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Class Information
Number: 379/406.01
Name: Telephonic communications > Echo cancellation or suppression
Description: Subject matter including circuitry to prevent undesired reflection, oscillation, feedback, or signal transmission.










Sub-classes under this class:

Class Number Class Name Patents
379/406.02 Combined diverse function 141
379/406.04 Disable or inhibit function 169
379/406.16 Having analog variolosser or attenuator 45
379/406.05 Residual echo cancellation 267
379/406.06 Using digital signal processing 300


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12

Patent Number Title Of Patent Date Issued
8693677 Techniques for updating filter coefficients of an adaptive filter 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
8654967 System for conditioning echo response of loop start trunk line Feb. 18, 2014
8655418 Method and apparatus for a frequency domain echo suppression filter Feb. 18, 2014
8638836 Transmitter signal injection compensation Jan. 28, 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
8619969 Adaptive integrated hybrid with complex adaptation for digital subscriber line systems Dec. 31, 2013
8620388 Noise suppressing device, mobile phone, noise suppressing method, and recording medium Dec. 31, 2013
8605891 Adaptive gain control based on echo canceller performance information Dec. 10, 2013
8594320 Hybrid echo and noise suppression method and device in a multi-channel audio signal Nov. 26, 2013
8582577 Modem with voice processing capability Nov. 12, 2013
8571204 Apparatus and method for echo control in parameter domain Oct. 29, 2013
8565414 Distributed VAD control system for telephone Oct. 22, 2013
8548089 System and method for packet communication Oct. 1, 2013
8542818 Vehicle call device, call system, center, and calling method Sep. 24, 2013
8538034 Method and arrangement for echo cancellation of voice signals Sep. 17, 2013
8526339 Echo cancellation circuit Sep. 3, 2013
8520821 Systems and methods for switching between computer and presenter audio transmission during conference call Aug. 27, 2013
8509050 Cancellation of crosstalk energy in communication loops Aug. 13, 2013
8509125 Method and apparatus for reducing nonlinear echo distortion in a communication device Aug. 13, 2013
8509450 Dynamic audibility enhancement Aug. 13, 2013
8483398 Methods and systems for reducing acoustic echoes in multichannel communication systems by reducing the dimensionality of the space of impulse responses Jul. 9, 2013
8477954 Controlling audio signals Jul. 2, 2013
8472616 Self calibration of envelope-based acoustic echo cancellation Jun. 25, 2013
8462962 Sound processor, sound processing method and recording medium storing sound processing program Jun. 11, 2013
8462193 Method and system for processing audio signals Jun. 11, 2013
8462958 Apparatus and method for computing filter coefficients for echo suppression Jun. 11, 2013
8463331 Deterministic characterization and reduction of acoustic echo Jun. 11, 2013
8457953 Method and arrangement for smoothing of stationary background noise Jun. 4, 2013
8441515 Method and apparatus for minimizing acoustic echo in video conferencing May. 14, 2013
8433074 Echo suppressing method and apparatus Apr. 30, 2013
8433058 Method and system for distributed speakerphone echo cancellation Apr. 30, 2013
8428274 Apparatus and method for detecting acoustic feedback Apr. 23, 2013
8406430 Simulated background noise enabled echo canceller Mar. 26, 2013
8406336 Communication device and receiving method thereof Mar. 26, 2013
8401201 Sound processing apparatus and method Mar. 19, 2013
8401176 Acoustic echo canceller with multimedia training signal Mar. 19, 2013
8386251 Progressive application of knowledge sources in multistage speech recognition Feb. 26, 2013
8385557 Multichannel acoustic echo reduction Feb. 26, 2013
8385558 Echo presence determination in voice conversations Feb. 26, 2013
8379800 Conference signal anomaly detection Feb. 19, 2013
8380253 Voice switching for voice communication on computers Feb. 19, 2013
8374851 Voice activity detector and method Feb. 12, 2013
8364477 Method and apparatus for increasing speech intelligibility in noisy environments Jan. 29, 2013
8364298 Filtering application sounds Jan. 29, 2013
8351597 Electronic device, echo canceling method thereof, non-transitory computer readable medium, circuit substrate, and portable telephone terminal device Jan. 8, 2013
8335330 Methods and devices for audio upmixing Dec. 18, 2012

1 2 3 4 5 6 7 8 9 10 11 12










 
 
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