Patents by Inventor David C. Bradley

David C. Bradley has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20160232917
    Abstract: Devices, systems and methods are disclosed for reducing noise in input data by performing a hysteresis operation followed by a lateral excitation smoothing operation. For example, an audio signal may be represented as a sequence of feature vectors. A row of the sequence of feature vectors may, for example, be associated with the same harmonic of the audio signal at different points in time. To determine portions of the row that correspond to the harmonic being present, the system may compare an amplitude to a low threshold and a high threshold and select a series of data points that are above the low threshold and include at least one data point above the high threshold. The system may iteratively perform a spreading technique, spreading a center value of a center data point in a kernel to neighboring data points in the kernel, to further reduce noise.
    Type: Application
    Filed: February 5, 2016
    Publication date: August 11, 2016
    Inventors: David C. Bradley, Yao Huang Morin
  • Publication number: 20160232906
    Abstract: Features that may be computed from a harmonic signal include a fractional chirp rate, a pitch, and amplitudes of the harmonics. A fractional chirp rate may be estimated, for example, by computing scores corresponding to different fractional chirp rates and selecting a highest score. A first pitch may be computed from a frequency representation that is computed using the estimated fractional chirp rate, for example, by using peak-to-peak distances in the frequency distribution. A second pitch may be computed using the first pitch, and a frequency representation of the signal, for example, by using correlations of portions of the frequency representation. Amplitudes of harmonics of the signal may be determined using the estimated fractional chirp rate and second pitch. Any of the estimated fractional chirp rate, second pitch, and harmonic amplitudes may be used for further processing, such as speech recognition, speaker verification, speaker identification, or signal reconstruction.
    Type: Application
    Filed: December 15, 2015
    Publication date: August 11, 2016
    Applicant: The Intellisis Corporation
    Inventors: David C. Bradley, Yao Huang Morin, Massimo Mascaro, Janis I. Intoy, Sean O'Connor, Ellisha Marongelli, Nick Hilton
  • Publication number: 20160232925
    Abstract: An estimate of a pitch of a signal may be computed by using peak-to-peak distances in a frequency representation of the signal. A frequency representation of the signal may be computed, peaks in the frequency representation may be identified, for example, by identifying peaks larger than a threshold value. Peak-to-peak distances may be determined using the locations in frequency of the peaks. The pitch of the signal may be estimated by, for example, estimating cumulative distribution function of the peak-to-peak distances or computing a histogram of the peak-to-peak distances.
    Type: Application
    Filed: December 15, 2015
    Publication date: August 11, 2016
    Applicant: The Intellisis Corporation
    Inventors: David C. Bradley, Yao Huang Morin, Ellisha Marongelli
  • Patent number: 9396740
    Abstract: Pitch in audio signals may be estimated based on symmetry characteristics independent of harmonic amplitudes. A magnitude spectrum of an audio signal may be provided. The magnitude spectrum may be partitioned by dividing a frequency axis into equal-sized cells. Individual cells may be centered on corresponding harmonic frequencies of a hypothesized pitch. The magnitude spectrum contained in individual cells may be normalized to have equal mean magnitudes and equal standard deviations. A likelihood that the hypothesized pitch is an actual pitch of the audio signal may be determined based on symmetries of magnitude spectra contained in individual cells.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: July 19, 2016
    Assignee: KnuEdge Incorporated
    Inventor: David C. Bradley
  • Patent number: 9390204
    Abstract: A method can include identifying a discrete natural fracture in a three-dimensional environment that includes a reservoir modeled by a three-dimensional grid model, representing the discrete natural fracture via a multisegment model in a two-dimensional region within the three-dimensional grid model, defining at least one connection for fluid communication between the multisegment model and the three-dimensional grid model, defining boundary conditions for the multisegment model, and solving the multisegment model subject to the at least one connection and the boundary conditions to provide values for fluid flow in the two-dimensional region. Various other apparatuses, systems, methods, etc., are also disclosed.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: July 12, 2016
    Assignee: Schlumberger Technology Corporation
    Inventors: Garfield Bowen, Terry Wayne Stone, David C. Bradley, Nikolay Morozov
  • Publication number: 20160099012
    Abstract: An estimate of a pitch of a signal may be computed by using correlations of frequency portions of a frequency representation of the signal. An initial pitch estimate may be obtained and frequency portions of the frequency representation may be identified using multiples of the initial pitch estimate. Correlations of the frequency portions may be computed, and a score for the initial pitch estimate may be determined using the correlations. A second pitch estimate may be determined using the first score, and the process may be repeated.
