In Multiple Frequency Bands Patents (Class 381/94.3)
  • Patent number: 10909977
    Abstract: A disclosed method includes monitoring an audio signal energy level while having a plurality of signal processing components deactivated and activating at least one signal processing component in response to a detected change in the audio signal energy level. The method may include activating and running a voice activity detector on the audio signal in response to the detected change where the voice activity detector is the at least one signal processing component. The method may further include activating and running the noise suppressor only if a noise estimator determines that noise suppression is required. The method may activate and runs a noise type classifier to determine the noise type based on information received from the noise estimator and may select a noise suppressor algorithm, from a group of available noise suppressor algorithms, where the selected noise suppressor algorithm is the most power consumption efficient.
    Type: Grant
    Filed: May 11, 2018
    Date of Patent: February 2, 2021
    Assignee: Google Technology Holdings LLC
    Inventors: Plamen A. Ivanov, Kevin J. Bastyr, Joel A. Clark, Mark A. Jasiuk, Tenkasi V. Ramabadran, Jincheng Wu
  • Patent number: 10896813
    Abstract: When conducting imaging mass analysis for a region to be measured on a sample, an individual reference value calculating part obtains a maximum value in Pi/Ii of respective measuring points, and stores the value together with measured data as an individual reference value. When performing comparison analysis for a plurality of the data obtained from different samples, a common reference value determining part reads out corresponding a plurality of the individual reference values and determines a minimum value as a common reference value Fmin. A normalization calculation processing part normalizes the respective intensity values by multiplying the intensity values read out from an external memory device by a normalization coefficient long_Max×(Fmin/Pi) obtained from the common reference value Fmin, TIC values Pi at the respective measuring points, and a maximum allowable value long_Max of a variable storing the intensity values at the time of operation.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: January 19, 2021
    Assignee: Shimadzu Corporation
    Inventors: Masahiro Ikegami, Shigeki Kajihara
  • Patent number: 10878834
    Abstract: Sound signal processing apparatuses and methods of operating the same are provided. The sound signal processing apparatus includes: a band separator configured to separate sound signals into frequency bands; an adder configured to add sound signals; and a signal processor that is arranged between the band separator and the adder and comprises a plurality of signal processing blocks. The band separator includes elements for separating the sound signals into frequency bands, and the elements correspond one to one to the signal processing blocks.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: December 29, 2020
    Assignee: SAMSUNG ELECTRONICS CO.. LTD.
    Inventors: Cheheung Kim, Sungchan Kang, Sangha Park, Yongseop Yoon, Choongho Rhee, Hyeokki Hong
  • Patent number: 10861473
    Abstract: The present disclosure relates to processing a plurality of audio signals. The method includes receiving the plurality of audio signals in the frequency domain and determining an overall attenuation multiplier based on the plurality of audio signals and an overall lookup table that relates decibel values to different overall attenuation multipliers. The method further includes determining an attenuation vector comprising a plurality of bin-specific attenuation multipliers, each bin-specific attenuation multiplier respectively corresponding to a different frequency bin of the plurality of frequency bins. The method further includes scaling each bin-specific attenuation value in the attenuation vector with the overall attenuation multiplier, and editing each of the audio signals based on the scaled bin-specific attenuation values in the attenuation vector.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: December 8, 2020
    Assignee: GoPro, Inc.
    Inventors: Joyce Gorny, Erich Tisch, Per Magnus Fredrik Hansson
  • Patent number: 10839823
    Abstract: A sound source separating device includes: a signal acquiring unit that acquires the sound signal including mixed sounds from a plurality of sound sources; a start information acquiring unit that acquires start information representing a start timing of at least one sound source among the plurality of sound sources; and a sound source separating unit that separates a specific sound source from the sound signal by setting a binary mask controlling presence of the sound source using a variable of “0” and “1” and using a Markov chain for the activation on the basis of the start information and decomposing the spectrogram generated from the sound signal into the base spectrum and the activation through non-negative matrix factorization using the set binary mask S.
