Phase Comparison And/or Correlation Patents (Class 367/125)
  • Patent number: 11399248
    Abstract: In one example, a video endpoint obtains, from a vertical microphone array, a first audio signal including audio from a target sound source and audio from a horizontally-displaced sound source. The video endpoint obtains, from a horizontal microphone array, a second audio signal and a third audio signal both including the audio from the target sound source and the audio from the horizontally-displaced sound source. Based on the second audio signal and the third audio signal, the video endpoint determines at least one of a first degree of arrival of the audio from the target sound source or a second degree of arrival of the audio from the horizontally-displaced sound source. Based on the at least one of the first degree of arrival or the second degree of arrival, the video endpoint adjusts a gain of the first audio signal.
    Type: Grant
    Filed: June 15, 2021
    Date of Patent: July 26, 2022
    Assignee: CISCO TECHNOLOGY, INC.
    Inventor: Lennart Burenius
  • Patent number: 11276388
    Abstract: A beamforming system comprises an input module, a phase-difference module, a delay distribution module, and a delay estimation module configured to make a final delay estimation based on the delay distribution. The final delay estimation is applied to align one of two selected channels and combine the two channels to obtain a signal of interest. The phase-difference module calculates phase differences for a range of frequency bins. The delay estimation module considers all possible delays derived from the phase differences, including multiples of ±2? to overcome the ambiguity in high frequency bins when the spacing between two acoustic sensors is longer than the half of the wavelengths.
    Type: Grant
    Filed: March 31, 2020
    Date of Patent: March 15, 2022
    Assignee: NUVOTON TECHNOLOGY CORPORATION
    Inventor: Powen Ru
  • Patent number: 10834505
    Abstract: An apparatus configured to obtain a plurality of phase differences is provided. Each phase difference represents a difference in phase between a spectral component in a first sound signal and a corresponding spectral component in a second sound signal, to estimate an aliasing frequency. Phase differences in frequency bands above the aliasing frequency are expected to be wrapped, and to unwrap the plurality of phase differences in dependence on the estimated aliasing frequency. A phase difference obtained from spectral components that are comprised in one frequency band is unwrapped independently of any phase difference obtained from spectral components that are comprised in another frequency band.
    Type: Grant
    Filed: May 28, 2019
    Date of Patent: November 10, 2020
    Assignee: Huawei Technologies Duesseldorf GmbH
    Inventors: Jürgen Geiger, Kainan Chen, Peter Grosche
  • Patent number: 10635057
    Abstract: A building automation system generates occupancy information for occupants of spaces of a building (e.g. quantity, identity and/or location of the occupants) based on occupancy sensors in the spaces. The occupancy sensors capture speech sounds originating from one or more occupants of the spaces and/or ultrasonic emissions originating from one or more user devices of the occupants are via microphone arrays. Audio data based on the captured sound is then generated. Position information for the sources of the sound is determined based on the audio data, and the audio data is enhanced based on the position information via a beamforming process. Occupancy information for the spaces is generated based on the audio data. Environmental conditions of the spaces are controlled based on the presence, absence, position, orientation, distribution and/or preferences of the occupants in the space.
    Type: Grant
    Filed: August 24, 2018
    Date of Patent: April 28, 2020
    Assignee: Sensormatic Electronics, LLC
    Inventors: Miguel Galvez, Walter A. Martin, Danny Hyun
  • Patent number: 10578727
    Abstract: In the method for detecting a wet or damp roadway and for detecting objects, first distance signals are initially received. Thereafter, at least one object is detected if the received first distance signals correspond to a distance which is greater than or equal to a certain distance threshold value. If the received first distance signals correspond to a predefined distance which is less than the certain distance threshold value, the received first distance signals are compared to stored second distance signals. A wet or damp roadway is detected as a function of a deviation established by way of this comparison of the received and stored distance signals.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: March 3, 2020
    Assignee: Robert Bosch GmbH
    Inventors: Zoltan Banko, Tamas Orosz, Zoltan Braun
  • Patent number: 10531210
    Abstract: A technique for detecting spills is described. A number of audio sensors detect a sound potentially associated with an object spilling on a surface and the audio data from the sensors is analyzed in order to generate an acoustical analysis of the sound. The analysis of the sound detected by the audio sensors is compared against a database of known sounds corresponding to a number of types of spill incidents. Based on a match detected between the analysis of the sound and a type of spill incident in the database of known sounds, the identity of the object spilled can be determined. The location of the spilled object can also be calculated by triangulating the sensor data from the audio sensors.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: January 7, 2020
    Assignee: Walmart Apollo, LLC
    Inventors: Steven Jackson Lewis, Kevin Matthew Charles, Matthew Dwain Biermann
  • Patent number: 10405115
    Abstract: Reliable detection of a microphone failure along with corrective action are provided for a portable communication device having multiple microphones. The faulty microphone detection uses a correlation based metric between three (3) or more microphones. The approach is based on full cross correlation, including phase as well as magnitude, between unique microphone pairs for isolating a faulty microphone condition. The approach allows for the determination of precisely which microphone has failed and minimizes false triggers under windy conditions within a microphone array.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: September 3, 2019
    Assignee: MOTOROLA SOLUTIONS, INC.
