Patents by Inventor Lucas Cristobal Parra

Lucas Cristobal Parra 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: 20200213779
    Abstract: A hearing aid includes: a microphone configured to provide a microphone signal that corresponds with an acoustic stimulus naturally received by a user of the hearing aid; a processing unit coupled to the microphone, the processing unit configured to provide a processed signal based at least on the microphone signal; a speaker coupled to the processing unit, the speaker configured to provide an acoustic signal based on the processed signal; and a sensor configured to measure a neural response of the user to the acoustic stimulus, and to provide a sensor output; wherein the processing unit is configured to detect presence of speech based on the microphone signal, and to process the sensor output and the microphone signal to estimate speech intelligibility; and wherein the processing unit is also configured to adjust a sound processing parameter for the hearing aid based at least on the estimated speech intelligibility.
    Type: Application
    Filed: December 29, 2018
    Publication date: July 2, 2020
    Applicants: GN Hearing A/S, City University of New York
    Inventors: Tobias PIECHOWIAK, Andrew DITTBERNER, Lucas Cristobal PARRA, Ivan Vladimirov IOTZOV
  • Patent number: 9339642
    Abstract: In some embodiments of the present disclosure, systems and methods for effecting a physiological effect are provided. In some embodiments, a system is provided which comprises a plurality of current sources, where each current source having a positive output and a negative output and each being configured to provide a first current. The system may also include a plurality of stimulating electrodes electrically connected with the plurality of current sources such that at least a pair of the stimulating electrodes share at least one output of at least one of the plurality of current sources. The stimulating electrodes may be configured to provide electrical energy to tissue of a patient at the first current. The system may further include at least one sentinel electrode, and a first voltage monitor configured to monitor a first voltage across the at least one sentinel electrode and at least one of the plurality of stimulating electrodes.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: May 17, 2016
    Assignee: Soterix Medical, Inc.
    Inventors: Marom Bikson, Lucas Cristobal Parra, Abhishek Datta, Niranjan Khadka, Shiraz Azar Macuff
  • Publication number: 20150248615
    Abstract: A method of predicting response to a sensory stimulus includes, with a processor, automatically receiving behavioral data representing the response of a first population of subjects to a reference stimulus. Data representing the neurological responses of a second, different population of subjects to the reference sensory stimulus are received and processed to provide group-representative data indicating commonality between the neurological responses of at least two members of the second population. A mapping from the group-representative data to the received behavioral data is produced. Test data representing the neurological responses of a third population of subjects to a test sensory stimulus are received and processed to provide test group-representative data indicating commonality between the neurological responses to the test sensory stimulus of at least two members of the third population. The mapping is applied to the test group-representative data to provide predicted behavioral data.
    Type: Application
    Filed: October 11, 2013
    Publication date: September 3, 2015
    Inventors: Lucas Cristobal Parra, Jacek Piotr Dmochowski
  • Patent number: 8731650
    Abstract: An EEG cap (8) having 64 or 128 electrodes (10) is placed on the head of the subject (11) who is viewing CRT monitor (14). The signals on each channel are amplified by amplifier (17) and sent to an analog-to-digital converter (20). PC (23) captures and records the amplified signals and the signals are processed by signal processing PC (26) performing linear signal processing. The resulting signal is sent back to a feedback/display PC (29) having monitor (14).
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: May 20, 2014
    Assignee: The Trustees of Columbia University in the City of New York
    Inventors: Paul Sajda, Lucas Cristobal Parra
  • Publication number: 20110144522
    Abstract: An EEG cap (8) having 64 or 128 electrodes (10) is placed on the head of the subject (11) who is viewing CRT monitor (14). The signals on each channel are amplified by amplifier (17) and sent to an analog-to-digital converter (20). PC (23) captures and records the amplified signals and the signals are processed by signal processing PC (26) performing linear signal processing. The resulting signal is sent back to a feedback/display PC (29) having monitor (14).
    Type: Application
    Filed: October 5, 2010
    Publication date: June 16, 2011
    Inventors: Paul Sajda, Lucas Cristobal Parra
  • Patent number: 7917336
    Abstract: A computer system that processes mixtures of signals, such as speech and noise sources derived from multiple simultaneous microphone recordings, in order to separate them into their underlying sources. A source separation routine optimizes a filter structure by minimizing cross powers of multiple output channels while enforcing geometric constraints on the filter response. The geometric constraints enforce desired responses for given locations of the underlying sources, based on the assumption that the sources are localized in space.
