Patents by Inventor Harsha RAO

Harsha RAO 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: 11335331
    Abstract: A system and method provides for multibeam keyword detection. A composite audio signal may include sound components. The system and method groups the sound components into subsets based on the angles of arrival of sound components. Keyword detectors evaluate each subset and determine whether a keyword is present.
    Type: Grant
    Filed: July 24, 2020
    Date of Patent: May 17, 2022
    Assignee: KNOWLES ELECTRONICS, LLC.
    Inventors: Harsha Rao, Malakapati Loka Nagendra Prasad, Hindupur Keerthi Sagar, Pratik Shah, Murali Mohan Deshpande, John Woodruff, Sai Ravi Teja Pulugurtha, Rohit Paturi
  • Publication number: 20220026989
    Abstract: An integrated haptic system may include a digital signal processor and an amplifier communicatively coupled to the digital signal processor and integrated with the digital signal processor into the integrated haptic system. The digital signal processor may be configured to receive a force sensor signal indicative of a force applied to a force sensor and generate a haptic playback signal responsive to the force. The amplifier may be configured to amplify the haptic playback signal and drive a vibrational actuator communicatively coupled to the amplifier with the haptic playback signal as amplified by the amplifier.
    Type: Application
    Filed: October 6, 2021
    Publication date: January 27, 2022
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Harsha RAO, Rong HU, Carl Lennart STÅHL, Jie SU, Vadim KONRADI, Teemu RAMO, Anthony Stephen DOY
  • Patent number: 11139767
    Abstract: According to embodiments described herein, there are provided methods and apparatus for providing a driving signal to a transducer, wherein the driving signal is output by an amplifier. A method comprises receiving an indication of a voltage and a current of the driving signal; based on an electrical model of the transducer and the voltage and the current of the driving signal, estimating an estimated electrical response of the transducer representative of movement of a mass in the transducer; comparing the estimated electrical response to a desired electrical response; and controlling the driving signal based on the comparison.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: October 5, 2021
    Assignee: Cirrus Logic, Inc.
    Inventors: Marco Janko, Harsha Rao, Carl Ståhl, Rong Hu
  • Patent number: 11069206
    Abstract: Embodiments described herein provide methods and apparatus for outputting a haptic signal to a haptic transducer. A method comprises storing a representation of a part of the haptic signal comprising a first information point indicating a first amplitude and at least one first frequency of the part of the haptic signal at a first time, wherein the representation is associated with a user experience; responsive to receiving an indication of occurrence of the user experience, determining the haptic signal based on the first information point such that the part of the haptic signal has the first amplitude and the at least one first frequency at the first time. The method may further comprise outputting the haptic signal to the haptic transducer.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: July 20, 2021
    Assignee: Cirrus Logic, Inc.
    Inventors: Harsha Rao, Kyle Wilkinson, Rong Hu
  • Publication number: 20210201928
    Abstract: Systems and methods are disclosed for processing audio for an electronic device, the electronic device including an integrated speech enhanced voice trigger module that can provide an improvement over existing voice trigger modules by effectively combining together voice trigger techniques and speech enhancement techniques. In various embodiments, the integrated speech enhanced voice trigger module is configured to reduce mismatches in types and levels of noise that are encountered during both voice trigger training and runtime. This can result in a higher true positive rate (TPR), a lower false alarm (FA), and a lower impostor acceptance rate (IAR). The disclosed integrated speech enhanced voice trigger module can be used be used with an electronic device having a single microphone or a plurality of microphones.
    Type: Application
    Filed: December 20, 2020
    Publication date: July 1, 2021
    Inventors: Harsha Rao, Anil Jakkam, Pratik Shah, Stephen Cradock, Sharon Gadonniex, Tianfang Liu
  • Patent number: 11037414
    Abstract: Embodiments described herein provide methods and apparatus for outputting a haptic signal to a haptic transducer. A method comprises storing a representation of a part of the haptic signal comprising a first information point indicating a first amplitude and at least one first frequency of the part of the haptic signal at a first time, wherein the representation is associated with a user experience; responsive to receiving an indication of occurrence of the user experience, determining the haptic signal based on the first information point such that the part of the haptic signal has the first amplitude and the at least one first frequency at the first time. The method may further comprise outputting the haptic signal to the haptic transducer.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: June 15, 2021
    Assignee: Cirrus Logic, Inc.
    Inventors: Harsha Rao, Kyle Wilkinson, Rong Hu
  • Publication number: 20210065686
    Abstract: A system and method provides for multibeam keyword detection. A composite audio signal may include sound components. The system and method groups the sound components into subsets based on the angles of arrival of sound components. Keyword detectors evaluate each subset and determine whether a keyword is present.
    Type: Application
    Filed: July 24, 2020
    Publication date: March 4, 2021
    Applicant: Knowles Electronics, LLC
    Inventors: Harsha RAO, Malakapati Loka Nagendra PRASAD, Hindupur Keerthi SAGAR, Pratik SHAH, Murali Mohan DESHPANDE, John WOODRUFF, Sai Ravi Teja PULUGARTHA, Rohit PATURI
  • Patent number: 10782785
    Abstract: A method for quantifying fidelity of a haptic signal may include receiving a response signal indicative of a vibrational response of a vibrational transducer to a haptic playback waveform driven to the vibrational transducer, perceptually filtering the response signal to obtain human haptic-perceptible components of the response signal, and quantifying fidelity of the haptic playback waveform based on at least one quantitative characteristic of the human haptic-perceptible components of the response signal.