    Inventors: Daniel Landron, Kurt S. Fienberg
  • Patent number: 10379218
    Abstract: Multistatic active coherent sonar systems and methods include reception by floating receiver sonobuoys of acoustic signals emitted by floating source sonobuoys, by both direct propagation from the source sonobuoys and reflection or scattering from a target object. Subsequent calculations based at least in part on those signals can be employed to estimate relative or absolute positions or velocities of the target object and the source and receiver sonobuoys. The estimated relative velocities and positions can be calculated without relying on GPS or other extrinsic positioning signals acquired for each sonobuoy after its deployment. Acoustic signals emitted by a stationary source on the seabed, received by a stationary receiver on the seabed, or reflected/scattered from a bathymetric feature, can be employed to estimate absolute or relative positions or velocities of the target object and the source and receiver sonobuoys.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: August 13, 2019
    Assignee: Scientific Innovations, Inc.
    Inventor: John Louis Spiesberger
  • Patent number: 10244382
    Abstract: Apparatus with I/O modules such as a networked security camera with a plurality of wireless connections to continue to use at least one network connection is presented. The apparatus, comprising a plurality of RF units, a plurality of SIM card interfaces, at least one processing unit, at least one non-transitory computer readable storage medium and at least on input/output module, is able to continue sending and receiving data through one or more wireless networks using a plurality of RF units. Further, when more bandwidth and/or higher reliability is required, the apparatus aggregates data connections established with different wireless networks.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: March 26, 2019
    Assignee: PISMO LABS TECHNOLOGY LIMITED
    Inventors: Ming Pui Chong, Wan Chun Leung, Chan Neng Leong, Uzair Ahmed Chughtai
  • Patent number: 10112730
    Abstract: One or more methods for remotely estimating a drone's weight during flying are contemplated. It is possible to utilize a long range laser Doppler Vibrometer or a remote optical surveillance system. In addition, it is possible to employ a method disclosed herein using physical signatures for identifying flight characteristics and manufacturers of different drones and for monitoring drones' degradation prior to failures as a condition based maintenance system. The present teachings are applicable to drones, helicopters, and all manned and unmanned aerial vehicles.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: October 30, 2018
    Inventor: Mohamed Alsayed Ahmed Mohamed Ismail
  • Patent number: 9800973
    Abstract: An implementation operable by a device coupled to a sound sensor array including a plurality of sound sensors in a particular arrangement is provided. The implementation involves obtaining a plurality of simulated responses mapping respective simulated physical arrangements of one or more simulated sound sources to respective expected outputs from the sound sensor array. The implementation also involves receiving a response based on output from the sound sensor array. The response may indicate detection of sounds from a plurality of sound sources in an environment of the sound sensor array. The implementation also involves comparing the received response with at least one of the plurality of simulated responses. The implementation also involves estimating locations of the plurality of sound sources relative to the sound sensor array based on the comparison. The implementation also involves operating the device based on the estimated locations of the plurality of sound sources.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: October 24, 2017
    Assignee: X Development LLC
    Inventors: Olivier Chatot, Satoshi Kagami, Anja Austermann
  • Patent number: 9769565
    Abstract: A method and apparatus are provided for processing data for estimating mixing parameters of at least one audio spot signal captured by a sound recording device, called a spot microphone, arranged in the vicinity of a source among a plurality of acoustic sources constituting a sound scene, and a primary audio signal captured by an ambisonic sound recording device, arranged to capture said plurality of acoustic sources of the sound scene.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: September 19, 2017
    Assignees: B<>COM, ORANGE
    Inventors: Andrey Fedosov, Jerome Daniel, Gregory Pallone
  • Patent number: 9711165
    Abstract: Processes are described herein for transforming an audio mixture for which a specific component is affected by reverberation, into a specific dry component (i.e. unaffected by the reverberation) and a background component. In the process described herein, the long-term effects of reverberation are explicitly taken into account by modelling the spectrogram of the specific component as the result of a matrix convolution along time between the spectrogram of the specific dry component and a reverberation matrix. Parameters of the model are estimated iteratively by minimizing a cost-function measuring the divergence between the spectrogram of the mixture signal and the model of the spectrogram of the mixture signal.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: July 18, 2017
    Assignee: AUDIONAMIX
    Inventor: Romain Hennequin
  • Patent number: 9383704
