Noise Suppression Or Echo Cancellation Patents (Class 455/570)
  • Patent number: 10530936
    Abstract: Systems and methods for acoustic feedback cancellation. One method includes transmitting, with a transceiver, a known full-band sequence at a first time. The method includes receiving, via a microphone, a received audio signal including a received copy of the known full-band sequence. The method includes filtering the received audio signal to generate a filtered audio signal, and detecting, based on the filtered audio signal, a second portable communication device in proximity to the portable communication device. The method includes, in response to detecting the second portable communication device, determining, based on the first time and filtered audio signal, an estimated loop delay. The method includes initializing an adaptive feedback cancellation filter based on the estimated loop delay and the plurality of estimated filter coefficients.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: January 7, 2020
    Assignee: MOTOROLA SOLUTIONS, INC.
    Inventors: Vahid Khanagha, Kurt S. Fienberg
  • Patent number: 10453470
    Abstract: A system and method for speech enhancement of a portable electronic device. Embodiments may include receiving an audio signal at a portable electronic device having a first microphone and a second microphone. Embodiments may also include receiving an input from a proximity detector associated with the portable electronic device and controlling a processing component associated with at least one of the first microphone and the second microphone based upon, at least in part, the input from the proximity detector.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: October 22, 2019
    Assignee: Nuance Communications, Inc.
    Inventors: Friedrich Faubel, Tobias Wolff, Tim Haulick
  • Patent number: 10418031
    Abstract: The present disclosure discloses a voice remote controller and a power supplying method thereof. The voice remote controller comprises: a noise gathering module for gathering ambient noise at the periphery of the voice remote controller by using a sound aperture array; a sound-electricity converting module for converting the ambient noise gathered by the noise gathering module into an electrical signal; and an energy storing module for storing the electrical signal converted by the sound-electricity converting module as electric energy and supplying power to the voice remote controller. According to the present disclosure, ambient noise is gathered by a sound aperture array and converted into electricity used as the working energy, thereby avoiding battery replacing or frequent charging. When a voice function of a voice remote controller is turned off, all of the gathered ambient noise is converted into electricity, thereby improving the energy utilization rate.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: September 17, 2019
    Assignee: Qingdao Goertek Technology Co., Ltd.
    Inventors: Xun Liu, Pengpeng Liu, Zhicheng Liu
  • Patent number: 10388273
    Abstract: Disclosed herein are system, method, and computer program product embodiments for distributed voice processing. An embodiment operates by receiving audio data from microphones associated with a plurality of devices distributed across an area of interest. A trigger word is detected in the audio data received from at least one of the devices. Responsive to detecting the trigger word, a voice command processing system associated with a multimedia device is activated. Based on the audio data received from at least two or more of the devices, a voice command associated with the multimedia device is determined. The multimedia device is controlled in accordance with the voice command.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: August 20, 2019
    Assignee: ROKU, INC.
    Inventors: Gregory M. Garner, Anthony Wood
  • Patent number: 10341532
    Abstract: An image forming apparatus that forms an output image corresponding to input image data on an image carrier by superimposing toner images of colors, includes a hardware processor that: detects color information of the output image for every pixel region; converts color information of the input image data for every pixel region and color information of the output image for every pixel region into indexes which define colors in predetermined color space coordinates; extracts a pixel region in which the color information of the output image is different from the color information of the input image data, and corrects the color information of the input image data with respect to the extracted pixel region; and stores the color information of the input image data as data for calibration in combination with the color information of the output image and image forming conditions when forming the output image.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: July 2, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Takaaki Kooriya, Daiki Yamanaka, Hiroshige Kidera
  • Patent number: 10284261
    Abstract: In accordance with one or more embodiments, an access point includes a first communication interface having: a first coupler configured to receive, via a first transmission medium, first guided electromagnetic waves from a first waveguide system of a distributed antenna system, wherein the first guided electromagnetic waves propagate along the first transmission medium without requiring an electrical return path; and also a first receiver configured to receive first data from the first guided electromagnetic waves. A data switch is configured to select first selected portions of the first data for transmission to at least one communication device in proximity to the access point.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: May 7, 2019
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Farhad Barzegar, Irwin Gerszberg, Giovanni Vannucci, Peter Wolniansky, Paul Shala Henry
  • Patent number: 10256875
    Abstract: Certain aspects of the present disclosure relate to techniques and apparatus for improving power efficiency of a wireless device. The techniques may generally include determining a modulation scheme and transmit direction for transmission of a signal using a plurality of antennas, and controlling, separately, at least one amplifier for each of the plurality of antennas, based on the determined transmit direction and modulation scheme.