    Type: Application
    Filed: December 15, 2015
    Publication date: April 7, 2016
    Applicant: The Intellisis Corporation
    Inventors: David C. Bradley, Yao Huang Morin, Sean O'Connor
  • Patent number: 9208794
    Abstract: Voice enhancement and/or speech features extraction may be performed on noisy audio signals. An input signal may convey audio comprising a speech component superimposed on a noise component. The input signal may be segmented into discrete successive time windows including a first time window spanning a duration greater than a sampling interval of the input signal. A transform may be performed on individual time windows of the input signal to obtain corresponding sound models of the input signal in the individual time windows. A first sound model may describe a superposition of harmonics sharing a common pitch and chirp in the first time window of the input signal. Linear fits in time of the sound models over individual time windows of the input signal may be obtained. The linear fits may include a first linear fit in time of the first sound model over the first time window.
    Type: Grant
    Filed: August 7, 2013
    Date of Patent: December 8, 2015
    Assignee: The Intellisis Corporation
    Inventors: Massimo Mascaro, David C. Bradley, Yao Huang Morin
  • Patent number: 9183850
    Abstract: A system and method may be configured to analyze audio information derived from an audio signal. The system and method may track sound pitch across the audio signal. The tracking of pitch across the audio signal may take into account change in pitch by determining at individual time sample windows in the signal duration an estimated pitch and an estimated fractional chirp rate of the harmonics at the estimated pitch. The estimated pitch and the estimated fractional chirp rate may then be implemented to determine an estimated pitch for another time sample window in the signal duration with an enhanced accuracy and/or precision.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: November 10, 2015
    Assignee: The Intellisis Corporation
    Inventors: David C. Bradley, Daniel S. Goldin, Rodney Gateau, Nicholas K. Fisher, Robert N. Hilton, Derrick R. Roos, Eric Wiewiora
  • Patent number: 9177560
    Abstract: A system and method may be configured to reconstruct an audio signal from transformed audio information. The audio signal may be resynthesized based on individual harmonics and corresponding pitches determined from the transformed audio information. Noise may be subtracted from the transformed audio information by interpolating across peak points and across trough points of harmonic pitch paths through the transformed audio information, and subtracting values associated with the trough point interpolations from values associated with the peak point interpolations. Noise between harmonics of the sound may be suppressed in the transformed audio information by centering functions at individual harmonics in the transformed audio information, the functions serving to suppress noise between the harmonics.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: November 3, 2015
    Assignee: The Intellisis Corporation
    Inventors: David C. Bradley, Daniel S. Goldin, Robert N. Hilton, Nicholas K. Fisher, Rodney Gateau
  • Patent number: 9177561
    Abstract: A system and method may be configured to reconstruct an audio signal from transformed audio information. The audio signal may be resynthesized based on individual harmonics and corresponding pitches determined from the transformed audio information. Noise may be subtracted from the transformed audio information by interpolating across peak points and across trough points of harmonic pitch paths through the transformed audio information, and subtracting values associated with the trough point interpolations from values associated with the peak point interpolations. Noise between harmonics of the sound may be suppressed in the transformed audio information by centering functions at individual harmonics in the transformed audio information, the functions serving to suppress noise between the harmonics.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: November 3, 2015
    Assignee: The Intellisis Corporation
    Inventors: David C. Bradley, Daniel S. Goldin, Robert N. Hilton, Nicholas K. Fisher, Rodney Gateau
  • Patent number: 9142220
    Abstract: A system and method may be configured to reconstruct an audio signal from transformed audio information. The audio signal may be resynthesized based on individual harmonics and corresponding pitches determined from the transformed audio information. Noise may be subtracted from the transformed audio information by interpolating across peak points and across trough points of harmonic pitch paths through the transformed audio information, and subtracting values associated with the trough point interpolations from values associated with the peak point interpolations. Noise between harmonics of the sound may be suppressed in the transformed audio information by centering functions at individual harmonics in the transformed audio information, the functions serving to suppress noise between the harmonics.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: September 22, 2015
    Assignee: The Intellisis Corporation
    Inventors: David C. Bradley, Daniel S. Goldin, Robert N. Hilton, Nicholas K. Fisher, Rodney Gateau
  • Patent number: 9058820
    Abstract: Speech portions of a sound model may be identified using various statistics associated with the sound model for voice enhancement of noisy audio signals. A spectral motion transform may be performed on an input signal to obtain a linear fit in time of a sound model of the input signal. Statistics may be extracted from the linear fit of the sound model of the input signal. Speech portions of the linear fit of the sound model of the input signal may be identified by detecting a presence of harmonics as a function of time in the linear fit of the sound model of the input signal based on individual ones of the extracted statistics. An output signal may be provided that conveys audio comprising a reconstructed speech component of the input signal with a noise component of the input signal being suppressed.
