Patents by Inventor Alexandre Guerin

Alexandre Guerin 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).

  • Patent number: 11349560
    Abstract: A method for determining a maximum transmission power (Pmax, PR, PO) of a non-geostationary satellite (NGSO1, NGSO2) in the direction of a ground station (GSO_SOL), includes the steps of: determining the minimum value of a topocentric angle (?NGSO1, ?NGSO2), formed between the non-geostationary satellite, the ground station and a point of the geostationary arc (ARC_GSO); comparing, in terms of absolute value, the minimum value of the topocentric angle with at least two threshold values (?r, ?o), such that: if it is less than the first threshold (?r), defining the maximum transmission power at a first value (PR), if it is between the first threshold and the second threshold (?o), defining the maximum transmission power at a second value (PO), greater than the first value, or if it is greater than the second threshold, defining the maximum power at a third value (Pmax), greater than the second value; the maximum transmission power values and the thresholds being determined so as to minimize the deviation betwee
    Type: Grant
    Filed: July 23, 2020
    Date of Patent: May 31, 2022
    Assignee: THALES
    Inventors: Jean-Christophe Levy, Arnaud Guerin, Alexandre Guerin
  • Publication number: 20220132262
    Abstract: A method for interpolating a sound field captured by a plurality of N microphones each outputting the encoded sound field in a form including at least one captured pressure and an associated pressure gradient vector. Such a method includes an interpolation of the sound field at an interpolation position outputting an interpolated encoded sound field as a linear combination of the N encoded sound fields each weighted by a corresponding weighting factor. The interpolation includes an estimation of the N weighting factors at least from: the interpolation position; a position of each of the N microphones; the N pressures captured by the N microphones; and an estimated power of the sound field at the interpolation position.
    Type: Application
    Filed: December 13, 2019
    Publication date: April 28, 2022
    Inventor: Alexandre Guérin
  • Patent number: 11166290
    Abstract: A method for determining operational constraints for a first constellation of non-geostationary satellites (CONS_I) transmitting towards a terrestrial station (SV) with respect to a second constellation of non-geostationary satellites (CONS_V) linked with the station, the constraints comprising a maximum transmission power of the satellites of the first constellation, the method includes determining triplets of limit values (?, ?, I/N) of two angles (?, ?) and of an interference-to-noise ratio (I/N), the angles (?, ?) defining a position of a satellite (NGSO_I) of the first constellation relative to the station and to a satellite (NGSO_V) of the second constellation and the interference-to-noise ratio being the ratio between interferences (I) transmitted by the first constellation on a link between the station and the satellite of the second constellation and the noise (N) of the link, the determination of the triplets being performed so that a distribution of signal-to-noise and interference ratios (R) aggre
    Type: Grant
    Filed: July 22, 2020
    Date of Patent: November 2, 2021
    Assignee: THALES
    Inventors: Jean-Christophe Levy, Arnaud Guerin, Alexandre Guerin
  • Publication number: 20210256990
    Abstract: Processing acoustic signals to detect sound sources in a sound scene. The method includes: obtaining a plurality of signals representative of the sound scene, captured by a plurality of microphones of predefined positions; based on the signals captured by the microphones and on the positions of the microphones, applying a quantization of directional measurements of sound intensity and establishing a corresponding acoustic activity map in a sound source localization space, the space being of dimension N; constructing at least one vector basis of dimension less than N; projecting the acoustic activity map onto at least one axis of the vector basis; and searching for at least one local peak of acoustic activity in the map projection, an identified local peak corresponding to the presence of a sound source in the scene.
    Type: Application
    Filed: June 7, 2019
    Publication date: August 19, 2021
    Inventors: Alexandre GUERIN, Srdan KITIC, Arnaud LEFORT
  • Patent number: 11081126
    Abstract: A method for processing sound data for separating N sound sources of a multichannel sound signal sensed in a real medium. The method includes: separating sources to the sensed multichannel signal and obtaining a separation matrix and a set of M sound components, with M?N; calculating a set of bi-variate first descriptors representative of statistical relations between the components of the pairs of the set obtained of M components, calculating a set of uni-variate second descriptors representative of characteristics of encoding of the components of the set obtained of M components; and classifying the components of the set of M components, according to two classes of components, a first class of N direct components corresponding to the N direct sound sources and a second class of M?N reverberated components, by calculating probability of membership in one of the two classes, dependent on the sets of first and second descriptors.