    Type: Grant
    Filed: April 10, 2015
    Date of Patent: April 9, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Amichai Sanderovich, Moran Horesh
  • Patent number: 10033428
    Abstract: Embodiments of the present invention provide a method for reducing a self-interference signal in a communications system, and an apparatus. The method includes: sending a sounding signal and a first communication signal; receiving an input signal; separating a near-field reflection signal corresponding to the sounding signal from an echo signal of the input signal; determining, based on the near-field reflection signal, a near-field reflection channel parameter; determining, based on the near-field reflection channel parameter, a reconstructed near-field reflected self-interference signal; and subtracting the reconstructed near-field reflected self-interference signal from a received second communication signal. The present invention can effectively recognize and reconstruct a near-field reflection signal, thereby reducing a near-field reflected self-interference signal in self-interference.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: July 24, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Sheng Liu
  • Patent number: 10003451
    Abstract: An apparatus includes a first gain stage, a combiner and a second gain stage. The first gain stage may be configured to amplify a receive signal acquired from a circuit to generate an intermediate signal. The combiner may be configured to combine the intermediate signal with a cancellation signal to generate a combined signal. The cancellation signal is generally derived from a transmit signal a portion of which appears in the receive signal through the circuit. The second gain stage may be configured to amplify the combined signal to generate an output signal.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: June 19, 2018
    Assignee: MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.
    Inventor: David Ryan
  • Patent number: 9966086
    Abstract: A system may be configured to interact with a user through speech using a first and second audio devices, where the first device produces audio and the second device captures audio. The second device may be configured to perform acoustic echo cancellation with respect to a microphone signal based on a reference signal provided by the first device. The reference and microphone signals may have the same nominal signal rates. However, the signal rates may drift from each other over time. In order to synchronize the rates of the signals, each of the devices maintains a signal index. The second device compares the values of the two signal indexes over time to determine rate differences between the reference and microphone signals and then corrects for the rate differences.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: May 8, 2018
    Assignee: Amazon Technologies, Inc.
    Inventors: Kurt Wesley Piersol, Preethi Parasseri Narayanan, Robert Ayrapetian, Arnaud Jean-Louis Charton, Gabe Beddingfield, Michael Alan Pogue, Yuwen Su
  • Patent number: 9911309
    Abstract: A personal proximity warning device for alerting a user to an approaching object includes a housing that defines an interior space. The housing is configured to couple to an article that is coupled to a user. A power module and a transmitter are coupled to the housing and positioned in the interior space. The transmitter is operationally coupled to the power module and is configured to communicate an alert to an electronic device of the user. The electronic device is configured to audibly communicate the alert to the user through one or more speakers that are coupled to the user, such as earbuds and headphones. A sensor is coupled to the housing and operationally coupled to the power module and the transmitter. The sensor is configured to detect motion in an area proximate to the user and to compel the transmitter to communicate the alert upon detection of the motion.
    Type: Grant
    Filed: January 17, 2017
    Date of Patent: March 6, 2018
    Inventor: Randal K. Kumagai
  • Patent number: 9881632
    Abstract: A system and method that enhances speech through reinforcement includes capturing an audio signal generated by the audio sources by one or more microphones; decomposing the audio signals into a plurality of virtual audio sources where the number of audio channels delivered by the audio sources is equal to the number of the plurality of virtual audio sources; estimating the echo paths from each of the plurality of virtual audio sources to the one or more microphones; and processing the captured audio signal in response to the estimated echo paths by subtracting the echo contributions of each of the virtual sources to the one or more microphones.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: January 30, 2018
    Assignee: 2236008 Ontario Inc.
    Inventor: Mark Robert Every
  • Patent number: 9881633
    Abstract: An audio signal processing device includes: a short-time fast Fourier transform unit that generates a signal in a frequency domain obtained by performing a short-time fast Fourier transform on an input audio signal; a steady sound determining unit that determines whether a waveform of a peak portion included in a waveform of the signal in a frequency domain is a steady sound; a filter coefficient calculation unit that dynamically calculates a filter coefficient on the basis of a result of determination made by the steady sound determining unit; a comb filter that operates according to the filter coefficient calculated by the filter coefficient calculation unit so as to filter a signal in a frequency domain; and an inverse Fourier transform unit that transforms an output of the comb filter into a signal in a time domain and outputs the signal in a time domain.
