Patents by Inventor Jean Laroche
Jean Laroche 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).
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Patent number: 8618961Abstract: Digital methods and systems for signal processing and filtering are provided. The methods and corresponding systems provide asynchronous conversion of sampling rate frequencies and utilize advanced multistage phasor filters for converting an input signal having a first sampling rate into an output signal sampled in an arbitrary sequence of sampling times. The conversion process provides a sequence of sets of complex numbers representing a filtered version of the input signal. More specifically, the conversion process includes the calculation of values of the output signal by multiplying (e.g., scaling) the sets of complex numbers by a corresponding set of complex phasors, the complex phasors corresponding to the timing of the arbitrary time sequence to obtain a corresponding set of real results with the value of the output signal being the sum of the real results.Type: GrantFiled: March 12, 2013Date of Patent: December 31, 2013Assignee: Audience, Inc.Inventors: Dana Massie, David P. Rossum, Brian Clark, Leonardo Rub, Jean Laroche
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Patent number: 8611552Abstract: Robust feedforward active noise cancellation is provided which can overcome or substantially alleviate problems associated with the diverse and dynamic nature of the surrounding acoustic environment. A multi-faceted analysis is performed to determine the direction (or directions) of propagation of noise in the surrounding acoustic environment. The direction of propagation is then utilized to determine direction-dependent characteristics of the acoustic path between a reference position where the noise is captured and a desired position where the noise is to be cancelled. These characteristics are used to form a feedforward signal adapted to cancel the noise at the desired position. By forming the feedforward signal based on direction-dependent characteristics of the acoustic path, the techniques described herein can achieve optimal noise cancellation at the desired location, regardless of the direction of propagation of the noise.Type: GrantFiled: August 25, 2010Date of Patent: December 17, 2013Assignee: Audience, Inc.Inventors: Carlo Murgia, Carlos Avendano, Jean Laroche
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Patent number: 8611551Abstract: Systems and methods described herein provide for low latency active noise cancellation, which alleviates the problems associated with analog filter circuitry. The present technology utilizes low latency digital signal processing techniques that overcome the high latency conventionally associated with conversion between the analog and digital domains. As a result, low latency active noise cancellation is performed utilizing digital filter circuitry which is not subject to the inaccuracies and drift of analog filter components. In doing so, the present technology provides robust, high quality active noise cancellation.Type: GrantFiled: July 5, 2013Date of Patent: December 17, 2013Assignee: Audience, Inc.Inventors: Dana Massie, Jean Laroche
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Publication number: 20130231925Abstract: The present technology provides a robust noise suppression system that may concurrently reduce noise and echo components in an acoustic signal while limiting the level of speech distortion. A time-domain acoustic signal may be received and be transformed to frequency-domain sub-band signals. Features, such as pitch, may be identified and tracked within the sub-band signals. Initial speech and noise models may be then be estimated at least in part from a probability analysis based on the tracked pitch sources. Speech and noise models may be resolved from the initial speech and noise models and noise reduction may be performed on the sub-band signals. An acoustic signal may be reconstructed from the noise-reduced sub-band signals.Type: ApplicationFiled: April 9, 2013Publication date: September 5, 2013Inventors: Carlos Avendano, Jean Laroche, Michael M. Goodwin, Ludger Solbach
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Patent number: 8526628Abstract: Systems and methods described herein provide for low latency active noise cancellation, which alleviates the problems associated with analog filter circuitry. The present technology utilizes low latency digital signal processing techniques that overcome the high latency conventionally associated with conversion between the analog and digital domains. As a result, low latency active noise cancellation is performed utilizing digital filter circuitry which is not subject to the inaccuracies and drift of analog filter components. In doing so, the present technology provides robust, high quality active noise cancellation.Type: GrantFiled: June 11, 2012Date of Patent: September 3, 2013Assignee: Audience, Inc.Inventors: Dana Massie, Jean Laroche
