Configuring the virtual noise parameters of a digital subscriber line Oct. 2, 2012
8260220 Communication device with reduced noise speech coding Sep. 4, 2012
8243916 CODEC circuit for POTS system Aug. 14, 2012
8238546 Echo canceler circuit and method Aug. 7, 2012
8233632 Method and apparatus for multi-channel audio processing using single-channel components Jul. 31, 2012
8204209 Full duplex hands-free telephone system Jun. 19, 2012
8194851 Voice processing apparatus, voice processing system, and voice processing program Jun. 5, 2012
8184802 Adaptive analog echo/next cancellation May. 22, 2012
8170224 Wideband speakerphone May. 1, 2012
8170226 Acoustic echo cancellation and adaptive filters May. 1, 2012
8160239 Echo canceller and speech processing apparatus Apr. 17, 2012
8130940 Echo detection Mar. 6, 2012
8094809 Frame-based level feedback calibration system for sample-based predictive clipping Jan. 10, 2012
8090078 Systems and methods for half-duplex speakerphones and other two-way communication devices Jan. 3, 2012
8081752 Method and apparatus for reducing crosstalk between digital subscriber lines Dec. 20, 2011
8077642 Methods and apparatus for signal echo cancellation and transmitter calibration in full duplex systems Dec. 13, 2011
8023641 Spectral domain, non-linear echo cancellation method in a hands-free device Sep. 20, 2011
7920696 Method and device for changing to a speakerphone mode Apr. 5, 2011
7860236 Method and system for echo cancellation in a network switch Dec. 28, 2010
7826801 Adaptive forward error corrector and method thereof, and TDD radio repeating apparatus using the same Nov. 2, 2010
7822192 Sound event processing with echo analysis Oct. 26, 2010
7796767 Howling detection method, device, and acoustic device using the same Sep. 14, 2010
7760887 Updating modeling information based on online data gathering Jul. 20, 2010
7680285 Adaptive estimation and compensation of clock drift in acoustic echo cancellers Mar. 16, 2010

1 2 3 4 5 6










 
 
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