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: January 30, 2018
    Assignee: P SOFTHOUSE CO., LTD.
    Inventor: Takuma Kudou
  • Patent number: 9832581
    Abstract: An electronic device includes an audio player and a processing unit. The processing unit includes a detection module, a timer module, and a control module. The detection module is used to detect an output volume produced currently when the audio player produces sound and to determine whether the output volume conforms to a volume control standard. The timer module is signally connected with the detection module and used to calculate the cumulative time during which the output volume produced by the audio player conforms to the volume control standard when the output volume conforms to the volume control standard and to determine whether the cumulative time equals the control time. The control module is signally connected with the timer module and used to control the audio player to decrease the volume of an output sound or to stop outputting sound when the cumulative time equals the control time.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: November 28, 2017
    Assignee: UNLIMITER MFA CO., LTD.
    Inventors: Kuo-Ping Yang, Neo Bob Chih-Yung Young, Kuan-Li Chao, Ming-Ren Ma, Chih-Long Chang
  • Patent number: 9781504
    Abstract: An earphone connected to a smart device is provided. The earphone connected to a smart device includes a voice signal input and output function that returns a sound generated by the smart device itself as well as a sound generated from the exterior into the smart device as a high-quality sound. The voice signal is extracted from a wire that connects the smart device and the ear receiver and inputs the extracted voice signal into the input terminal of the microphone of the smart device.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: October 3, 2017
    Assignee: RSUPPORT CO., LTD.
    Inventor: Hyungsu Seo
  • Patent number: 9774365
    Abstract: A transceiver front-end for a communication device is connectable at a signal transmission and reception arrangement node to a signal transmission and reception arrangement adapted to transmit a transmit signal having a transmit frequency and to receive a receive signal having a receive frequency. The transceiver front-end is also connectable at a transmitter node to a transmitter adapted to produce the transmit signal and at a receiver node to a receiver adapted to process the receive signal. The transceiver front-end comprises a transformer, wherein the transmitter node is connected to a first node of a first side of the transformer, the receiver node is connected to a first node of a second side of the transformer, and the signal transmission and reception arrangement node is connected to a second node of the first side of the transformer and to a second node of the second side of the transformer.
    Type: Grant
    Filed: November 22, 2012
    Date of Patent: September 26, 2017
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Carl Bryant, Jonas Lindstrand, Henrik Sjoland
  • Patent number: 9668048
    Abstract: Provided are systems and methods for contextual switching of microphones in audio devices. An example method includes detecting a change in conditions for capturing an acoustic signal by at least two microphones. A configuration is associated with the at least two microphones. The example method provides determining that the change in conditions has been stable for a pre-determined period of time. In response to the determination, the method changes the configuration associated with the at least two microphones. The conditions may include an absence or presence of far-end speech, reverberation, low/high signal-to-noise ratio, low/high signal-to-echo ratio, type of background noise, and so on. The changing of the configuration includes assigning a primary microphone and a secondary microphone based on a change in conditions. Based on the changed configuration, tuning parameters may be adjusted for noise suppression and acoustic echo cancellation.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: May 30, 2017
    Assignee: Knowles Electronics, LLC
    Inventors: Shailesh Sakri, Ajay Kumar Dhanapalan, Harsha Inna Kedage Rao
  • Patent number: 9646592
    Abstract: An apparatus comprises a dereverberation module for generating a dereverberated audio signal based on an original audio signal containing reverberation, and an audio-analysis module for generating audio analysis data based on audio analysis of the original audio signal and audio analysis of the dereverberated audio signal.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: May 9, 2017
    Assignee: Nokia Technologies Oy
    Inventors: Antti Johannes Eronen, Igor Danilo Diego Curcio, Jussi Artturi Leppänen, Elina Elisabet Helander, Victor Popa, Katariina Jutta Mahkonen, Tuomas Oskari Virtanen
  • Patent number: 9344139
    Abstract: A transceiver is disclosed comprising a transmitter; a receiver; and a signal transmission arrangement. The transmitter comprises a power amplifier, and the signal transmission arrangement is arranged to transmit signals provided from the transmitter through its power amplifier, and arranged to receive signals and provide them to the receiver. The transceiver further comprises an auxiliary power amplifier which has controllable phase shift and gain; a first impedance element; a second impedance element; and a controller.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: May 17, 2016
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Henrik Sjoland, Stefan Andersson, Imad ud Din, Johan Wernehag
  • Patent number: 9294513
    Abstract: Aspects of a method and system for providing emergency-related services via a broadband gateway are provided. In this regard, a broadband gateway may receive one or more emergency notification messages, generate one or more alert messages in response to the received emergency notification message(s), and communicate the alert message(s) to the electronic device(s). Accordingly, each of the one or more alert messages may be formatted for communication to a corresponding one or corresponding ones of the one or more electronic devices. The emergency notification message(s) may be generated by an emergency services provider in response to an emergency. The emergency services provider may send a notification message to the broadband gateway device upon determining that the broadband gateway device, a person associated with the broadband gateway device, and/or a location associated with the broadband gateway device meets particular criteria.