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Patent number: 8521529Abstract: An input signal is converted to a feature-space representation. The feature-space representation is projected onto a discriminant subspace using a linear discriminant analysis transform to enhance the separation of feature clusters. Dynamic programming is used to find global changes to derive optimal cluster boundaries. The cluster boundaries are used to identify the segments of the audio signal.Type: GrantFiled: April 18, 2005Date of Patent: August 27, 2013Assignee: Creative Technology LtdInventors: Michael M. Goodwin, Jean Laroche
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Patent number: 8447045Abstract: The present technology provides systems and methods for robust feedforward active noise cancellation which can overcome or substantially alleviate problems associated with the diverse and dynamic nature of the surrounding acoustic environment. A multi-faceted analysis decouples the background noise within the earpiece from the acoustic wave (e.g. the anti-noise and desired audio) generated by an audio transducer within the earpiece. A difference signal is formed utilizing monitoring signals captured by array of monitoring microphones within the earpiece. The difference signal is formed such that contributions due to the acoustic wave generated by the audio transducer are selectively attenuated. As a result, the difference signal indicates an acoustic energy level of the background noise within the earpiece.Type: GrantFiled: September 7, 2010Date of Patent: May 21, 2013Assignee: Audience, Inc.Inventor: Jean Laroche
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Patent number: 8447596Abstract: The present technology provides a robust noise suppression system that may concurrently reduce noise and echo components in an acoustic signal while limiting the level of speech distortion. An acoustic signal may be received and transformed to cochlear domain sub-band signals. Features, such as pitch, may be identified and tracked within the sub-band signals. Initial speech and noise models may be then be estimated at least in part from a probability analysis based on the tracked pitch sources. Speech and noise models may be resolved from the initial speech and noise models and noise reduction may be performed on the sub-band signals. An acoustic signal may be reconstructed from the noise-reduced sub-band signals.Type: GrantFiled: August 20, 2010Date of Patent: May 21, 2013Assignee: Audience, Inc.Inventors: Carlos Avendano, Jean Laroche, Michael M. Goodwin, Ludger Solbach
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Patent number: 8374355Abstract: An audio signal is processed by transforming the signal into a frequency domain representation having a plurality of frequency subbands. A decorrelated signal is derived from the frequency domain representation using a phase rotation.Type: GrantFiled: April 7, 2008Date of Patent: February 12, 2013Assignee: Creative Technology Ltd.Inventors: Jean LaRoche, Michael M. Goodwin
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Patent number: 8345899Abstract: A frequency domain method for phase-amplitude matrixed surround decoding of 2-channel stereo recordings and soundtracks, based on spatial analysis of 2-D or 3-D directional cues in the recording and re-synthesis of these cues for reproduction on any headphone or loudspeaker playback system.Type: GrantFiled: March 12, 2008Date of Patent: January 1, 2013Assignee: Creative Technology LtdInventors: Juha Merimaa, Jean-Marc Jot, Michael M. Goodwin, Arvindh Krishnaswamy, Jean Laroche
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Patent number: 8219390Abstract: A system and method are disclosed for modifying an audio signal. A pitch associated with the audio signal is detected. A portion of the audio signal that is associated with the detected pitch is modified. Controlling the modification of a primary audio signal is disclosed. The level of a secondary audio signal is monitored. Modification of the primary audio signal is enabled if the level of the secondary audio signal rises above a first prescribed threshold at a time when the primary audio signal is not being modified. Modification of the primary audio signal is disabled if the level of the secondary audio signal drops below a second prescribed threshold at a time when the primary audio signal is being modified.Type: GrantFiled: September 16, 2003Date of Patent: July 10, 2012Assignee: Creative Technology LtdInventor: Jean Laroche
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Publication number: 20120010881Abstract: The present technology provides a robust noise suppression system which may concurrently reduce noise and echo components in an acoustic signal while limiting the level of speech distortion. An acoustic signal may be received and transformed to cochlear domain sub-band signals. Features such as pitch may be identified and tracked within the sub-band signals. Initial speech and noise models may be then be estimated at least in part from a probability analysis based on the tracked pitch sources. Speech and noise models may be resolved from the initial speech and noise models and noise reduction may be performed on the sub-band signals and an acoustic signal may be reconstructed from the noise-reduced sub-band signals.Type: ApplicationFiled: August 20, 2010Publication date: January 12, 2012Inventors: Carlos Avendano, Jean Laroche, Michael M. Goodwin, Ludger Solbach