    Abstract: A grammage detection sensor according to an aspect of the present invention includes a transmission unit configured to transmit an ultrasonic wave, a reception unit configured to receive the ultrasonic wave transmitted from the transmission unit, and a control unit configured to detect a grammage of a recording material, when a plurality of recording materials are continuously conveyed between the transmission unit and the reception unit, on the basis of a first ultrasonic wave received by the reception unit after the ultrasonic wave is transmitted by the transmission unit between a preceding recording material and a recording material following the preceding recording material, and a second ultrasonic wave received via a recording material by the reception unit after the ultrasonic wave is transmitted by the transmission unit.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: July 5, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Teruhiko Namiki, Shuhei Watanabe, Yasutaka Yagi, Tsutomu Ishida, Tadashi Okanishi, Motoyasu Muramatsu
  • Patent number: 9310464
    Abstract: A data processor data processor is capable of compensating with multipath phase compensation data for a multipath phase error in the at least one subcarrier phase associated with the multipath-impacted signal arising from the transmitted OFDM-like signal. The phase compensation data results in or comprises an adjustment to the estimated range based on a direct signal vector length of a direct path signal and a multipath-impacted signal vector length of a multipath-impacted signal that are determined through observed signals or observed signal vectors of the receiver. The data processor estimates the location of the receiver or estimated range, based on the precise estimate, with the above adjustment for multipath.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: April 12, 2016
    Assignee: DEERE & COMPANY
    Inventor: Richard G. Keegan
  • Patent number: 9275645
    Abstract: A system, method, and apparatus for drone detection and classification are disclosed. An example method includes receiving a sound signal in a microphone and recording, via a sound card, a digital sound sample of the sound signal, the digital sound sample having a predetermined duration. The method also includes processing, via a processor, the digital sound sample into a feature frequency spectrum. The method further includes applying, via the processor, broad spectrum matching to compare the feature frequency spectrum to at least one drone sound signature stored in a database, the at least one drone sound signature corresponding to a flight characteristic of a drone model. The method moreover includes, conditioned on matching the feature frequency spectrum to one of the drone sound signatures, transmitting, via the processor, an alert.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: March 1, 2016
    Assignee: DRONESHIELD, LLC
    Inventors: Brian Hearing, John Franklin
  • Patent number: 9247343
    Abstract: A sound direction estimation device includes a first correlation matrix calculation unit configured to calculate a correlation matrix of a plurality of channels of input sound signals, a second correlation matrix calculation unit configured to calculate a correlation matrix of noise signals based on the plurality of channels of sound signals, and a sound source localization unit configured to calculate a spatial spectrum based on the correlation matrix calculated by the first correlation matrix calculation unit and the correlation matrix calculated by the second correlation matrix calculation unit and to estimate a direction of a sound source associated with the plurality of channels of sound signals using the calculated spatial spectrum.
    Type: Grant
    Filed: September 11, 2013
    Date of Patent: January 26, 2016
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Kazuhiro Nakadai, Keisuke Nakamura, Keita Okutani
  • Patent number: 9232333
    Abstract: The disclosed apparatus, systems, and methods provide a calibration technique for calibrating a set of microphones. The disclosed calibration technique is configured to calibrate the microphones with respect to a reference microphone and can be used in actual operation rather than a testing environment. The disclosed calibration technique can estimate both the magnitude calibration factor for compensating magnitude sensitivity variations and the relative phase error for compensating phase delay variations. In addition, the disclosed calibration technique can be used even when multiple acoustic sources are present. The disclosed technique is particularly well suited to calibrating a set of microphones that are omnidirectional and sufficiently close to one another.
    Type: Grant
    Filed: July 28, 2014
    Date of Patent: January 5, 2016
    Assignee: Analog Devices, Inc.
    Inventors: Juri Ranieri, David Wingate, Noah Daniel Stein
  • Patent number: 9213078
    Abstract: A system and method for determining a characteristic of a noise source. A first array of microphones is mounted on a platform moveable from a starting position to an ending position along a line parallel to a central axis of the noise source. A second array of microphones includes sound sensors mounted in a spaced apart fixed position with respect to the noise source. A processing system processes first information from the first array of microphones and second information from the second array of microphones. The processing system collects and stores the first and second information at each discrete step of the first array, spatially filters the first information, processes and calibrates the filtered first information based on the second information, and further processes the calibrated first information to obtain a characteristic at a selected location. For flyover testing, the first array is instead held in a fixed position.