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: March 22, 2016
    Assignee: BROADCOM CORPORATION
    Inventors: David Lundgren, Jeyhan Karaoguz, Xuemin (Sherman) Chen, Wael William Diab, David Garrett, Rich Prodan
  • Patent number: 9282195
    Abstract: An echo canceller and an echo cancellation method are provided. The echo canceller includes a self-adaptive filter, a voice signal detection portion and a path change detection portion; a far-end voice signal is propagated in an echo path through a speaker and is picked up by a microphone to form an echo signal. The self-adaptive filter is configured to receive the far-end voice signal as a training signal to simulate the echo path, and cancel the echo signal in a near-end signal. The voice signal detection portion is configured to detect a communication status, control the self-adaptive filter according to the communication status, and control startup of the path change detection portion according to the communication status. The path change detection portion is configured to detect whether a change occurs on the echo path, and control the self-adaptive filter according to whether the change occurs on the echo path.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: March 8, 2016
    Assignee: ZTE Corporation
    Inventors: Tao Xue, Tao Sun, Dongmei Liu, Jinjun Wang, Qi Zhang, Xia Wang
  • Patent number: 9215019
    Abstract: In a method for cancelling interference caused by a terrestrial transmitter at a satellite receiver in a hybrid satellite-terrestrial network, a satellite receiver generates an interference cancellation signal based on a reference terrestrial signal from the terrestrial transmitter and a received over-the-air (OTA) signal. The satellite receiver then cancels the interference caused by the terrestrial transmitter by combining the interference cancellation signal with the received OTA signal. The interference cancellation signal is a modified version of the reference terrestrial signal.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: December 15, 2015
    Assignee: Alcatel Lucent
    Inventors: Hong Jiang, Liangkai Yu
  • Patent number: 9214913
    Abstract: A communication device (1) comprising a speaker (2), a microphone (3), a noise detection module (7) adopted to determine an ambient noise level (NL) from a microphone signal received from the microphone (3) and an automatic volume control module (4), which in dependence of a change in noise level adjusts the speaker volume level (SL) to an adjusted level during an adaption time interval (TA). The communication device (1) comprises a motion sensor (5), and the length of the adaption time interval (TA) depends on a motion signal received from the motion sensor (5).
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: December 15, 2015
    Assignee: GN Netcom A/S
    Inventor: Morten Urup
  • Patent number: 9207648
    Abstract: A watch includes a sound input body and a main body. The main body include an interface unit, a first electromagnetic coil unit, a signal processing unit, and a control unit. The sound input body includes a microphone and a second electromagnetic coil unit. The second electromagnetic coil unit generates inducted electromagnetic filed in response to an electric signal generated by the microphone. The first electromagnetic coil unit coupling the second electromagnetic coil unit generates electric signal in response to the electromagnetic field. The signal processing unit filters algorithm of the electric signal. The control unit recognizes the electric signal amplified by the signal amplification unit to execute corresponding function.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: December 8, 2015
    Assignee: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Kuang-Yao Liao, Shiang-Hua Lin
  • Patent number: 9173015
    Abstract: A microphone module has a substrate with an aperture to allow sound waves to pass through the substrate, a lid mounted to the substrate to define a first interior volume, a microphone mounted to the substrate within the first interior volume, and a housing coupled to the substrate and covering the aperture. The housing forms a second interior volume and includes an acoustic port configured to allow sound to enter the second interior volume. The module further includes a pipe extending from the acoustic port in the housing, and at least one exterior interface pad outside of the second interior volume. The pipe has an open end to receive sound waves and direct them toward the acoustic port in the housing. Moreover, the at least one exterior interface pad electrically couples to the microphone.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: October 27, 2015
    Assignee: INVENSENSE, INC.