    Type: Grant
    Filed: February 13, 2020
    Date of Patent: November 17, 2020
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Kazuhiro Nakadai, Yuta Kusaka, Katsutoshi Itoyama, Kenji Nishida
  • Patent number: 10827263
    Abstract: A system and method for adaptive beamforming, which is configured to process at least two input signals and to provide an output signal, wherein a first input signal of the at least two input signals includes a desired signal as a main component and a second input signal of the at least two input signals, include an undesired signal as main component, includes adaptive error processing the second input signal and at least one of the first input signal and the output signal to provide an estimated undesired signal representative of an estimate of undesired signal components included in the first input signal, and taking the difference between the estimated undesired signal and the first input signal to provide the output signal.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: November 3, 2020
    Assignee: Harman Becker Automotive Systems GmbH
    Inventor: Markus Christoph
  • Patent number: 10811033
    Abstract: Apparatuses and methods for transforming a signal from a vibration sensor into an approximation of a signal from a microphone are disclosed. The vibration sensor signal may be transformed by first obtaining a smooth average spectrum and corresponding deviation data for the vibration sensor signal. The smooth average spectrum may be passed through a mapping neural network to obtain a transformed smooth average spectrum that approximates a smooth average spectrum that would be obtained from a microphone. The transformed signal is then obtained by recombining the transformed smooth average spectrum with the deviation data.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: October 20, 2020
    Assignee: Intel Corporation
    Inventors: Hector Alfonso Cordourier Maruri, Jonathan Huang, Paulo Lopez Meyer, Julio Cesar Zamora Esquivel, Jose Rodrigo Camacho Perez
  • Patent number: 10755728
    Abstract: A system configured to improve noise cancellation by using portions of multiple reference signals instead of using a complete reference signal. The system divides a frequency spectrum into frequency bands and selects a single reference signal from a group of potential reference signals for every frequency band. For example, a first reference signal is selected for a first frequency band while a second reference signal is selected for a second frequency band. The system may generate a combined reference signal using portions of each of the selected reference signals, such as a portion of the first reference signal corresponding to the first frequency band and a portion of the second reference signal corresponding to the second frequency band. Additionally or alternatively, the system may perform noise cancellation using each of the selected reference signals and filter the outputs based on the corresponding frequency band to generate combined audio output data.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: August 25, 2020
    Assignee: Amazon Technologies, Inc.
    Inventors: Robert Ayrapetian, Trausti Thor Kristjansson, Philip Ryan Hilmes
  • Patent number: 10750251
    Abstract: Provided is an information providing apparatus (10) including a reliability determination unit (11) that determines a reliability of an inference result obtained by inferring an operation state of a monitored electric device group, on the basis of time-series measurement data and training data, the time-series measurement data including any one of current consumption and power consumption of the monitored electric device group and the training data associating each of a plurality of the operation states which can be assumed by the electric device group with a feature value of each of the plurality of operation states, and an output unit (12) that outputs information related to the reliability.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: August 18, 2020
    Assignee: NEC CORPORATION
    Inventors: Takahiro Toizumi, Ryota Suzuki, Eisuke Saneyoshi, Shigeru Koumoto
  • Patent number: 10740728
    Abstract: Computer-based access security includes executing a system-level boot process, by a processor configured with a computing device, as a function of at least boot code, and storing, as a function of at least one operating system kernel, a value representing a time at or near completion of the system-level boot process. The security further includes receiving, as a function of a capacitive touch screen, an electrical charge operable to cause a measurable drop in voltage. Thereafter, the security includes generating, as a function of the measured voltage drop, an image. Moreover, the security includes storing the image to processor readable media configured with the computing device, wherein storing the image includes: determining a value representing an amount of time calculated from the time of completion of the system-level boot process; and associating the value representing the amount of time with the image.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: August 11, 2020
    Assignee: INNOVATE CARE LLC
    Inventor: Yoel Gabay
  • Patent number: 10671341
    Abstract: Methods and apparatus for configuring a portable communication device are disclosed. The methods include receiving an incoming audio signal, adjusting the incoming signal audio level based on a volume control setting, generating an ultrasonic audio signal having an audio level independent of the volume control setting, mixing the incoming signal with the ultrasonic signal to generate a mixed audio signal, outputting the mixed signal to a remote audio device, receiving a remote audio signal from the remote device, and comparing the remote signal audio level to one or more thresholds to determine whether to output a compensated audio signal to a speaker. The remote signal may be detected by the remote device in response to sound output from the remote device based on the mixed signal, and the compensated signal audio signal may be adjusted based on an estimated loss in loudness associated with the remote signal audio level.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: June 2, 2020
    Assignee: Motorola Solutions, Inc.
    Inventors: Nissim Gean, Haim Kahlon, Hadi Shvartz, Felix Barmoav
  • Patent number: 10621971
    Abstract: Embodiments of the present disclosure provide a method and a device for extracting a speech feature based on artificial intelligence. The method includes performing a spectrum analysis on a speech to be recognized, to obtain a spectrum program of the speech; and extracting features of the spectrum program by using an Inception convolution structure of an image recognition algorithm, to obtain the speech feature of the speech. In embodiments, by performing the spectrum analysis on the speech to be recognized, the consecutive speech to be recognized is converted into the spectrum diagram. As the Inception convolution structure is an effective image recognition manner being able to accurately recognize features of an image, the spectrum program is recognized with the Inception convolution structure to extract the relative accurate speech feature from the speech to be recognized. Thus, the accuracy rate of the speech recognition is improved.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: April 14, 2020
    Assignee: BAIDU ONLINE NETWORK TECHNOLOGY (BEIJING) CO., LTD.