    Type: Grant
    Filed: May 31, 2014
    Date of Patent: December 15, 2015
    Assignee: The Boeing Company
    Inventors: James Robert Underbrink, Leon Brusniak
  • Patent number: 9069065
    Abstract: Techniques are described for determining locations of audio sources. Audio signals are captured from multiple locations. Pairs of the audio signals are analyzed to create correlograms, indicating correlation scores corresponding to different time offsets between the signals. Based on the correlograms, various locations are analyzed to determine probabilities of audio originating from those locations. The highest probabilities are found, indicating locations containing audio sources. In some situations, the audio sources may be reflective sources, and the locations of the reflective sources may be used to determine locations of objects or surfaces.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: June 30, 2015
    Assignee: Rawles LLC
    Inventors: Christopher D. Coley, Ramy S. Sadek, Joshua Pollack, Jeffrey P. Adams
  • Patent number: 9024788
    Abstract: A vehicle direction identification device includes: a frequency analysis unit which analyzes amplitude or phase of surrounding sound in each analysis section; a sound source direction identification unit which identifies a sound source direction included in the surrounding sound for each analysis section; a vehicle identification information storage unit which stores first vehicle identification information including a first threshold value; a first vehicle identification unit which calculates a rate of occurrence of each sound source direction and identifies the sound source direction whose rate of occurrence is equal to or exceeds the first threshold value; a second vehicle identification information calculation unit which calculates second vehicle identification information including a second threshold value smaller than the first threshold value; and a second vehicle identification unit which identifies the sound source direction whose rate of occurrence is equal to or exceeds the second threshold value.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: May 5, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Mototaka Yoshioka, Shinichi Yoshizawa
  • Patent number: 8995226
    Abstract: There is provided a method and associated apparatus for measurement. Specifically, a method for determining a distance travelled by a signal in a medium, or the time of flight of a signal travelled. The method comprises considering an unambiguous range wherein the unambiguous range greater than a distance to be travelled by a signal. A signal is then transmitted across the distance to be determined, the signal comprising at least two frequency components, the frequency components based on the unambiguous range and the speed of the signal in the medium. The distance travelled (or the time of flight) is determined by using the variance of the received phase characteristics, such as phase angle) of one frequency component of the received signal with the received phase characteristics of another frequency component of the received signal.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: March 31, 2015
    Assignee: Bios Developments Limited
    Inventors: Laurie Linnett, Allison Mason
  • Patent number: 8988970
    Abstract: The dereverberation of signals in reverberating environments is carried out via acquiring the representation (image) of spatial distribution of the signals in space of interest and automatic identification of reflections of the source signal in the reverberative space. The technique relies on identification of prominent features at the image, as well as corresponding directions of propagation of signals manifested by the prominent features at the image, and computation of similarity metric between signals corresponding to the prominent features in the image. The time delays between the correlated signals (i.e., source signal and related reflections) are found and the signals are added coherently. Multiple beamformers operate on the source signal and corresponding reflections, enabling one to improve the signal-to-noise ratio in multi-path environments.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: March 24, 2015
    Assignee: University of Maryland
    Inventors: Adam O'Donovan, Ramani Duraiswami, Dmitry N. Zotkin
  • Patent number: 8982668
    Abstract: In an embodiment a semiconductor device correlates a received signal with a known pattern. A correlation output is used as a basis for forming a confidence reference level. The confidence reference level and the correlation output are compared to identify a peak in the received signal indicating that a present signal state of the received signal contains the known pattern.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: March 17, 2015
    Assignee: Semiconductor Components Industries, LLC
    Inventors: Pavel Horsky, Ivan Koudar, Tomas Suchy
  • Patent number: 8908475
    Abstract: An acoustic positioning device includes an acoustic emitter and receiver. The device emits a sequence of at least one first acoustic signal (S1) and one second acoustic signal (S2), separated by a time interval T, and to receive and measure the arrival phase ?1 of S1 and the arrival phase ?2 of S2. The device measures a relative displacement between the acoustic emitter and the acoustic receiver and determines the approximate difference (R2?R1)AUX between the distance R1 traveled by S1 between the acoustic emitter and receiver, and the distance R2 traveled by S2 between the acoustic emitter and the acoustic receiver, and calculates the relative displacement (R2?R1) between the acoustic emitter and the acoustic receiver as a function of the approximate difference (R2?R1)AUX, of the time interval T and of the arrival phases ?1, ?2 respectively of S1 and of S2.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: December 9, 2014
    Assignee: IXBLUE
    Inventors: Fabien Napolitano, Sebastien Pennec, Didier Charlot
  • Patent number: 8864686
    Abstract: A system and method is provided for resolving a pivot point via touchless interaction. It applies to situations where one end of a rigid object is inaccessible but remains stationary at a pivot point, while the other end is free to move and is accessible to an input pointing device. As an example, the rigid object can be a leg bone where the proximal end is at the hip joint and the distal end is at the knee. The system comprises a wand and a receiver that are spatially configurable to touchlessly locate the pivot point without contact. The receiver tracks a relative displacement of the wand and geometrically resolves the location of the pivot point by a spherical mapping. The system can use a combination of ultrasonic sensing and/or accelerometer measurements. Other embodiments are disclosed.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: October 21, 2014
    Assignee: Orthosensor Inc.