    Inventors: Kieran P. Harney, Dipak Sengupta, Brian Moss, Alain V. Guery
  • Patent number: 9143875
    Abstract: A method comprising receiving an indication of an input indicative of the user not facing the apparatus, determining an ambient sound non-limitation directive associated with the audio uplink based, at least in part, on the input, receiving other audio information, determining ambient sound non-limited audio information based, at least in part, on the other audio information, and causing transmission of the ambient sound non-limited audio information by way of the audio uplink is disclosed.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: September 22, 2015
    Assignee: Nokia Technologies Oy
    Inventor: Koray Ozcan
  • Patent number: 9142223
    Abstract: A sound process apparatus includes a processor. The processor may execute instructions, which are stored on a memory, and when executed cause the sound process apparatus to perform operations. An obtaining operation may obtain sound data in a remote site. A first determining operation may determine volume levels of voice and noise in the remote site based on the sound data. A second determining operation may determine a volume level of noise in a local site based on the sound in the local site. A third determining operation may determine a target volume level based on the volume level of the voice in the remote site, the volume level of the noise in the remote site, and the volume level of the noise in the local site. A notifying operation may notify a user of the target volume level.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: September 22, 2015
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Mitsuaki Watanabe
  • Patent number: 9129588
    Abstract: Systems, devices, and methods for customizable reduction of perceived ambient sounds are disclosed. Customizable reduction can be achieved via an application operable in conjunction with an audio player or a headset having a microphone.
    Type: Grant
    Filed: September 15, 2012
    Date of Patent: September 8, 2015
    Assignee: Definitive Technology, LLC
    Inventor: Matthew Lyons
  • Patent number: 9112951
    Abstract: A controller for an echo suppressor configured to suppress a residual echo of a far-end signal included in a primary error signal, the controller adapted for operation with a primary adaptive filter configured to form a primary echo estimate of the far-end signal included in a microphone signal and an echo canceller configured to cancel that primary echo estimate from the microphone signal so as to form the primary error signal, the controller comprising: a secondary adaptive filter configured to form a secondary echo estimate of the far-end signal comprised in the microphone signal; and control logic operable in at least two modes selected in dependence on a convergence state of the primary adaptive filter, the control logic being configured to control activation of the echo suppressor in dependence one or more transient or steady state decision parameters.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: August 18, 2015
    Assignee: Imagination Technologies Limited
    Inventors: Senthil Kumar Mani, Gandhi Namani
  • Patent number: 9054665
    Abstract: A method of removing a signal from among received signals, the method including: filtering the received signals; detecting a time band of the filtered received signals where an energy value of the filtered received signals exceeds a reference energy value; and applying a gain value to one or more received signals, from among the received signals, in the detected time band.
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: June 9, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Beak-kwon Son, Dong-won Lee, Jae-Hyun Kim, Sang-ki Kang
  • Patent number: 9042567
    Abstract: An acoustic echo cancellation (AEC) system includes a remote device, for capturing a remote captured sound, a server coupled to the remote device, and a local device coupled to the server. The server transmits the remote captured sound from the remote device to the local device. The local device receives, stores and plays the remote captured sound as a local playback sound. An echo is generated from reflection of the local playback sound. The local device captures the echo and a local sound into a local captured sound, and transmits both the remote captured sound and the local captured sound to the server. The server performs AEC on the local captured sound by using the remote captured sound from the local device and transmits the AEC processed local captured sound to the remote device.
    Type: Grant
    Filed: March 17, 2013
    Date of Patent: May 26, 2015
    Assignee: QUANTA COMPUTER INC.