    Type: Grant
    Filed: January 17, 2002
    Date of Patent: March 29, 2011
    Assignee: Thomson Licensing
    Inventors: Lucas Cristobal Parra, Christopher Vincent Alvino, Clay Douglas Spence, Craig Langdale Fancourt
  • Patent number: 7835787
    Abstract: An EEG cap (8) having 64 or 128 electrodes (10) is placed on the head of the subject (11) who is viewing CRT monitor (14). The signals on each channel are amplified by amplifier (17) and sent to an analog-to-digital converter (20). PC (23) captures and records the amplified signals and the signals are processed by signal processing PC (26) performing linear signal processing. The resulting signal is sent back to a feedback/display PC (29) having monitor (14).
    Type: Grant
    Filed: October 15, 2004
    Date of Patent: November 16, 2010
    Assignee: The Trustees of Columbia University in the City of New York
    Inventors: Paul Sajda, Lucas Cristobal Parra
  • Publication number: 20090326404
    Abstract: An EEG cap (8) having 64 or 128 electrodes (10) is placed on the head of the subject (11) who is viewing CRT monitor (14). The signals on each channel are amplified by amplifier (17) and sent to an analog-to-digital converter (20). PC (23) captures and records the amplified signals and the signals are processed by signal processing PC (26) performing linear signal processing. The resulting signal is sent back to a feedback/display PC (29) having monitor (14).
    Type: Application
    Filed: October 15, 2004
    Publication date: December 31, 2009
    Inventors: Paul Sajda, Lucas Cristobal Parra
  • Patent number: 7603401
    Abstract: A method and apparatus is disclosed for performing blind source separation using convolutive signal decorrelation. For a first embodiment, the method accumulates a length of input signal (mixed signal) that comprises a plurality of independent signals from independent signal sources. The invention then divides the length of input signal into a plurality of T-length periods (windows) and performs a discrete Fourier transform (DFT) on the signal within each T-length period. Thereafter, estimated cross-correlation values are computed using a plurality of the averaged DFT values. A total number of K cross-correlation values are computed, where each of the K values is averaged over N of the T-length periods. Using the cross-correlation values, a gradient descent process computes the coefficients of a FIR filter that will effectively separate the source signals within the input signal. A second embodiment of the invention is directed to on-line processing of the input signal—i.e.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: October 13, 2009
    Assignee: Sarnoff Corporation
    Inventors: Lucas Cristobal Parra, Clay Douglas Spence
  • Patent number: 6898612
    Abstract: A method and apparatus is disclosed for performing blind source separation using convolutive signal decorrelation. For a first embodiment, the method accumulates a length of input signal (mixed signal) that includes a plurality of independent signals from independent signal sources. The invention then divides the length of input signal into a plurality of T-length periods (windows) and performs a discrete Fourier transform (DFT) on the, signal within each T-length period. Thereafter, estimated cross-correlation values are computed using a plurality of the averaged DFT values. A total number of K cross-correlation values are computed, where each of the K values is averaged over N of the T-length periods. Using the cross-correlation values, a gradient descent process computes the coefficients of a finite impulse response (FIR) filter that will effectively separate the source signals within the input signal. A second embodiment of the invention is directed to on-line processing of the input signal—i.e.
    Type: Grant
    Filed: June 20, 2000
    Date of Patent: May 24, 2005
    Assignee: Sarnoff Corporation
    Inventors: Lucas Cristobal Parra, Clay Douglas Spence
  • Publication number: 20040072336
    Abstract: A computer system (108) that processes mixtures of signals, such as speech and noise sources derived from multiple simultaneous microphone recordings, in order to separate them into their underlying sources. A source separation routine (124) optimizes a filter structure by minimizing cross powers of multiple output channels while enforcing geometric constraints on the filter response. The geometric constraints (209, 210, 215, 217) enforce desired responses for given locations of the underlying sources, based on the assumption that the sources are localized in space.
    Type: Application
    Filed: July 29, 2003
    Publication date: April 15, 2004
    Inventors: Lucas Cristobal Parra, Christopher Vincent Alvino, Clay Douglas Spence, Craig Langdale Fancourt