    Inventors: Martin Roche, Marc Boillot, Jason McIntosh
  • Patent number: 8814810
    Abstract: A system and method of touchless interaction is provided for resolving a pivot point of an object where direct placement of a sensor at the pivot point is not practical. It applies to situations where the pivot point of a rigid object is inaccessible but remains stationary, while the other end is free to move and is accessible. The system maps the object's pivot point by way of an external sensor that detects constrained motion of the rigid object within a hemispherical banded boundary. It can also detect a geometric pattern and acceleration during the constrained motion to compensate for higher order rotations about the pivot point. Other embodiments are disclosed.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: August 26, 2014
    Assignee: Orthosensor Inc.
    Inventors: Martin Roche, Marc Boillot, Jason McIntosh
  • Patent number: 8817578
    Abstract: There is provided a sonic wave output device comprising, a receiving unit to receive wireless signals transmitted from a certain signal source, a determination unit to determine a parameter value depending on a location of the signal source using the wireless signals received by the receiving unit and a sonic wave output unit to output sonic waves with directionality toward a direction of the signal source based on the parameter value.
    Type: Grant
    Filed: December 11, 2009
    Date of Patent: August 26, 2014
    Assignee: Sony Corporation
    Inventors: Seiichi Izumi, Hiroyuki Fukada
  • Publication number: 20140204715
    Abstract: An acoustic positioning device includes an acoustic emitter and receiver. The device emits a sequence of at least one first acoustic signal (S1) and one second acoustic signal (S2), separated by a time interval T, and to receive and measure the arrival phase ?1 of S1 and the arrival phase ?2 of S2. The device measures a relative displacement between the acoustic emitter and the acoustic receiver and determines the approximate difference (R2?R1)AUX between the distance R1 travelled by S1 between the acoustic emitter and receiver, and the distance R2 travelled by S2 between the acoustic emitter and the acoustic receiver, and calculates the relative displacement (R2?R1) between the acoustic emitter and the acoustic receiver as a function of the approximate difference (R2?R1)AUX, of the time interval T and of the arrival phases ?1, ?2 respectively of S1 and of S2.
    Type: Application
    Filed: September 6, 2012
    Publication date: July 24, 2014
    Inventors: Fabien Napolitano, Sebastien Pennec, Didier Charlot
  • Patent number: 8773952
    Abstract: Disclosed herein is an apparatus and method to track positions of multiple sound sources which can simultaneously track the positions of multiple sound sources. Sound signals input to an array of microphones are separated into independent sound source signals, correlation coefficients between the sound signals input to the microphones and the separated sound source signals are estimated, and the estimated correlation coefficients are analyzed to track the positions of the sound sources.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: July 8, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Ki Hoon Shin
  • Patent number: 8707786
    Abstract: The transmission of a detection wave and the reception of a reflected wave are periodically repeated every transmission period. One received signal is compared with another received signal at a similar corresponding comparison periods in different transmission periods of a receiving time of the reflected wave. Switching between the comparison periods is performed each time the transmission period is updated. A waveform of a received signal in a block A0 corresponding to a reflected wave of an ultrasonic signal transmitted in a first transmission period is stored. The absolute values of differences between the waveform of a received signal in a block A1 corresponding to a reflected wave of an ultrasonic signal transmitted in a second transmission period and the stored waveform of the received signal in the block A0 are accumulated. The waveform of a received signal in a block B1 is stored.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: April 29, 2014
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Yuki Maeda
  • Patent number: 8705320
    Abstract: Systems and methods for providing audio localization are provided. In some aspects, a method includes receiving phase offsets of a plurality of fixed transmitters from a source other than the plurality of fixed transmitters, detecting an audio localization signal from each of the plurality of fixed transmitters, determining a received phase of the audio localization signal from each of the plurality of fixed transmitters, determining time differences of flight from the mobile receiver to the plurality of fixed transmitters using the received phases, determining distance differences from the mobile receiver to the plurality of fixed transmitters using the time differences of flight, and determining the location of the mobile receiver by performing multilateration using the distance differences.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: April 22, 2014
    Assignee: Google Inc.