    Inventors: Kuo-Chun Huang, Kai-Ju Cheng, Rong-Quen Chen, Shih-Hsiang Lo
  • Patent number: 9031620
    Abstract: A second microphone device of a mobile terminal, and more particularly, a second microphone device of a mobile terminal for preventing various limitations caused by mounting of a second microphone, is provided. The second microphone device includes an ear jack connector having an insertion space, a microphone hole connected at one end to the insertion space, and a second microphone connected at the other end of the microphone hole, thereby improving ambient noise removal performance of the mobile terminal without adversely affecting its appearance.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: May 12, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Young Jae Ko, Min Seok Kim, Jin Hong Park
  • Publication number: 20150126255
    Abstract: A universal reconfigurable system and method are provided for reducing nonlinear echo and residual echo, and for echo leakage prevention in various time-varying and complex environments is proposed in this invention. According to one embodiment an echo cancellation system includes (1) an adaptive linear filter implemented in either time-domain or frequency-domain; (2) a nonlinear echo suppression; (3) echo leakage prevention; (4) direct current (DC), low frequency residual echo and noise reduction; (5) time-domain nonlinear processor (NLP) to reduce the residual echo; and (6) frequency-domain NLP to further reduce the residual echo. The echo cancellation system is universally applicable to acoustic echo cancellation (AEC) and/or electrical echo cancellation applications. In terms of AEC, this invention is reconfigurable for one or more microphones and/or one or more reference channels. The numbers of microphones and reference channels are user configurable.
    Type: Application
    Filed: April 30, 2013
    Publication date: May 7, 2015
    Applicant: Creative Technology Ltd
    Inventors: Jun Yang, Ian Minett, Robert Ridder, Steven Verity
  • Patent number: 9015338
    Abstract: A method and apparatus for suppressing silence frames in a stream of media includes receiving a stream of media from a user and suppressing at least one silence frame from the received stream of media. The suppressed silence frame includes an initial silence frame situated before a first media frame and/or a silence frame situated between two successive media frames.
    Type: Grant
    Filed: July 23, 2003
    Date of Patent: April 21, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Ben Saidi, Mark Lindner
  • Patent number: 8995309
    Abstract: An outdoor unit includes: a transmitting module configured to transmit a signal; a splitter module configured to split the signal into two branches, where one branch is input into a amplifier, and the other branch is input into a duplexer; and the amplifier is configured to amplify the signal from the splitter module; the duplexer is configured to filter the signal from the splitter module and then output the signal to an antenna, and filter an external signal received by the antenna and then output the external signal to a combining module; the combining module is configured to combine the signal output by the amplifier with the signal output by the duplexer, and then output a combined signal to a receiving module; and the receiving module is configured to receive the combined signal output by the combining module.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: March 31, 2015
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yingdong Ma, Lin Huang, Songlin Shuai, Hua Cai
  • Patent number: 8996048
    Abstract: The present invention concerns a method for controlling the interferences generated by radio signals transferred by or to wireless telecommunication devices of a wireless cellular telecommunication network. The method comprises the steps of: forming at least one group of wireless telecommunication devices, allocating at least one identifier to each wireless telecommunication device of the group, the at least one identifier, said as group identifier, being allocated to each wireless telecommunication device of the group of wireless telecommunication devices, the group identifier being intended to be transferred by each wireless telecommunication device to mobile terminals in parallel with another identifier, allocating the same parameters for controlling the interferences generated by radio signals transferred to or by each wireless telecommunication device of the group.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: March 31, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Loic Brunel, Nicolas Gresset
  • Patent number: 8989323
    Abstract: An outdoor radio communication system comprises a first radio unit, a second radio unit, and a single cable coupling the first radio unit to the second radio unit. Each radio unit includes a downconverter, a radio processor that is communicatively coupled to the downconverter, and a XPIC module. The cable further includes a first twisted-pair of wires for communicatively coupling the first downconverter to the second XPIC module and a second twisted-pair of wires for communicatively coupling the second downconverter to the first XPIC module. The first XPIC module generates a first reference signal using a signal from the second downconverter to cancel cross-polarization interference in an output signal of the first radio processor. Similarly, the second XPIC module generates a second reference signal using a signal from the first downconverter to cancel cross-polarization interference in an output signal of the second radio processor.
    Type: Grant
    Filed: September 21, 2012
    Date of Patent: March 24, 2015
    Assignee: ZTE (USA) Inc.
    Inventors: Dong Hong Yom, Ying Shen
  • Patent number: 8977226
    Abstract: A mobile terminal including a transceiver having a plurality of output terminals; a plurality of power amplifier units respectively connected to the plurality of output terminals, and configured to amplify a first or second signal output by the output terminals and to output the amplified first or second signal to a plurality of antennas respectively connected the plurality of power amplifiers; and a receiving module configured to receive a third signal through a receiving antenna disposed to be spaced apart from the plurality of antennas and to output the received third signal to the transceiver. Further, the receiving module includes first and second filters configured to control an intermodulation distortion (IMD) signal included in the third signal due to the output of the first or second signal.