    Inventors: Chao Li, Xiangang Li
  • Patent number: 10614788
    Abstract: Systems and methods for enhancing a headset user's own voice include an outside microphone, an inside microphone, audio input components operable to receive a plurality of time-domain microphone signals, including an outside microphone signal from the outside microphone and an inside microphone signal from the inside microphone, a subband decomposition module operable to transform the time-domain microphone signals to frequency domain subband signals, a voice activity detector operable to detect speech presence and absence in the subband signals, a speech extraction module operable to predict a clean speech signal in each of the inside microphone signal and the outside microphone signal, and cancel audio sources other than a headset user's own voice by combining the predicted clean speech signal from the inside microphone signal and the predicted clean speech signal from the outside microphone signal, and a postfiltering module operable to reduce residual noise.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: April 7, 2020
    Assignee: SYNAPTICS INCORPORATED
    Inventors: Frederic Philippe Denis Mustiere, Francesco Nesta, Trausti Thormundsson
  • Patent number: 10524049
    Abstract: A signal processing unit calculates a first difference in time of arrival of sound from a sound source to a first and to a second microphone comprising a microphone array and calculates a second difference in time of arrival, which is the difference between the first difference in time of arrival and an actual time, of arrival, and determines the position of the sound source based on the sum of the first difference in time of arrival and the second difference in time of arrival.
    Type: Grant
    Filed: January 17, 2019
    Date of Patent: December 31, 2019
    Assignee: Yamaha-UC
    Inventor: Ryo Tanaka
  • Patent number: 10524202
    Abstract: Methods and circuits for reducing power dissipation in wireless transceivers and other electronic circuits and systems. Embodiments of the present invention use bias current reduction, impedance scaling, and gain changes either separately or in combination to reduce power dissipation. For example, bias currents are reduced in response to a need for reduced signal handling capability, impedances are scaled thus reducing required drive and other bias currents in response to a strong received signal, or gain is increased and impedances are scaled in response to a low received signal in the presence of no or weak interfering signals.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: December 31, 2019
    Assignee: THETA IP, LLC
    Inventor: Yannis Tsividis
  • Patent number: 10516941
    Abstract: Wind noise reduction is provided by obtaining a first signal from a first microphone and a contemporaneous second signal from a second microphone. A level of the first signal is compared to a level of the second signal, within a short or substantially instantaneous time frame. If the level of the first signal exceeds the level of the second signal by greater than a predefined difference threshold, a suppression is applied to the first signal.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: December 24, 2019
    Assignee: Cirrus Logic, Inc.
    Inventors: Henry Chen, Thomas Ivan Harvey
  • Patent number: 10452986
    Abstract: Apparatus, methods and programs for estimating a parameter for modeling a time series signal with stochastic dynamics model, A method for obtaining data representing the mixed signals of two or more time series signals; estimating a parameter for modeling a time series signal with stochastic dynamics model. The present technology relates to a data processing apparatus, a data processing method, and a program.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: October 22, 2019
    Assignee: Sony Corporation
    Inventors: Masato Ito, Kohtaro Sabe
  • Patent number: 10453473
    Abstract: An apparatus and method for reducing background noise captured by a UAV acoustic sensor are disclosed. The background noise may be reduced by incorporating a known UAV acoustic signature corresponding to a determined flight parameter into an adaptive filter coupled to the acoustic sensor.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: October 22, 2019
    Assignee: AirShare, Inc.
