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Class Information
Number: 455/570
Name: Telecommunications > Transmitter and receiver at same station (e.g., transceiver) > Radiotelephone equipment detail > Hands-free or loudspeaking arrangement > Noise suppression or echo cancellation
Description: Subject matter wherein any undesired electrical disturbance occurring in signal paths between loudspeaker and microphone circuitry is reduced or prevented.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8694059 Mobile communication device and echo cancellation method Apr. 8, 2014
8682250 Noise cancellation system Mar. 25, 2014
8682268 Noise suppression Mar. 25, 2014
8682384 Mobile terminal, and volume adjusting method and device thereof Mar. 25, 2014
8666091 Method for reducing a disturbance in an input signal caused by an output signal in a multi-port connector, multi-port connector, and mobile device Mar. 4, 2014
8655418 Method and apparatus for a frequency domain echo suppression filter Feb. 18, 2014
8638836 Transmitter signal injection compensation Jan. 28, 2014
8634783 Communication device with reduced noise speech coding Jan. 21, 2014
8630685 Method and apparatus for providing sidetone feedback notification to a user of a communication device with multiple microphones Jan. 14, 2014
8620388 Noise suppressing device, mobile phone, noise suppressing method, and recording medium Dec. 31, 2013
8600038 System and method for echo cancellation Dec. 3, 2013
8600443 Sensor network system for acquiring high quality speech signals and communication method therefor Dec. 3, 2013
8600454 Decisions on ambient noise suppression in a mobile communications handset device Dec. 3, 2013
8594744 System and methods for adaptively switching a mobile device's mode of operation Nov. 26, 2013
8588865 Method and apparatus for removing acoustic incident signal Nov. 19, 2013
8577019 Methods, apparatus and articles of manufacture to detect echo during teleconferences Nov. 5, 2013
8565699 Setting of power amplifier control voltage Oct. 22, 2013
8548533 Wireless headset having improved RF immunity to RF electromagnetic interference produced from a mobile wireless communications device Oct. 1, 2013
8543171 Data transmission circuit and its control method Sep. 24, 2013
8538492 System and method for localized noise cancellation Sep. 17, 2013
8538037 Audio signal decorrelator, multi channel audio signal processor, audio signal processor, method for deriving an output audio signal from an input audio signal and computer program Sep. 17, 2013
8526339 Echo cancellation circuit Sep. 3, 2013
8515055 Adaptive filtering with flexible selection of algorithm complexity and performance Aug. 20, 2013
8504117 De-noising method for multi-microphone audio equipment, in particular for a "hands free" telephony system Aug. 6, 2013
8494592 Enhanced call reception and privacy Jul. 23, 2013
8489026 Systems and methods for noise cancellation and power management in a wireless headset Jul. 16, 2013
8483776 Acoustic path for a wireless communications device Jul. 9, 2013
8483775 Vehicle communication system Jul. 9, 2013
8478359 User interface tone echo cancellation Jul. 2, 2013
8462193 Method and system for processing audio signals Jun. 11, 2013
8463331 Deterministic characterization and reduction of acoustic echo Jun. 11, 2013
8457215 Apparatus and method for suppressing noise in receiver Jun. 4, 2013
8457614 Wireless multi-unit conference phone Jun. 4, 2013
RE44237 System and method for reuse of communications spectrum for fixed and mobile applications with efficient method to mitigate interference May. 21, 2013
8447595 Echo-related decisions on automatic gain control of uplink speech signal in a communications device May. 21, 2013
8433058 Method and system for distributed speakerphone echo cancellation Apr. 30, 2013
8433271 Performing impulse blanking based on blocker information Apr. 30, 2013
8428661 Speech intelligibility in telephones with multiple microphones Apr. 23, 2013
8422663 Structure and method for echo reduction without loss of information Apr. 16, 2013
8417207 High-performance cellular telephone receiver Apr. 9, 2013
8412285 Speaker module of portable terminal and method of execution of speakerphone mode using the same Apr. 2, 2013
8406822 Vehicle-state based parameter adjustment system Mar. 26, 2013
8391807 Communication device with reduced noise speech coding Mar. 5, 2013
8380253 Voice switching for voice communication on computers Feb. 19, 2013
8380254 Speaker device for a vehicle Feb. 19, 2013
8369511 Robust method of echo suppressor Feb. 5, 2013
8369901 Hands-free telephony and in-vehicle communication Feb. 5, 2013
8363761 Wireless modem and noise cancellation method for the same Jan. 29, 2013
8355515 Gaming headset and charging method Jan. 15, 2013
8346311 Audio signal processing apparatus, audio signal processing method, and communication terminal Jan. 1, 2013

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