    Inventors: Jason Holt, Richard Francis Lyon
  • Patent number: 8674824
    Abstract: A sonar sensor array is provided that has reduced power consumption, data bandwidth and data storage requirements. The sensor array may be configured to a sleep mode, low-resolution mode and high-resolution mode. In the sleep mode, all sonar sensors are configured in the sleep mode and no acoustic signals are detected. In the low-resolution mode, a limited number of sonar sensors are powered and acoustic signals received by the sonar sensors are processed with reduced bandwidth and reduced dynamic range, and then stored on a data storage device. In the high-resolution mode, the acoustic signals detected by the sonar sensors are processed with full signal bandwidth and full dynamic range and then stored on the data storage device.
    Type: Grant
    Filed: August 6, 2012
    Date of Patent: March 18, 2014
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Timothy B. Straw, Michael J. Obara, Stephen A. Caldwell
  • Patent number: 8670290
    Abstract: The invention relates to a method for determining the location of an impact on a surface of an object based on the analysis of an acoustic signal generated by the impact. This method further comprises a signal treatment step of weighting the acoustic signal to take into account spurious contributions in particular due to reflections at the border of the object.
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: March 11, 2014
    Assignee: Elo Touch Solutions, Inc.
    Inventors: Djamel Aklil, Thomas Fillon
  • Patent number: 8565445
    Abstract: A signal processing unit is provided. The signal processing unit includes an orthogonal transforming part including at least two sound input parts receiving input sound signals on a time axis, the orthogonal transforming part transforming two of the input sound signals into respective spectral signals on a frequency axis, a phase difference calculating part obtaining a phase difference between the two spectral signals on the frequency axis, and a filter part phasing, when the phase difference is within a given range, each component of a first one of the two spectral signals based on the phase difference at each frequency to calculate a phased spectral signal and combining the phased spectral signal and a second one of the two spectral signals to calculate a filtered spectral signal.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: October 22, 2013
    Assignee: Fujitsu Limited
    Inventor: Naoshi Matsuo
  • Patent number: 8531917
    Abstract: An apparatus for estimating a Direction of Arrival (DOA) of a wideband includes a first signal receiving unit and a second signal receiving unit to receive a wideband signal while satisfying d?Mc/2fs, wherein ‘d’ denotes a distance the first signal receiving unit and the second signal receiving unit are spaced apart from each other, ‘c’ denotes the speed of sound, ‘M’ denotes a number of wideband frequencies being a number of fast Fourier transformation (FFT) points of a wideband signal, and ‘fs’ denotes a sampling frequency, and a DOA calculating unit to calculate a DOA (?) using a normalized frequency ( f) which is obtained by performing an FFT on the respective wideband signals transmitted from the first signal receiving unit and the second signal receiving unit, and using the distance d.
    Type: Grant
    Filed: April 14, 2010
    Date of Patent: September 10, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Weiwei Cui, Ki Wan Eom, Hyung-Joon Lim
  • Patent number: 8459119
    Abstract: For precisely determining a position of an electronic pen using ultrasonic, only a direct wave arriving first at a reception device is detected without being affected by a reflected wave of an ultrasonic signal to count a propagation time of the electronic pen. An infrared signal including a trigger signal indicative of transmission timing and data indicative of an M-sequence initial condition, and an ultrasonic signal made into an M-sequence are simultaneously sent from the electronic pen in each fixed transmission cycle. The reception device disposed at a predetermined position receives the infrared signal from the electronic pen to generate an M-sequence model waveform from M-sequence initial condition data that the infrared signal includes. The reception device further receives the ultrasonic signal from the electronic pen to calculate a value of correlation between the ultrasonic signal and the above-described M-sequence model waveform.
    Type: Grant
    Filed: January 28, 2008
    Date of Patent: June 11, 2013
    Assignee: NEC Corporation
    Inventor: Junichi Miyamoto
  • Patent number: 8446287
    Abstract: A loose part monitoring method and system for preventing the generation of a false alarm as much as possible, including analyzing a group of detection signals that have been output from a plurality of sensors placed on a wall defining a fluid flow path, wherein the group of detection signals are analyzed for a rising gradient that is related to change in intensity of impulsive sound, a damping time that is related to change of intensity of the impulsive sound, and a frequency spectrum that is related to pitch of the impulsive sound in order to determine whether the group of detection signals are false or true.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: May 21, 2013
    Assignee: Shikoku Research Institute Incorporated
    Inventor: Toshizumi Morisawa
  • Publication number: 20130107669
    Abstract: Methods, systems, and vehicles are provided for localizing a vehicle. A sensor is configured to detect an object disposed in a generally upward direction from the vehicle while the vehicle is travelling. A processor is coupled to the sensor. The processor is configured to correlate the object with information from a map database, thereby generating a correlation, and determine a geographic location of the vehicle based on the correlation.