    Type: Grant
    Filed: January 2, 2013
    Date of Patent: March 10, 2015
    Assignee: LG Electronics Inc.
    Inventor: Hoonyong Kim
  • Patent number: 8976956
    Abstract: Systems and methods for removing noise from an audible signal are provided. More particularly, a vibration sensor is used to obtain a vibration signal from an environment including a communication device. The signal from the vibration sensor is combined with a signal from a microphone associated with the communication device, to create a modified audible signal. More particularly, a filtering or subtraction process can be performed with respect to the audible signal, at a time corresponding to an event detected as part of the vibration signal. The resulting modified audible signal can have reduced noise as compared to the original audible signal.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: March 10, 2015
    Assignee: Avaya Inc.
    Inventors: Paul Roller Michaelis, David S. Mohler
  • Patent number: 8963750
    Abstract: There is described a time-to-digital conversion scheme using an arrangement of delay elements based Time-to-Digital Converter, TDC (20), wherein dithering is built in the digital domain and introduced in the analog domain as a modulation of a supply voltage (TDC-supply) supplying delay elements of the TDC, each having a propagation delay which exhibits a dependency to their supply voltage.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: February 24, 2015
    Assignee: Asahi Kasei Microdevices Corporation
    Inventors: David Canard, Julien Delorme
  • Publication number: 20150050967
    Abstract: A controller for the conference session receives at least one audio signal to generate a speaker signal. The controller correlates the speaker signal with network timing information and generates speaker timing information. The controller transmits the correlated speaker signal and timing information to a mobile device participating in the conference session. The mobile device generates an echo cancelled microphone signal from a microphone of the mobile device, and transmits the echo cancelled signal back to the controller. The controller also receives array microphone signals associated with an array of microphones at known positions in the room. The controller removes acoustic echo from the array microphone signals, and estimates a relative location of the mobile device. The controller dynamically selects as audio output corresponding to the mobile device location either (a) the array microphone signal, or (b) the echo cancelled microphone signal from the mobile device.
    Type: Application
    Filed: August 15, 2013
    Publication date: February 19, 2015
    Applicant: Cisco Technology, Inc
    Inventors: Feng Bao, Subrahmanyam Venkata Kunapuli, Fei Yang, Tor A. Sundsbarm
  • Patent number: 8953812
    Abstract: Improvements in voice signals transmitted within communication systems are obtained by use of adaptive filters, front and rear microphones, noise cancelling systems and other means and methods. Disclosed embodiments include the use of directional microphones, primary inputs, secondary inputs, adaptive weight generators, canceller outputs to improve signal to noise ratios and other communication attributes.
    Type: Grant
    Filed: July 20, 2013
    Date of Patent: February 10, 2015
    Inventor: Alon Konchitsky
  • Patent number: 8948407
    Abstract: A personal audio device, such as a wireless telephone, includes noise canceling circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone may also be provided proximate the speaker to measure the output of the transducer in order to control the adaptation of the anti-noise signal and to estimate an electro-acoustical path from the noise canceling circuit through the transducer. A processing circuit that performs the adaptive noise canceling (ANC) function also either adjusts the frequency response of the anti-noise signal with respect to the reference microphone signal, and/or by adjusting the response of the adaptive filter independent of the adaptation provided by the reference microphone signal.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: February 3, 2015
    Assignee: Cirrus Logic, Inc.
    Inventors: Jeffrey Alderson, Nitin Kwatra, Gautham Devendra Kamath, Ali Abdollahzadeh Milani, John L. Melanson
  • Patent number: 8934945
    Abstract: A voice communication end device performs quality checks to determine whether acoustic echo cancellation would be ineffective, such as due to noise or clock drift or discontinuities between incoming and outgoing voice channels. In the case where echo cancellation would prove ineffective, the device falls back on a tri-state voice switching operation that includes a bi-direction state in which both channels are on in full duplex operation, which provides a smoother transition switching between active channels. The tri-state voice switching supports both voluntary transitions where the active user voluntarily stops to yield the active channel, and forced transitions where the active user is forcedly interrupted by the other user speaking more loudly.