    Type: Grant
    Filed: May 24, 2018
    Date of Patent: August 3, 2021
    Inventors: Mathieu Baque, Alexandre Guerin
  • Publication number: 20210037539
    Abstract: A method for determining operational constraints for a first constellation of non-geostationary satellites (CONS_I) transmitting towards a terrestrial station (SV) with respect to a second constellation of non-geostationary satellites (CONS_V) linked with the station, the constraints comprising a maximum transmission power of the satellites of the first constellation, the method includes determining triplets of limit values (?, ?, I/N) of two angles (?, ?) and of an interference-to-noise ratio (I/N), the angles (?, ?) defining a position of a satellite (NGSO_I) of the first constellation relative to the station and to a satellite (NGSO_V) of the second constellation and the interference-to-noise ratio being the ratio between interferences (I) transmitted by the first constellation on a link between the station and the satellite of the second constellation and the noise (N) of the link, the determination of the triplets being performed so that a distribution of signal-to-noise and interference ratios (R) aggre
    Type: Application
    Filed: July 22, 2020
    Publication date: February 4, 2021
    Inventors: Jean-Christophe LEVY, Arnaud GUERIN, Alexandre GUERIN
  • Publication number: 20210036771
    Abstract: A method for determining a maximum transmission power (Pmax, PR, PO) of a non-geostationary satellite (NGSO1, NGSO2) in the direction of a ground station (GSO_SOL), includes the steps of: determining the minimum value of a topocentric angle (?NGSO1, ?NGSO2), formed between the non-geostationary satellite, the ground station and a point of the geostationary arc (ARC_GSO); comparing, in terms of absolute value, the minimum value of the topocentric angle with at least two threshold values (?r, ?o), such that: if it is less than the first threshold (?r), defining the maximum transmission power at a first value (PR), if it is between the first threshold and the second threshold (?o), defining the maximum transmission power at a second value (PO), greater than the first value, or if it is greater than the second threshold, defining the maximum power at a third value (Pmax), greater than the second value; the maximum transmission power values and the thresholds being determined so as to minimize the deviation betwee
    Type: Application
    Filed: July 23, 2020
    Publication date: February 4, 2021
    Inventors: Jean-Christophe LEVY, Arnaud GUERIN, Alexandre GUERIN
  • Patent number: 10687164
    Abstract: A method implemented by a processing device for processing an ambisonic content including a plurality of ambisonic components of a plurality of orders defining a succession of ambisonic channels in each of which an ambisonic component is represented. The method includes: frequency filtering of the ambisonic components in a plurality of frequency bands, compiling an ambisonic decoding matrix, processing the ambisonic decoding matrix in order to extract, by matrix dimension reduction, a plurality of ambisonic decoding sub-matrices each associated with an ambisonic order and a frequency band selected for this ambisonic order, respective applications of the decoding sub-matrices to the ambisonic components in each selected frequency band, and a reconstruction, band by band, of the results of said respective applications, in order to deliver a plurality of decoded signals, each associated with a sound source.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: June 16, 2020
    Assignee: ORANGE
    Inventors: Mathieu Baque, Alexandre Guerin
  • Publication number: 20200152222
    Abstract: A method for processing sound data for separating N sound sources of a multichannel sound signal sensed in a real medium. The method includes: separating sources to the sensed multichannel signal and obtaining a separation matrix and a set of M sound components, with M?N; calculating a set of bi-variate first descriptors representative of statistical relations between the components of the pairs of the set obtained of M components, calculating a set of uni-variate second descriptors representative of characteristics of encoding of the components of the set obtained of M components; and classifying the components of the set of M components, according to two classes of components, a first class of N direct components corresponding to the N direct sound sources and a second class of M?N reverberated components, by calculating probability of membership in one of the two classes, dependent on the sets of first and second descriptors.