    Inventors: Richard Jonathan Whittaker, Tariq Sigouin
  • Patent number: 10454439
    Abstract: The invention relates to methods and apparatus for adjusting a level of an audio signal. An audio signal is divided into a plurality of frequency bands. Modification parameters are obtained for at least one of the plurality of frequency band. Gain factors are derived for at least one of the plurality of frequency bands, the gain factors determined based on the amplitude scale factors. The gain factors are smoothed. A level of noise from noise compensation factors is determined. The gain factors are applied to at least one of the frequency bands to generate gain adjusted frequency bands. The level of noise is adjusted based on the gain adjusted frequency bands. At least one of the frequency bands is filtered with a filter generated with the filter coefficients. The plurality of frequency bands is synthesized to generate an output audio signal.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: October 22, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Alan Jeffrey Seefeldt
  • Patent number: 10446169
    Abstract: A method for controlling echo of a voice recognition system includes receiving at least two audio input signals corresponding to sound sensed by at least two microphones in a physical space. A first audio input signal of the at least two audio input signals is received on a primary channel, and each remaining audio input signal is received through a respective secondary channel. The method includes selecting, by a processor, based on an echo power level of a speaker in the physical space, a subset of echo control functions (ECFs) from among a plurality of ECFs of a multistage echo control system. Each ECF modifies the at least two audio input signals to reduce echo. The method includes generating a corresponding number of audio output signals by processing the signals received on the primary and secondary channels through the selected subset of ECFs, and outputting the audio output signals.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: October 15, 2019
    Assignee: Motorola Mobility LLC
    Inventors: Pratik M. Kamdar, Jincheng Wu, Joel A. Clark
  • Patent number: 10311881
    Abstract: Disclosed methods and apparatuses determine an inter-channel time difference of a multi-channel audio signal by determining a set of local maxima of a cross-correlation function involving at least two different channels of the multi-channel audio signal, for positive and negative time-lags and associating each local maximum with a corresponding time-lag. Local maximums for the positive and negative time-lags are selected from the set as respective positive and negative time-lag inter-channel correlation candidates. Processing also includes evaluating whether there is an energy-dominant channel, when the absolute value of a difference in amplitude between the inter-channel correlation candidates is smaller than a first threshold, and, when there is an energy-dominant-channel, identifying the sign of the inter-channel time difference and extracting a current value of the inter-channel time difference based on the time-lag corresponding to the positive or negative time-lag inter-channel correlation candidate.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: June 4, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Manuel Briand, Tomas Jansson Toftgård
  • Patent number: 10284728
    Abstract: Devices and methods for howling suppression. One method includes receiving, via a microphone, an acoustic signal from a communication device operating in an acoustic field with the microphone. The method includes determining a reflection pattern for the acoustic field based on the acoustic signal, and determining an acoustic characteristic for the acoustic field based on the reflection pattern. The method includes determining, based on the acoustic characteristic, a plurality of howling zones for the acoustic field, each zone defined by first and second proximity thresholds. The method includes, for each of the howling zones, determining an attenuation level for the zone based on the proximity thresholds and the acoustic characteristic. The method includes determining a distance between the microphone and the communication device, selecting one of the howling zones based on the distance, and adjusting a volume of a loudspeaker based on the attenuation level for the selected howling zone.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: May 7, 2019
    Assignee: MOTOROLA SOLUTIONS, INC.
    Inventors: Nissim Gean, Pavel Livshits, Bar Yamin
  • Patent number: 10283137
    Abstract: A device (160) and a method are proposed for tuning a frequency-dependent attenuation stage (122), with the purpose of suppressing non-linear distortion occurring in an audio reproduction system (120) associated with the frequency-dependent attenuation stage. The device comprises a receiving section (162) adapted to receive data representing an output acoustic signal (140) from the audio reproduction system, recorded upon excitation of the audio reproduction system by a predetermined input data signal (110)a first distortion detection section (163) adapted to detect presence of non-linear distortion based on the received data and to apply psycho-acoustic compensation to the detected non-linear distortion and a control section (164) adapted to determine, based on the psycho-acoustically compensated non-linear distortion, control information (170) suitable for controlling the frequency-dependent attenuation stage.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: May 7, 2019
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Jyri Tapani Pakarinen, Michael Smithers, Juan Felix Torres, Heiko Purnhagen
  • Patent number: 10283140
    Abstract: Systems and methods for enhancing reverberated audio signals are disclosed. In one embodiment, a method is disclosed comprising receiving an audio signal; partitioning a frequency domain representation of the audio signal into a plurality of sub-band vectors; inputting each sub-band vector into a corresponding deep neural network; calculating, using the corresponding deep neural networks, a plurality of output vectors for each sub-band; concatenating the plurality of output vectors to generate a clean audio feature matrix; and converting the clean audio feature matrix into a time-domain audio signal.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: May 7, 2019
    Assignee: ALIBABA GROUP HOLDING LIMITED
    Inventors: Tao Yu, Ming Tu, Gang Liu
  • Patent number: 10264354
    Abstract: Information from microphone signals from a microphone array may be used to identify persistent sources, such as televisions, radios, washing machines, or other stationary sources. Values representative of broadside conditions for each pair of microphone signals are received from the microphone array. By monitoring broadside conditions for microphone pairs, a position of a sound source may be identified. If a sound source is frequently identified with a broadside of the same microphone pair, then that sound source may be identified as a persistent noise source. When a broadside of a pair of microphones is identified with a noise source, a beamformer may be configured to decrease contribution of that pair of microphones to an audio signal formed from the microphone array.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: April 16, 2019
    Assignee: Cirrus Logic, Inc.
