Patents by Inventor Matthew S. Barnhill
Matthew S. Barnhill 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: 11770651Abstract: Systems and methods utilize a modified genetic algorithm for adapting an off-the-shelf audio system, such as in a high-end television, to a given, particular room or other physical location presenting a specific or unique auditory environment with a set of acoustic properties. An audio system is adapted to a given room by determining an IIR based EQ solution via iterative techniques, including an iterative technique based upon a genetic algorithm adapted for an audio frequency response equalization application. In a variant, an audio system is adapted to a particular room, adjust the EQ across a microphone's bandwidth while preserving the factory-calibrated EQ response across the remaining bandwidth.Type: GrantFiled: October 12, 2021Date of Patent: September 26, 2023Assignee: THAT CorporationInventor: Matthew S. Barnhill
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Publication number: 20220201349Abstract: Systems, methods, and algorithms for estimating the sample clock difference between an audio playback and recording device are described. The sample clock difference can be determined by sequentially playing the same pseudorandom signal and exploiting the statistical properties of said signal in the recording. An exemplary embodiment utilizes a maximum length sequence (MLS) for the pseudorandom signal. While an MLS sequence is a good choice for clock synchronization, it is possible to use other pseudorandom sequences. The sequence preferably has a sharp correlation peak that is clearly discernable with even a single sample shift and be of sufficient length to support the anticipated clock drift.Type: ApplicationFiled: December 16, 2021Publication date: June 23, 2022Applicant: THAT CorporationInventors: Matthew S. Barnhill, Roger R. Darr, Matthew Easley
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Publication number: 20220116704Abstract: Systems and methods utilize a modified genetic algorithm for adapting an off-the-shelf audio system, such as in a high-end television, to a given, particular room or other physical location presenting a specific or unique auditory environment with a set of acoustic properties. An audio system is adapted to a given room by determining an IIR based EQ solution via iterative techniques, including an iterative technique based upon a genetic algorithm adapted for an audio frequency response equalization application. In a variant, an audio system is adapted to a particular room, adjust the EQ across a microphone's bandwidth while preserving the factory-calibrated EQ response across the remaining bandwidth.Type: ApplicationFiled: October 12, 2021Publication date: April 14, 2022Applicant: THAT CorporationInventor: Matthew S. Barnhill
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Patent number: 8958516Abstract: A NICAM audio signal re-sampler may include a non-linear interpolator configured to interpolate in a non-linear manner between sequential digital samples that are based on a stream of demodulated NICAM audio samples. A phase differential calculator may be included that compares phase information at different resolutions.Type: GrantFiled: June 19, 2013Date of Patent: February 17, 2015Assignee: THAT CorporationInventors: Roger R. Darr, Matthew F. Easley, Matthew S. Barnhill
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Patent number: 8582780Abstract: A television audio signal encoder includes a device that sums a left channel audio signal and a right channel audio signal to produce a sum signal. The device also subtracts one of the left and right audio signals from the other to produce a difference signal. The encoder also includes a configurable infinite impulse response digital filter that selectively uses one or more sets of filter coefficients to filter the difference signal. The set of filter coefficients is applied to the difference signal by a single multiplier in a recursive manner to prepare the difference signal for transmission.Type: GrantFiled: October 1, 2010Date of Patent: November 12, 2013Assignee: THAT CorporationInventor: Matthew S. Barnhill
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Publication number: 20130282385Abstract: A NICAM audio signal re-sampler may include a non-linear interpolator configured to interpolate in a non-linear manner between sequential digital samples that are based on a stream of demodulated NICAM audio samples. A phase differential calculator may be included that compares phase information at different resolutions.Type: ApplicationFiled: June 19, 2013Publication date: October 24, 2013Inventors: Roger R. Darr, Matthew F. Easley, Matthew S. Barnhill
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Patent number: 8526622Abstract: Television audio signal encoders include a matrix that sums a left channel audio signal and a right channel audio signal to produce a sum signal. The matrix also subtracts one of the left and right audio signals from the other to produce a difference signal. The encoders also include a configurable infinite impulse response digital filter that selectively uses one or more sets of filter coefficients to filter the difference signal and/or the sum signals. Each selectable set of filter coefficients is associated with a unique filtering application to prepare the difference signal for transmission. Decoders with the matrix are also disclosed.Type: GrantFiled: September 7, 2010Date of Patent: September 3, 2013Assignee: THAT CorporationInventors: Matthew S. Barnhill, Roger R. Darr