    Type: Application
    Filed: May 24, 2018
    Publication date: May 14, 2020
    Inventors: Mathieu Baque, Alexandre Guerin
  • Publication number: 20190335291
    Abstract: A method implemented by a processing device for processing an ambisonic content including a plurality of ambisonic components of a plurality of orders defining a succession of ambisonic channels in each of which an ambisonic component is represented. The method includes: frequency filtering of the ambisonic components in a plurality of frequency bands, compiling an ambisonic decoding matrix, processing the ambisonic decoding matrix in order to extract, by matrix dimension reduction, a plurality of ambisonic decoding sub-matrices each associated with an ambisonic order and a frequency band selected for this ambisonic order, respective applications of the decoding sub-matrices to the ambisonic components in each selected frequency band, and a reconstruction, band by band, of the results of said respective applications, in order to deliver a plurality of decoded signals, each associated with a sound source.
    Type: Application
    Filed: December 15, 2017
    Publication date: October 31, 2019
    Inventors: Mathieu Baque, Alexandre Guerin
  • Patent number: 9641157
    Abstract: A method and device are provided for filtering digital audio signals using at least one ARMA filter, particularly during a filter change. The method includes the following steps: a step of receiving a first request to change filtering to or from filtering by a first ARMA filter; and, in response to the first request, a step of gradually switching, at each of a plurality of cascaded first filtering blocks, between digital-signal filtering by a first basic filtering cell and digital-signal filtering by another associated basic filtering cell, the first basic filtering cells of the plurality of first filtering blocks factorizing the first filter.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: May 2, 2017
    Assignee: ORANGE
    Inventors: Alexandre Guerin, Julien Faure, Claude Marro
  • Patent number: 9031245
    Abstract: A method and device are provided for detecting acoustic shocks in an audio stream. The method includes: breaking down the audio stream into audio frames; analyzing the audio frames in order to assign each audio frame a category value from among a plurality of predefined values; and determining the probability of an acoustic shock occurring in a current frame, based on a sequence of a given length of category values assigned to a set of frames, using a two-state Markov model, defined by a predetermined transition matrix and transmission matrix.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: May 12, 2015
    Assignee: France Telecom
    Inventors: Julien Faure, Alexandre Guerin, Claude Marro
  • Patent number: 8976895
    Abstract: Method for calibrating a linearizer and linearized electronic component the method comprises predistortion, in a predistortion linearizer, of a signal upstream of an electronic component to compensate nonlinear distortion. Determining predistortion setting parameters comprises applying a bifrequency test signal to the component and measuring the relative amplitudes of the lines at the output of the component. A variable indicative of the magnitude |Kp| of the AM/PM conversion coefficient of the component is calculated on the basis of these measurements. The predistortion setting parameters are adjusted so as to minimize |Kp|. The method may in particular be implemented in a linearized amplifier device and in an amplifier test bench.
    Type: Grant
    Filed: May 29, 2013
    Date of Patent: March 10, 2015
    Assignee: Centre National d'Etudes Spatiales
    Inventors: Jacques Sombrin, Xavier Giraud, Alexandre Guerin, Guy Lesthievent, Jean-Pierre Millerioux, Xavier Deplancq
  • Patent number: 8880413
    Abstract: The invention is aimed at improving the quality of the filtering by transfer functions of HRTF type of signals (L, R) compressed in a transformed domain, for binaural playing on two channels (L-BIN, R-BIN), using a combination of HRTF filters (hL,L, hL,R) including a decorrelated version (HRTF-C*, HRTF-E*) of a few of these filters. For this purpose, a decorrelation cue is given with spatialization parameters (SPAT) accompanying the compressed signals (L, R). The Decorrelation comprises applying a different phase shift to each subband of the input signal combined with addition of an overall delay. The invention makes it possible to improve the broadening in the binaural rendition of audio scenes initially in a multi-channel format.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: November 4, 2014
    Assignee: Orange
    Inventors: David Virette, Alexandre Guerin
  • Publication number: 20140019504
    Abstract: A method and device are provided for filtering digital audio signals using at least one ARMA filter, particularly during a filter change. The method includes the following steps: a step of receiving a first request to change filtering to or from filtering by a first ARMA filter; and, in response to the first request, a step of gradually switching, at each of a plurality of cascaded first filtering blocks, between digital-signal filtering by a first basic filtering cell and digital-signal filtering by another associated basic filtering cell, the first basic filtering cells of the plurality of first filtering blocks factorizing the first filter.