    Type: Application
    Filed: October 28, 2011
    Publication date: May 2, 2013
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: JAMES N. NICKOLAOU, DANIEL GANDHI, DMITRIY FELDMAN
  • Patent number: 8427905
    Abstract: To enable precise calculation of a propagation time of a direct wave which arrives fastest from an ultrasonic generation source without being affected by a reflected wave of an ultrasonic signal. A plurality of ultrasonic signals generated based on a plurality of M sequences different from each other are propagated from a transmission side to a reception side, whereby the reception side generates model waveforms of the plurality of M sequences, executes correlation processing between each model waveform and a waveform of each ultrasonic signal and detects a secondary peak of a correlation value which appears when both waveforms partly coincide with each other to determine an M sequence which generates a smallest secondary peak among secondary peaks detected by all the correlation processing as an optimum M sequence.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: April 23, 2013
    Assignee: NEC Corporation
    Inventors: Junichi Miyamoto, Hiroshi Kajitani
  • Patent number: 8363512
    Abstract: Sound and image are sampled simultaneously using a sound/image sampling unit incorporating a plurality of microphones and a camera. Sound pressure waveform data and image data are stored in a storage means. Then the sound pressure waveform data are extracted from the storage means, and a graph of a time-series waveform of the sound pressure level is displayed on a display screen. A time point at which to carry out a calculation to estimate sound direction is designated on the graph, and then sound direction is estimated by calculating the phase differences between the sound pressure signals of the sound sampled by the microphones, using the sound pressure waveform data for a calculation time length having the time point at the center thereof. A sound source position estimation image having a graphic indicating an estimated sound direction is created and displayed by combining the estimated sound direction and the image data sampled at the time point.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: January 29, 2013
    Assignee: Honda Motors
    Inventors: Masanao Owaki, Takefumi Zaima, Koji Mase
  • Patent number: 8358563
    Abstract: A signal processing apparatus includes: a learning processing unit that finds a separating matrix for separating mixed signals in which outputs from a plurality of sound sources are mixed, by a learning process that applies ICA (Independent Component Analysis) to observed signals including the mixed signals; a separation processing unit that applies the separating matrix to the observed signals to separate the mixed signals and generate separated signals corresponding to each of the sound sources; and a sound source direction estimating unit that computes a sound source direction of each of the generated separated signals.
    Type: Grant
    Filed: June 8, 2009
    Date of Patent: January 22, 2013
    Assignee: Sony Corporation
    Inventor: Atsuo Hiroe
  • Patent number: 8323024
    Abstract: A system for controlling signals coming from or going to an aircraft simulator has a first slave circuit and a second slave circuit. The second slave circuit is used to monitor signals coming from the aircraft simulator. A multiplexer circuit is coupled to the first slave circuit. The first slave circuit sends control signals to the multiplexer circuit for controlling digital output signals being sent to the aircraft simulator. A master controller is coupled to the first slave circuit and the second slave circuit. The master controller is used for controlling operation of the first and second slave circuit. A computer system is coupled to the master controller. The computer system will display a listing of the aircraft simulator signals to be controlled. Selection of a desired aircraft simulator signal by an input device of the computer system will allow one to control the selected aircraft simulator signal.
    Type: Grant
    Filed: February 13, 2006
    Date of Patent: December 4, 2012
    Assignee: The Boeing Company
    Inventor: Tracy R. Davidson
  • Patent number: 8270253
    Abstract: A method for short range alignment using ultrasonic sensing is provided. The method includes shaping an ultrasonic pulse on a first device to produce a pulse shaped signal and transmitting the pulse shaped signal from the first device to a second device, receiving the pulse shaped signal and determining an arrival time of the pulse shaped, identifying a relative phase of the pulse shaped signal with respect to a previously received pulse shaped signal, identifying a pointing location of the first device from the arrival time and the relative phase, determining positional information of the pointing location of the first device, and reporting an alignment of three or more points in three-dimensional space. Other embodiments are disclosed.
    Type: Grant
    Filed: October 3, 2011
    Date of Patent: September 18, 2012
    Assignee: Orthosensor, Inc.