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Publication number: 20080247558Abstract: An audio signal is processed by transforming the signal into a frequency domain representation having a plurality of frequency subbands. A decorrelated signal is derived from the frequency domain representation using a phase rotation.Type: ApplicationFiled: April 7, 2008Publication date: October 9, 2008Applicant: CREATIVE TECHNOLOGY LTDInventors: Jean LAROCHE, Michael M. GOODWIN
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Publication number: 20080205676Abstract: A frequency domain method for phase-amplitude matrixed surround decoding of 2-channel stereo recordings and soundtracks, based on spatial analysis of 2-D or 3-D directional cues in the recording and re-synthesis of these cues for reproduction on any headphone or loudspeaker playback system.Type: ApplicationFiled: March 12, 2008Publication date: August 28, 2008Applicant: CREATIVE TECHNOLOGY LTDInventors: Juha MERIMAA, Jean-Marc JOT, Michael M. GOODWIN, Arvindh KRISHNASWAMY, Jean LAROCHE
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Publication number: 20080033730Abstract: A digital signal is processed by splitting it into at least two frequency subbands and the two subband signals are downsampled. A filter is applied in at least one of the subband signals. At least one of the phase and magnitude of the subband filtered signals is matched in the transition frequency band between the two subbands.Type: ApplicationFiled: August 6, 2007Publication date: February 7, 2008Applicant: CREATIVE TECHNOLOGY LTDInventors: Jean-Marc JOT, Martin WALSH, Jean LAROCHE, Mark PHILLIPS, Michael CHORN, Micheal GOODWIN
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Publication number: 20070258603Abstract: A frequency band of an audio input signal is analyzed to determine if a transient is present. When transients are detected, modifications are made to the intensity levels corresponding to the frequency band for a brief time period.Type: ApplicationFiled: May 4, 2007Publication date: November 8, 2007Applicant: CREATIVE TECHNOLOGY LTDInventors: Carlos Avendano, Jean Laroche, Michael M. Goodwin
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Publication number: 20070237341Abstract: Embodiments may find applications to ambient noise attenuation in cell phones, for example, where a second microphone is placed at a distance from the voice microphone so that ambient noise is present at both the voice microphone and the second microphone, but where the user's voice is primarily picked up at the voice microphone. Frequency domain filtering is employed on the voice signal, so that those frequency components representing mainly ambient noise are de-emphasized relative to the other frequency components. Other embodiments are described and claimed.Type: ApplicationFiled: April 5, 2006Publication date: October 11, 2007Inventor: Jean Laroche
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Patent number: 7248934Abstract: A method and apparatus for printing a one-dimensional, continuous signal, such as a sound wave, as a printed pattern and for recovering the sound wave from the printed pattern. The method decomposes the one dimensional signal two-dimensional function that is continuous in both dimensions. The two-dimensional function can be printed as a pattern on to a paper substrate using a standard printer. The audio signal is recovered by scanning the pattern and processing the scanned values.Type: GrantFiled: October 31, 2000Date of Patent: July 24, 2007Assignee: Creative Technology LtdInventors: David Rossum, Mark Dolson, Jean LaRoche, Wong Hoo Sim
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Publication number: 20060085188Abstract: An input signal is converted to a feature-space representation. The feature-space representation is projected onto a discriminant subspace using a linear discriminant analysis transform to enhance the separation of feature clusters. Dynamic programming is used to find global changes to derive optimal cluster boundaries. The cluster boundaries are used to identify the segments of the audio signal.Type: ApplicationFiled: April 18, 2005Publication date: April 20, 2006Applicant: CREATIVE TECHNOLOGY LTD.Inventors: Michael Goodwin, Jean Laroche
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Patent number: 6868377Abstract: A method and apparatus to inexpensively and efficiently process audio and speech signals. A method for processing a signal having at least one region of interest is provided. The method begins by dividing the signal into a plurality of sub-band signals, wherein a selected sub-band signal includes the region of interest. The selected sub-band is processed by a phase vocoder to produce a vocoder output signal. Next, at least a portion of the subbands are time-aligned with the vocoder output signal. Finally, the aligned sub-band signals and the vocoder output signal are combined to form an output signal.Type: GrantFiled: November 23, 1999Date of Patent: March 15, 2005Assignee: Creative Technology Ltd.Inventor: Jean Laroche