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: June 16, 2015
    Assignee: The Intellisis Corporation
    Inventors: Massimo Mascaro, David C. Bradley
  • Publication number: 20150120285
    Abstract: A system and method may be configured to reconstruct an audio signal from transformed audio information. The audio signal may be resynthesized based on individual harmonics and corresponding pitches determined from the transformed audio information. Noise may be subtracted from the transformed audio information by interpolating across peak points and across trough points of harmonic pitch paths through the transformed audio information, and subtracting values associated with the trough point interpolations from values associated with the peak point interpolations. Noise between harmonics of the sound may be suppressed in the transformed audio information by centering functions at individual harmonics in the transformed audio information, the functions serving to suppress noise between the harmonics.
    Type: Application
    Filed: January 9, 2015
    Publication date: April 30, 2015
    Applicant: The Intellisis Corporation
    Inventors: David C. BRADLEY, Daniel S. GOLDIN, Robert N. HILTON, Nicholas K. FISHER, Rodney GATEAU
  • Publication number: 20150112688
    Abstract: A system and method may be configured to reconstruct an audio signal from transformed audio information. The audio signal may be resynthesized based on individual harmonics and corresponding pitches determined from the transformed audio information. Noise may be subtracted from the transformed audio information by interpolating across peak points and across trough points of harmonic pitch paths through the transformed audio information, and subtracting values associated with the trough point interpolations from values associated with the peak point interpolations. Noise between harmonics of the sound may be suppressed in the transformed audio information by centering functions at individual harmonics in the transformed audio information, the functions serving to suppress noise between the harmonics.
    Type: Application
    Filed: December 22, 2014
    Publication date: April 23, 2015
    Applicant: THE INTELLISIS CORPORATION
    Inventors: David C. BRADLEY, Daniel S. GOLDIN, Robert N. HILTON, Nicholas K. FISHER, Rodney GATEAU
  • Publication number: 20140376727
    Abstract: A system and method are provided for processing sound signals. The processing may include identifying individual harmonic sounds represented in sound signals, determining sound parameters of harmonic sounds, classifying harmonic sounds according to source, and/or other processing. The processing may include transforming the sound signals (or portions thereof) into a space which expresses a transform coefficient as a function of frequency and chirp rate. This may facilitate leveraging of the fact that the individual harmonics of a single harmonic sound may have a common pitch velocity (which is related to the chirp rate) across all of its harmonics in order to distinguish an the harmonic sound from other sounds (harmonic and/or non-harmonic) and/or noise.
    Type: Application
    Filed: June 30, 2014
    Publication date: December 25, 2014
    Inventors: David C. BRADLEY, Daniel S. GOLDIN, Robert N. HILTON, Nicholas K. FISHER, Rodney GATEAU, Derrick R. Roos, Eric WIEWIORA
  • Publication number: 20140376730
    Abstract: A system and method may be provided to segment and/or classify an audio signal from transformed audio information. Transformed audio information representing a sound may be obtained. The transformed audio information may specify magnitude of a coefficient related to energy amplitude as a function of frequency for the audio signal and time. Features associated with the audio signal may be obtained from the transformed audio information. Individual ones of the features may be associated with a feature score relative to a predetermined speaker model. An aggregate score may be obtained based on the feature scores according to a weighting scheme. The weighting scheme may be associated with a noise and/or SNR estimation. The aggregate score may be used for segmentation to identify portions of the audio signal containing speech of one or more different speakers. For classification, the aggregate score may be used to determine a likely speaker model to identify a source of the sound in the audio signal.