    Inventor: Khosrow Lashkari
  • Patent number: 10257620
    Abstract: The present invention proposes a method for providing at least one indication regarding whether an input signal contains a tonal signal component. The proposed method comprises decomposing the input signal into a plurality of band-limited input signals and then for each of one or more of the plurality of band-limited input signals performing the following step: estimating parameters of a parametric tonal signal model adapted to model and predict a tonal-only signal component of a selected one of the one or more of the plurality of band-limited input signals; synthesizing based on the estimated parameters a corresponding predicted band-limited input signal; and determining a measure of mismatch between the selected band-limited input signal and the corresponding predicted band-limited input signal. Subsequently, the at least one indication is provided based on the measure of mismatch determined for at least one of the one or more of the plurality of band-limited input signals.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: April 9, 2019
    Assignee: Sonova AG
    Inventor: Jean-Louis Durrieu
  • Patent number: 10242658
    Abstract: A system for self-organized acoustic signal cancellation over a network is disclosed. The system may transmit an acoustic sounding signal to an interfering device so that a channel measurement may be performed for a channel between the interfering device and an interferee device. The system may receive the channel measurement for the channel from the interfering device and also receive a digitized version of an audio interference signal associated with the interfering device. Based on the channel measurement and the digital version of the interference signal, the system may calculate a cancellation signal prior to the arrival of the original over-the-air audio interference signal that corresponds to the digital version of audio interference signal. The system may then apply the cancellation signal to an audio signal associated with the interferee device to remove the interference signal from the audio signal.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: March 26, 2019
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Lusheng Ji, Donald J. Bowen, Dimitrios B. Dimitriadis, Horst J. Schroeter
  • Patent number: 10229697
    Abstract: One method of operation includes beamforming a plurality of microphone outputs to obtain a plurality of virtual microphone audio channels. Each virtual microphone audio channel corresponds to a beamform. The virtual microphone audio channels include at least one voice channel and at least one noise channel. The method includes performing voice activity detection on the at least one voice channel and adjusting a corresponding voice beamform until voice activity detection indicates that voice is present on the at least one voice channel. Another method beamforms the plurality of microphone outputs to obtain a plurality of virtual microphone audio channels, where each virtual microphone audio channel corresponds to a beamform, and with at least one voice channel and at least one noise channel. The method performs voice recognition on the at least one voice channel and adjusts the corresponding voice beamform to improve a voice recognition confidence metric.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: March 12, 2019
    Assignee: Google Technology Holdings LLC
    Inventors: Kevin J. Bastyr, Giles T Davis, Plamen A Ivanov, Rivanaldo S Oliveira, Tenkasi V Ramabadran, Snehitha Singaraju
  • Patent number: 10157603
    Abstract: A noise detector and a sound signal output device are provided that can detect high accuracy various types of noise including composite noise. The noise detector (30) for detecting noise contained in an input signal (s1) includes a noise discrimination portion having a plurality of discrimination portions to which an input signal is input and a noise determination portion (35) determining noise based on individual discrimination results of the plurality of discrimination portions.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: December 18, 2018
    Assignee: AUDIO-TECHNICA CORPORATION
    Inventors: Yasuhito Kikuhara, Kazuhiro Onizuka, Toru Aikawa
  • Patent number: 10154342
    Abstract: A spatial adaptation system for multiple-microphone sound capture systems and methods thereof are described. A spatial adaptation system includes an inference and weight module configured to receive a inputs. The inputs based on two or more input signals captured by at least two microphones. The inference and weight module to determine one or more weight values base on at least one of the inputs. The spatial adaptation system also including a noise magnitude ratio update module coupled with the inference and weight module. The noise magnitude ratio update module to determine an updated noise target based on the one or more weight values from the inference and weight module.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: December 11, 2018
    Assignee: Dolby International AB
    Inventor: Leif Jonas Samuelsson
  • Patent number: 10133542
    Abstract: A system comprising at least one processor; and at least one storage device. The storage device(s) store instructions that, when executed, cause the at least one processor to: prior to enabling output of an audio signal based on an audio data stream, detect, within the audio data stream, an indication of a target sound that corresponds to one of a plurality of sounds that are expected to cause distraction, replace, within the audio data stream, the indication of the target sound with an indication of a replacement sound, wherein the replacement sound is a less distracting version of the target sound, and after replacing the indication of the target sound with the indication of the replacement sound, output the audio data stream.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: November 20, 2018
    Assignee: Google LLC
    Inventor: Zaccariah Bowling
  • Patent number: 10051382
    Abstract: A method performs noise suppression in hearing aids. A step of the method involves a first audio signal being split into a plurality of essentially disjunct frequency bands. A further step of the method involves a reference band being selected from the plurality of frequency bands, which reference band has an establishable first component of a speech signal. Another step involves a correlation between the reference band and a first frequency band being ascertained. A further step involves a value that indicates a second component of a speech signal in the first frequency band being ascertained on the basis of the correlation. Another step of the method involves a noise suppression being set in the first frequency band on the basis of the ascertained value.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: August 14, 2018
    Assignee: Sivantos Pte. Ltd.