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Patent number: 8494104Abstract: A NICAM audio signal re-sampler may include a non-linear interpolator configured to interpolate in a non-linear manner between sequential digital samples that are based on a stream of demodulated NICAM audio samples. A phase differential calculator may be included that compares phase information at different resolutions.Type: GrantFiled: September 19, 2011Date of Patent: July 23, 2013Assignee: THAT CorporationInventors: Roger R. Darr, Matthew F. Easley, Matthew S. Barnhill
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Publication number: 20120008724Abstract: A NICAM audio signal re-sampler may include a non-linear interpolator configured to interpolate in a non-linear manner between sequential digital samples that are based on a stream of demodulated NICAM audio samples. A phase differential calculator may be included that compares phase information at different resolutions.Type: ApplicationFiled: September 19, 2011Publication date: January 12, 2012Applicant: THAT CorporationInventors: Roger R. Darr, Matthew F. Easley, Matthew S. Barnhill
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Patent number: 8023590Abstract: A NICAM audio signal re-sampler may include a non-linear interpolator configured to interpolate in a non-linear manner between sequential digital samples that are based on a stream of demodulated NICAM audio samples. A phase differential calculator may be included that compares phase information at different resolutions.Type: GrantFiled: January 4, 2007Date of Patent: September 20, 2011Assignee: THAT CorporationInventors: Roger R. Darr, Matthew F. Easley, Matthew S. Barnhill
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Patent number: 8014741Abstract: A signal quality estimation and control system for controlling a signal having noise. The system may include a signal strength determination system having an input configured to receive the signal and an output configured to output information indicative of the strength of the signal, a noise strength determination system having an input configured to receive the signal and an output configured to output information indicative of the strength of the noise in the signal, and a signal quality evaluation system. The signal quality evaluation system may have an input configured to receive the output of the signal strength determination system, an input configured to receive the output from the noise strength determination system, and an output configured to output information indicative of the quality of the signal based on the output from the signal strength determination system and the output from the noise strength determination system.Type: GrantFiled: March 31, 2006Date of Patent: September 6, 2011Assignee: THAT CorporationInventor: Matthew S Barnhill
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Patent number: 7929054Abstract: A television audio signal encoder includes an up-sampler that inserts additional samples into a sum signal, a difference signal, and/or a secondary audio program signal to increase the sample rate of the corresponding signal or signals. The sum signal represents the sum of a left channel digital audio signal and a right channel digital audio signal and the difference signal represents the difference between the left and right audio signals.Type: GrantFiled: December 29, 2009Date of Patent: April 19, 2011Assignee: THAT CorporationInventors: Matthew S. Barnhill, Matthew Easley
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Publication number: 20110026719Abstract: A television audio signal encoder includes a device that sums a left channel audio signal and a right channel audio signal to produce a sum signal. The device also subtracts one of the left and right audio signals from the other to produce a difference signal. The encoder also includes a configurable infinite impulse response digital filter that selectively uses one or more sets of filter coefficients to filter the difference signal. The set of filter coefficients is applied to the difference signal by a single multiplier in a recursive manner to prepare the difference signal for transmission.Type: ApplicationFiled: October 1, 2010Publication date: February 3, 2011Applicant: THAT CORPORATIONInventor: Matthew S. Barnhill
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Publication number: 20100103314Abstract: A television audio signal encoder includes an up-sampler that inserts additional samples into a sum signal, a difference signal, and/or a secondary audio program signal to increase the sample rate of the corresponding signal or signals. The sum signal represents the sum of a left channel digital audio signal and a right channel digital audio signal and the difference signal represents the difference between the left and right audio signals.Type: ApplicationFiled: December 29, 2009Publication date: April 29, 2010Applicant: THAT CorporationInventors: Matthew S. Barnhill, Matthew Easley
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Publication number: 20090231491Abstract: A television audio signal encoder includes a matrix that sums a left channel audio signal and a right channel audio signal to produce a sum signal. The matrix also subtracts one of the left and right audio signals from the other to produce a difference signal. The encoder also includes a configurable infinite impulse response digital filter that selectively uses one or more sets of filter coefficients to filter the difference signal. Each selectable set of filter coefficients is associated with a unique filtering application to prepare the difference signal for transmission.Type: ApplicationFiled: May 26, 2009Publication date: September 17, 2009Inventors: Matthew S. Barnhill, Roger Darr