    Type: Application
    Filed: September 10, 2014
    Publication date: December 25, 2014
    Inventors: David C. BRADLEY, Robert N. HILTON, Daniel S. GOLDIN, Nicholas K. FISHER, Derrick R. ROOS, Eric WIEWIORA
  • Patent number: 8849663
    Abstract: A system and method may be provided to segment and/or classify an audio signal from transformed audio information. Transformed audio information representing a sound may be obtained. The transformed audio information may specify magnitude of a coefficient related to energy amplitude as a function of frequency for the audio signal and time. Features associated with the audio signal may be obtained from the transformed audio information. Individual ones of the features may be associated with a feature score relative to a predetermined speaker model. An aggregate score may be obtained based on the feature scores according to a weighting scheme. The weighting scheme may be associated with a noise and/or SNR estimation. The aggregate score may be used for segmentation to identify portions of the audio signal containing speech of one or more different speakers. For classification, the aggregate score may be used to determine a likely speaker model to identify a source of the sound in the audio signal.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: September 30, 2014
    Assignee: The Intellisis Corporation
    Inventors: David C. Bradley, Robert N. Hilton, Daniel S. Goldin, Nicholas K. Fisher, Derrick R. Roos, Eric Wiewiora
  • Patent number: 8767978
    Abstract: A system and method are provided for processing sound signals. The processing may include identifying individual harmonic sounds represented in sound signals, determining sound parameters of harmonic sounds, classifying harmonic sounds according to source, and/or other processing. The processing may include transforming the sound signals (or portions thereof) into a space which expresses a transform coefficient as a function of frequency and chirp rate. This may facilitate leveraging of the fact that the individual harmonics of a single harmonic sound may have a common pitch velocity (which is related to the chirp rate) across all of its harmonics in order to distinguish an the harmonic sound from other sounds (harmonic and/or non-harmonic) and/or noise.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: July 1, 2014
    Assignee: The Intellisis Corporation
    Inventors: David C. Bradley, Daniel S. Goldin, Robert N. Hilton, Nicholas K. Fisher, Rodney Gateau, Derrick R. Roos, Eric Wiewiora
  • Publication number: 20140086420
    Abstract: A system and method may be configured to analyze audio information derived from an audio signal. The system and method may track sound pitch across the audio signal. The tracking of pitch across the audio signal may take into account change in pitch by determining at individual time sample windows in the signal duration an estimated pitch and a representation of harmonic envelope at the estimated pitch. The estimated pitch and the representation of harmonic envelope may then be implemented to determine an estimated pitch for another time sample window in the signal duration with an enhanced accuracy and/or precision.
    Type: Application
    Filed: November 25, 2013
    Publication date: March 27, 2014
    Applicant: THE INTELLISIS CORPORATION
    Inventors: David C. Bradley, Rodney Gateau, Daniel S. Goldin, Robert N. Hilton, Nicholas K. Fisher
  • Publication number: 20140037095
    Abstract: A system and method may be configured to process an audio signal. The system and method may track pitch, chirp rate, and/or harmonic envelope across the audio signal, may reconstruct sound represented in the audio signal, and/or may segment or classify the audio signal. A transform may be performed on the audio signal to place the audio signal in a frequency chirp domain that enhances the sound parameter tracking, reconstruction, and/or classification.
    Type: Application
    Filed: September 27, 2013
    Publication date: February 6, 2014
    Applicant: THE INTELLISIS CORPORATION
    Inventors: David C. BRADLEY, Daniel S. GOLDIN, Robert N. HILTON, Nicholas K. FISHER, Rodney GATEAU, Derrick R. ROOS, Eric WIEWIORA