    Inventors: Eghart Fischer, Ulrich Kornagel, Rainer Martin, Henning Puder, Alexander Schasse
  • Patent number: 10013997
    Abstract: A method for adjusting a degree of filtering applied to an audio signal includes modeling a probability density function (PDF) of a fast Fourier transform (FFT) coefficient of a primary channel and reference channel of the audio signal; maximizing at least one of PDFs to provide a discriminative relevance difference (DRD) between a noise magnitude estimate of the reference channel and a noise magnitude estimate of the primary channel. The method further includes emphasizing the primary channel when the spectral magnitude of the primary channel is stronger than the spectral magnitude of the reference channel; and deemphasizing the primary channel when the spectral magnitude of the reference channel is stronger than the spectral magnitude of the primary channel.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: July 3, 2018
    Assignee: Cirrus Logic, Inc.
    Inventors: Erik Sherwood, Carl Grundstrom
  • Patent number: 10002614
    Abstract: There is provided a method and device for determining an inter-channel time difference of a multi-channel audio signal having at least two channels. A set of local maxima of a cross-correlation function involving at least two different channels of the multi-channel audio signal is determined (S1) for positive and negative time-lags, where each local maximum is associated with a corresponding time-lag. From the set of local maxima, a local maximum for positive time-lags is selected as a so-called positive time-lag inter-channel correlation candidate and a local maximum for negative time-lags is selected as a so-called negative time-lag inter-channel correlation candidate (S2). When the absolute value of a difference in amplitude between the inter-channel correlation candidates is smaller than a first threshold, it is evaluated whether there is an energy-dominant channel (S3).
    Type: Grant
    Filed: April 7, 2011
    Date of Patent: June 19, 2018
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Manuel Briand, Tomas Jansson
  • Patent number: 9889931
    Abstract: A UAV is provided to cancel background noise from audio data collected by the UAV. The UAV is provided with one or more background microphones in a proximity of one or more background noise-producing components. The UAV is also provided with one or more audio source collecting microphones. The audio data collected by the background microphones may be used to reduce or cancel interfering background noise from the audio signal detected by the audio source collecting microphone. The target audio may be captured or recorded with little or no background noise.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: February 13, 2018
    Assignee: SZ DJI TECHNOLOGY, CO., LTD
    Inventors: Xingwang Xu, Zisheng Cao, Hualiang Qiu, Mingyu Wang, Xiaozheng Tang
  • Patent number: 9883311
    Abstract: An audio playback system generates output signals for multiple channels of acoustic transducers by applying a rendering matrix to data representing the aural content and spatial characteristics of audio objects, so that the resulting sound field creates accurate listener impressions of the spatial characteristics. Matrix coefficients are updated to render moving objects. Discontinuous updates of the rendering matrix coefficients are controlled according to psychoacoustic principles to reduce audible artifacts. The updates may also be managed to control the amount of data needed to perform the updates.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: January 30, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Dirk Jeroen Breebaart, David S. McGrath, Rhonda Wilson
  • Patent number: 9842582
    Abstract: A system for self-organized acoustic signal cancellation over a network is disclosed. The system may transmit an acoustic sounding signal to an interfering device so that a channel measurement may be performed for a channel between the interfering device and an interferee device. The system may receive the channel measurement for the channel from the interfering device and also receive a digitized version of an audio interference signal associated with the interfering device. Based on the channel measurement and the digital version of the interference signal, the system may calculate a cancellation signal prior to the arrival of the original over-the-air audio interference signal that corresponds to the digital version of audio interference signal. The system may then apply the cancellation signal to an audio signal associated with the interferee device to remove the interference signal from the audio signal.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: December 12, 2017
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Lusheng Ji, Donald J. Bowen, Dimitrios B. Dimitriadis, Horst J. Schroeter
  • Patent number: 9837094
    Abstract: A method includes determining an error condition during a bandwidth transition period of an encoded audio signal. The error condition corresponds to a second frame of the encoded audio signal, where the second frame sequentially follows a first frame in the encoded audio signal. The method also includes generating audio data corresponding to a first frequency band of the second frame based on audio data corresponding to the first frequency band of the first frame. The method further includes re-using a signal corresponding to a second frequency band of the first frame to synthesize audio data corresponding to the second frequency band of the second frame.