    Type: Application
    Filed: March 14, 2012
    Publication date: January 16, 2014
    Inventors: Alexandre Guerin, Julien Faure, Claude Marro
  • Publication number: 20130336422
    Abstract: Method for calibrating a linearizer and linearized electronic component The method comprises predistortion, in a predistortion linearizer, of a signal upstream of an electronic component to compensate nonlinear distortion. Determining predistortion setting parameters comprises applying a bifrequency test signal to the component and measuring the relative amplitudes of the lines at the output of the component. A variable indicative of the magnitude |Kp| of the AM/PM conversion coefficient of the component is calculated on the basis of these measurements. The predistortion setting parameters are adjusted so as to minimize |Kp|. The method may in particular be implemented in a linearized amplifier device and in an amplifier test bench.
    Type: Application
    Filed: May 29, 2013
    Publication date: December 19, 2013
    Applicant: Centre National d'Etudes Spatiales
    Inventors: Jacques SOMBRIN, Xavier GIRAUD, Alexandre GUERIN, Guy LESTHIEVENT, Jean-Pierre MILLERIOUX, Xavier DEPLANCQ
  • Publication number: 20130101124
    Abstract: A method and device are provided for detecting acoustic shocks in an audio stream. The method includes: breaking down the audio stream into audio frames; analyzing the audio frames in order to assign each audio frame a category value from among a plurality of predefined values; and determining the probability of an acoustic shock occurring in a current frame, based on a sequence of a given length of category values assigned to a set of frames, using a two-state Markov model, defined by a predetermined transition matrix and transmission matrix.
    Type: Application
    Filed: June 17, 2011
    Publication date: April 25, 2013
    Applicant: France Telecom
    Inventors: Julien Faure, Alexandre Guerin, Claude Marro
  • Patent number: 8150027
    Abstract: Coefficients of an adaptive filter representative of an acoustic channel between an emitted acoustic signal and a microphone signal are determined and smoothed in time. An echo is then estimated by filtering the emitted acoustic signal with the smoothed coefficients. Properties of the estimated echo and of the microphone signal are estimated. The echo cancellation filter is controlled as a function of a comparison between the properties of the estimated echo and those of the microphone signal so as to take into account the potential presence of a signal other than an echo signal in the microphone signal.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: April 3, 2012
    Assignee: France Telecom
    Inventors: Alexandre Guerin, Jean-Luc Garcia
  • Patent number: 8128387
    Abstract: A dual drive compressor is disclosed including a discharge chamber having a wall disposed therein forming a plurality of discharge zones within the discharge chamber to attenuate pulsations caused by a fluid received in the compressor and improve a performance of the compressor.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: March 6, 2012
    Assignee: Visteon Global Technologies, Inc.
    Inventors: Rance Andrew Stehouwer, Kanwal Bhatia, Michael Gregory Theodore, Nuno Alexandre Guerin
  • Patent number: 8045718
    Abstract: The invention concerns a method for three-dimensional spatialization of audio channels from a filter BRIR incorporating a theater effect. For a specific number N of samples corresponding to the size of the pulse response of the BRIR filter, it consists in breaking down (A) the BRIR filter into at least a set of delay and amplitude values associated with the times of arrival of reflections; extracting (B) on the number of B samples at least one spectral module of the BRIR filter; and constituting (C) from each successive delay, its amplitude and its spectral module associated with an elementary BRIR filter (BRIRe) directly applied to the audio channels in the time, frequency or transformed domain. The invention is applicable to binaural or multichannel spatialization.
    Type: Grant
    Filed: March 8, 2007
    Date of Patent: October 25, 2011
    Assignee: France Telecom
    Inventors: Julien Faure, Alexandre Guerin, Rozenn Nicol, Gregory Pallone