    Type: Grant
    Filed: February 11, 2013
    Date of Patent: January 13, 2015
    Assignee: Microsoft Corporation
    Inventors: Qin Li, Chao He
  • Patent number: 8934620
    Abstract: Methods and devices for improved echo cancellation in high noise environments, such as in-car speakerphones and the like, are provided that improve cancellation convergence in a high noise environment and in the presence of double talk. A new update method enables a robust echo canceller to update with reduced concern for the canceller being in a receive state or a double talk state. If a signal generated by a local talker is substantially the same as high noise, in terms of corruption of the echo canceller, the echo canceller converges in a robust manner even with continuous high noise at the input.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: January 13, 2015
    Assignee: Cogent Signals, Inc.
    Inventor: David Lee Rowley
  • Publication number: 20150011266
    Abstract: The application relates to a communication device, e.g. a speakerphone, comprising a microphone signal path, MSP, and a loudspeaker signal path, SSP, the microphone signal path comprising a microphone unit, an MSP-filter, and a transmitter unit operationally connected to each other and configured to transmit a processed signal originating from an input sound picked up by the microphone, the loudspeaker signal path comprising a receiver unit, an SSP-filter, and a loudspeaker unit operationally connected to each other and configured to provide an acoustic sound signal originating from a signal received by the receiver unit. The communication device comprises a control unit for dynamically controlling the filtering characteristics of the MSP and SSP-filters based on one or more control input signals. This has the advantage of providing a simple and flexible scheme for decreasing echo in a communication device, while ensuring an acceptable sound quality in the transmitted signal.
    Type: Application
    Filed: July 3, 2014
    Publication date: January 8, 2015
    Inventors: Svend FELDT, Adam DYRBY, Stig PETRI
  • Publication number: 20140357322
    Abstract: A system performs residual echo suppression on a microphone signal that receives, e.g., voice commands, and that is exposed to echo from multiple speakers. An example is a smartphone that receives voice commands while the smartphone is playing music through stereo speakers. The system estimates residual echo level in different ways, and determines which estimate to use. The technique responds well to the difficult to handle scenario of a spatially quiescent image suddenly transitioning to a spatially rich image. Even in the face of such difficult scenarios, the system detects and removes residual echo from the microphone signal, instead of allowing the undesired residual echo to pass through.
    Type: Application
    Filed: July 18, 2013
    Publication date: December 4, 2014
    Inventors: Franck Pascal Beaucoup, Aleksander Radisavljevic
  • Publication number: 20140357323
    Abstract: Echo removal techniques are described. An echo path of the echo in a received audio signal is modelled using a first model to determine a first model estimate of the echo. The first model estimate is used to determine a first performance value according to a performance metric. The first performance value is compared with a threshold value. It is determined if the echo path can be deemed linear based on the comparison. If so, the first model estimate of the echo is used to remove the echo in the received audio signal. Otherwise, the echo path of the echo is switched to be modelled using a second model to determine a second model estimate of the echo, and the second model estimate of the echo is used to remove the echo in the received audio signal.
    Type: Application
    Filed: August 28, 2013
    Publication date: December 4, 2014
    Applicant: Microsoft Corporation
    Inventor: Per Ahgren
  • Publication number: 20140357326
    Abstract: An echo path of the echo in a received audio signal is modelled using an adaptive model to determine an adaptive model estimate of the echo. The adaptive model estimate is used to determine an estimate of the echo power of the echo in the received audio signal. The power of the received audio signal is determined. The estimate of the echo power and the determined power of the received audio signal are used to determine echo suppression gains. Temporal smoothing is applied to one or more of the echo suppression gains and the one or more smoothed echo suppression gains are used to apply echo suppression to the received audio signal, thereby suppressing the echo in the received audio signal, wherein the amount of smoothing applied to the echo suppression gains is varied according to a non-decreasing function of the frequency of the received audio signal.
    Type: Application
    Filed: August 30, 2013
    Publication date: December 4, 2014
    Applicant: Microsoft corporation
    Inventor: Per Ahgren
  • Publication number: 20140357325
    Abstract: Echo removal techniques are described. As part of the echo removal, a first model estimate of the echo in the received audio signal is determined using a first model and a second model estimate of the echo is determined using a second model. A first accuracy value of the first model is determined according to a model accuracy measure, and a second accuracy value of the second model is determined according to the model accuracy measure. It is then determined if the first model is more accurate than the second model based on a comparison of the first accuracy value and the second accuracy value and the second model is selectively updated based on said comparison. Echo removal is applied to the received audio signal using only the second model estimate of the echo.
    Type: Application
    Filed: August 28, 2013
    Publication date: December 4, 2014
    Applicant: Microsoft Corporation
    Inventor: Per Ahgren