    Type: Grant
    Filed: June 6, 2016
    Date of Patent: December 5, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Subasingha Shaminda Subasingha, Venkatraman Atti, Vivek Rajendran
  • Patent number: 9818428
    Abstract: Methods and systems are provided for separating a target speech from a plurality of other speeches having different directions of arrival. One of the methods includes obtaining speech signals from speech input devices disposed apart in predetermined distances from one another, calculating a direction of arrival of target speeches and directions of arrival of other speeches other than the target speeches for each of at least one pair of speech input devices, calculating an aliasing metric, wherein the aliasing metric indicates which frequency band of speeches is susceptible to spatial aliasing, enhancing speech signals arrived from the direction of arrival of the target speech signals, based on the speech signals and the direction of arrival of the target speeches, to generate the enhanced speech signals, reading a probability model, and inputting the enhanced speech signals and the aliasing metric to the probability model to output target speeches.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: November 14, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Takashi Fukuda, Osamu Ichikawa
  • Patent number: 9805316
    Abstract: A planning system (201) for scheduling the operation of autonomous entities within a defined geographical region. The planning system operates at a region plan level (301) for strategic planning across the geographical region, at an operation plan level (302) for operations to be performed by autonomous entities in localized zones having operation-defined geographical boundaries, and at a task plan level (303) in which processing is undertaken in respect of specific tasks to be performed by the autonomous entities, in undertaking the operations.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: October 31, 2017
    Assignee: The University of Sydney
    Inventors: Eric Nettleton, Ross Hennessy, Hugh Durrant-Whyte, Ali Haydar Göktogan
  • Patent number: 9773489
    Abstract: A first control signal filter to which a cosine wave oscillating at a control frequency is input; a second control signal filter to which a sine wave oscillating at the control frequency is input; a control signal adder for outputting a control signal generated by adding an output of the first control signal filter and an output of the second control signal filter; a filter coefficient update unit for updating filter coefficients of the first control signal filter and the second control signal filter; and a frequency correction value calculation unit for calculating a frequency correction value for correcting the control frequency on the basis of the control signal and the control frequency.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: September 26, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventor: Atsuyoshi Yano
  • Patent number: 9774967
    Abstract: Acoustic transducer aging compensation is effective for an acoustic transducer that is driven with an adjustable drive power to output a signal. A microphone can measure the amplitude of the transmitted signal corresponding to a transmitted sound pressure level (SPL). A controller can periodically compare the transmitted SPL to the drive power or a previous SPL, and determine if the received SPL has declined with respect to the input drive power over time, whereupon the controller can direct an increase in drive power to the SPL-declined acoustic transducer to compensate for the decline in received SPL. If drive power is at a maximum, the controller can further instruct a mobile device receiver to lower its receiver detection threshold for the signal from the SPL-declined acoustic transducer to further compensate for the decline in SPL from that acoustic transducer.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: September 26, 2017
    Assignee: Symbol Technologies, LLC
    Inventors: Richard J Lavery, Sean D Marvel
  • Patent number: 9761244
    Abstract: A voice processing device includes a noise-originating coefficient calculation section that calculates a noise-originating coefficient that gradually decreases as a target value of stationary noise for each frequency increases, the target value being calculated based on an amplitude value of a frequency spectrum obtained by time-frequency transforming a voice signal for a predetermined period of time, and a suppression signal generation section that generates, when the frequency spectrum is determined as being stationary on the basis of the amplitude value, a suppression signal by multiplying a suppression coefficient based on the noise-originating coefficient by the amplitude value, the suppression signal being frequency-time transformed to be output.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: September 12, 2017
    Assignee: FUJITSU LIMITED
    Inventor: Chikako Matsumoto
  • Patent number: 9666206
    Abstract: At least one signal is received that represents speech and noise. In response to the at least one signal, frequency bands are generated of an output channel that represents the speech while attenuating at least some of the noise from the at least one signal. Within a kth frequency band of the at least one signal: a first ratio is determined of a clean version of the speech for a preceding time frame to the noise for the preceding time frame; and a second ratio is determined of a noisy version of the speech for the time frame n to the noise for the time frame n. In response to the first and second ratios, a gain is determined for the kth frequency band of the output channel for the time frame n.