    Inventors: Martin Roche, Jason McIntosh, Marc Boillot
  • Patent number: 8213263
    Abstract: An apparatus and method of voice activity detection (VAD) are disclosed. To detect a target sound, a target sound detecting apparatus calculates the phase difference corresponding to each frequency component from a plurality of sound signals converted in frequency domain, calculates a characteristic value indicating possibility that the phase difference of the frequency component is within an allowable phase difference range of target sound calculated based on a direction angle of the target sound, and detects the presence and/or absence of target sound using the characteristic value.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: July 3, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kyu-hong Kim, Kwang-cheol Oh
  • Patent number: 8194500
    Abstract: A method of locating a sound source based on sound received at an array of microphones comprises the steps of determining a correlation function of signals provided by microphones of the array and establishing a direction in which the sound source is located based on at least one eigenvector of a matrix having matrix elements which are determined based on the correlation function. The correlation function has first and second frequency components associated with a first and second frequency band, respectively. The first frequency component is determined based on signals from microphones having a first distance, and the second frequency component is determined based on signals from microphones having a second distance different from the first distance.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: June 5, 2012
    Assignee: Nuance Communications, Inc.
    Inventors: Tobias Wolff, Markus Buck, Gerhard Schmidt, Olga González Valbuena, Günther Wirsching
  • Publication number: 20120075958
    Abstract: An apparatus for detecting a cavity comprising a signal receiver, a signal analyzer and a threshold excedent determination processor. The signal receiver receives a reflected signal resulting from an interaction of multi-frequency irradiating signal(s) with at least one cavity. The irradiating signal may include an electromagnetic or acoustic signal above a cavity dependent cutoff frequency with a randomized spectral component. The signal analyzer computes cavity detecting statistic(s) of the reflected signal. The cavity detecting statistic(s) may include an autocorrelation function. The autocorrelation function may be a Fourier transform of the power spectral density of the reflected signal. The threshold excedent determination processor generates a notification when cavity detecting statistic(s) exceed a threshold. The threshold may include a multi-variable function. The cavity may be the bore of a weapon. The apparatus may be configured to determine the bearing from the cavity to the apparatus.
    Type: Application
    Filed: October 22, 2010
    Publication date: March 29, 2012
    Inventor: Kenneth J. Hintz
  • Publication number: 20120069714
    Abstract: A sound direction estimation apparatus includes a sound source model storage unit that stores likelihood of a sound source class in correspondence with a sound feature quantity, a sound signal input unit that receives a sound signal, a sound source identification unit that identifies a sound source class of the sound signal input from the sound signal input unit with reference to the sound source model storage unit based on the sound feature quantity of the sound signal, and a first sound source localization unit that estimates a sound direction of the sound signal of the sound source class identified by the sound source identification unit.
    Type: Application
    Filed: August 16, 2011
    Publication date: March 22, 2012
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Kazuhiro NAKADAI, Keisuke NAKAMURA
  • Patent number: 8127138
    Abstract: The invention as disclosed is of a method to authenticate identify and trace sonar transmissions and echoes by embedding transparent, secure and robust digital watermarks in signal space, where the additional information incurs no cost in bandwidth. The complex short time Fourier transform is selected as the domain for embedding the digital watermark, secured by a secret key, in the time frequency representation of the signal. The watermark is designed through an iterative optimization step. This step insures that the watermarked sonar is also realizable. Selection of the time frequency region for watermarking is driven by avoidance of interference with the sonar itself, or in case of network operation, other watermarks. In addition, the selected time-frequency region remains robust to sound channel and other transmission effects. Sonar echoes are authenticated in the time-frequency plane by a correlation receiver tuned to the watermarked region using the secret key.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: February 28, 2012
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Robert S. Lynch, G. Clifford Carter, Bijan Mobasseri
  • Patent number: 8107321
    Abstract: The invention relates to a method for localizing and tracking acoustic sources (101) in a multi-source environment, comprising the steps of recording audio-signals (103) of at least one acoustic source (101) with at least two recording means (104, 105), creating a two- or multi-channel recording signal, partitioning said recording signal into frames of predefined length (N), calculating for each frame a cross-correlation function as a function of discrete time-lag values (?) for channel pairs (106, 107) of the recording signal, evaluating the cross-correlation function by calculating a sampling function depending on a pitch parameter (f0) and at least one spatial parameter (?0), the sampling function assigning a value to every point of a multidimensional space being spanned by the pitch-parameter and the spatial parameters, and identifying peaks in said multidimensional space with respective acoustic sources in the multi-source environment.
    Type: Grant
    Filed: June 1, 2007
    Date of Patent: January 31, 2012
    Assignee: Technische Universitat Graz and Forschungsholding Tu Graz GmbH
    Inventors: Marián Képesi, Michael Wohlmayr, Gernot Kubin