    Type: Grant
    Filed: August 20, 2012
    Date of Patent: May 30, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Takahiro Unno
  • Patent number: 9640197
    Abstract: Methods and systems are provided for separating a target speech from a plurality of other speeches having different directions of arrival. One of the methods includes obtaining speech signals from speech input devices disposed apart in predetermined distances from one another, calculating a direction of arrival of target speeches and directions of arrival of other speeches other than the target speeches for each of at least one pair of speech input devices, calculating an aliasing metric, wherein the aliasing metric indicates which frequency band of speeches is susceptible to spatial aliasing, enhancing speech signals arrived from the direction of arrival of the target speech signals, based on the speech signals and the direction of arrival of the target speeches, to generate the enhanced speech signals, reading a probability model, and inputting the enhanced speech signals and the aliasing metric to the probability model to output target speeches.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: May 2, 2017
    Assignee: International Business Machines Corporation
    Inventors: Takashi Fukuda, Osamu Ichikawa
  • Patent number: 9589580
    Abstract: A method for processing sound that includes, generating one or more noise component estimates relating to an electrical representation of the sound and generating an associated confidence measure for the one or more noise component estimates. The method further comprises processing, based on the confidence measure, the sound.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: March 7, 2017
    Assignee: Cochlear Limited
    Inventors: Adam A. Hersbach, Stefan J. Mauger, John M. Heasman, Pam W. Dawson
  • Patent number: 9584909
    Abstract: Methods and systems are provided for implementing a distributed algorithm for beam-forming (e.g., MVDR beam-forming) using a message-passing algorithm. The message-passing algorithm provides for computations to be performed in a distributed manner across a network, rather than in a centralized processing center or “fusion center”. The message-passing algorithm may also function for any network topology, and may continue operations when various changes are made in the network (e.g., nodes appearing, nodes disappearing, etc.). Additionally, the message-passing algorithm may minimize the transmission power per iteration and, depending on the particular network, also may minimize the transmission power required for communication between network nodes.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: February 28, 2017
    Assignee: Google Inc.
    Inventors: Richard Heusdens, Guoqiang Zhang, Richard Hendriks, Yuan Zeng, Willem Bastiaan Kleijn
  • Patent number: 9554208
    Abstract: In aspects of concurrent sound source localization of multiple speakers, audio signals from two or more microphones are upsampled, and then the upsampled audio signals are time-multiplexed to a plurality of beamformers. A first sound source received at the two or more microphones is localized at a first beamformer, and a second sound source received at the two or more microphones is localized at a second beamformer, where localizing the second sound source is constrained by the localization of the first sound source. The beamformers can filter the upsampled audio signals using beamformer coefficients from the localizations to produce beamformed audio signals.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: January 24, 2017
    Assignee: Marvell International Ltd.
    Inventors: Kapil Jain, Zining Wu
  • Patent number: 9536540
    Abstract: Provided are systems and methods for generating clean speech from a speech signal representing a mixture of a noise and speech. The clean speech may be generated from synthetic speech parameters. The synthetic speech parameters are derived based on the speech signal components and a model of speech using auditory and speech production principles. The modeling may utilize a source-filter structure of the speech signal. One or more spectral analyzes on the speech signal are performed to generate spectral representations. The feature data is derived based on a spectral representation. The features corresponding to the target speech according to a model of speech are grouped and separated from the feature data. The synthetic speech parameters, including spectral envelope, pitch data and voice classification data are generated based on features corresponding to the target speech.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: January 3, 2017
    Assignee: Knowles Electronics, LLC
    Inventors: Carlos Avendano, David Klein, John Woodruff, Michael M. Goodwin
  • Patent number: 9530408
    Abstract: A system for providing an acoustic environment recognizer for optimal speech processing is disclosed. In particular, the system may utilize metadata obtained from various acoustic environments to assist in suppressing ambient noise interfering with a desired audio signal. In order to do so, the system may receive an audio stream including an audio signal associated with a user and including ambient noise obtained from an acoustic environment of the user. The system may obtain first metadata associated with the ambient noise, and may determine if the first metadata corresponds to second metadata in a profile for the acoustic environment. If the first metadata corresponds to the second metadata, the system may select a processing scheme for suppressing the ambient noise from the audio stream, and process the audio stream using the processing scheme. Once the audio stream is processed, the system may provide the audio stream to a destination.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: December 27, 2016
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Horst J. Schroeter, Donald J. Bowen, Dimitrios B. Dimitriadis, Lusheng Ji