    Type: Grant
    Filed: January 25, 2019
    Date of Patent: September 22, 2020
    Assignee: Cirrus Logic, Inc.
    Inventors: Rong Hu, Jie Su, Harsha Rao
  • Publication number: 20200272239
    Abstract: An integrated haptic system may include a digital signal processor and an amplifier communicatively coupled to the digital signal processor and integrated with the digital signal processor into the integrated haptic system. The digital signal processor may be configured to receive a force sensor signal indicative of a force applied to a force sensor and generate a haptic playback signal responsive to the force. The amplifier may be configured to amplify the haptic playback signal and drive a vibrational actuator communicatively coupled to the amplifier with the haptic playback signal as amplified by the amplifier.
    Type: Application
    Filed: May 11, 2020
    Publication date: August 27, 2020
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Harsha RAO, Rong HU, Carl Lennart STÅHL, Jie SU, Vadim KONRADI, Teemu RAMO, Anthony Stephen DOY
  • Patent number: 10732714
    Abstract: An integrated haptic system may include a digital signal processor and an amplifier communicatively coupled to the digital signal processor and integrated with the digital signal processor into the integrated haptic system. The digital signal processor may be configured to receive a force sensor signal indicative of a force applied to a force sensor and generate a haptic playback signal responsive to the force. The amplifier may be configured to amplify the haptic playback signal and drive a vibrational actuator communicatively coupled to the amplifier with the haptic playback signal as amplified by the amplifier.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: August 4, 2020
    Assignee: Cirrus Logic, Inc.
    Inventors: Harsha Rao, Rong Hu, Carl Lennart Ståhl, Jie Su, Vadim Konradi, Teemu Ramo, Anthony Stephen Doy
  • Publication number: 20190340895
    Abstract: Embodiments described herein provide methods and apparatus for outputting a haptic signal to a haptic transducer. A method comprises storing a representation of a part of the haptic signal comprising a first information point indicating a first amplitude and at least one first frequency of the part of the haptic signal at a first time, wherein the representation is associated with a user experience; responsive to receiving an indication of occurrence of the user experience, determining the haptic signal based on the first information point such that the part of the haptic signal has the first amplitude and the at least one first frequency at the first time. The method may further comprise outputting the haptic signal to the haptic transducer.
    Type: Application
    Filed: February 20, 2019
    Publication date: November 7, 2019
    Inventors: Harsha RAO, Kyle WILKINSON, Rong HU
  • Patent number: 10455325
    Abstract: A method for estimating directions of arrival of audio signals based on categories is disclosed herein. The method includes receiving an audio signal; generating a plurality of filters based on the audio signal, each of the filters corresponding to one of a plurality of sound content categories; separating the audio signal into a plurality of content-based audio signals by applying the filters to the audio signal, each of the content-based audio signals contains a content of a corresponding sound content category among the plurality of sound content categories; for each of the content-based audio signals, generating a direction of arrival (DOA) for a sound source of the content-based audio signal.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: October 22, 2019
    Assignee: Knowles Electronics, LLC
    Inventors: John Woodruff, Pratik Shah, Sai Ravi Teja Pulugurtha, Harsha Rao
  • Publication number: 20190296674
    Abstract: According to embodiments described herein, there is provided methods and apparatus for providing a driving signal to a transducer, wherein the driving signal is output by an amplifier. A method comprises receiving an indication of a voltage and a current of the driving signal; based on an electrical model of the transducer and the voltage and the current of the driving signal, estimating an estimated electrical response of the transducer representative of movement of a mass in the transducer; comparing the estimated electrical response to a desired electrical response; and controlling the driving signal based on the comparison.
    Type: Application
    Filed: December 3, 2018
    Publication date: September 26, 2019
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Marco JANKO, Harsha RAO, Carl STÅHL, Rong HU
  • Publication number: 20190235629
    Abstract: A method for quantifying fidelity of a haptic signal may include receiving a response signal indicative of a vibrational response of a vibrational transducer to a haptic playback waveform driven to the vibrational transducer, perceptually filtering the response signal to obtain human haptic-perceptible components of the response signal, and quantifying fidelity of the haptic playback waveform based on at least one quantitative characteristic of the human haptic-perceptible components of the response signal.
    Type: Application
    Filed: January 25, 2019
    Publication date: August 1, 2019
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Rong HU, Jie SU, Harsha RAO
  • Publication number: 20190222691
    Abstract: The present embodiments are directed to removing echo from an audio signal using a two-stage process. The first stage aims at removing the linear portion of the echo signal that is representative of the acoustic propagation path between a loudspeaker and a microphone, for example. The second stage focuses on removing or suppressing any remaining or residual echo in the audio signal. The residual echo can include both residual linear echo and nonlinear contributions from the system, such as nonlinear echo produced by loudspeakers, amplifiers, microphones or even the body of the device itself. According to certain additional aspects, the echo cancellation and suppression techniques of the embodiments are built on a data-driven approach, where models are trained in both an offline and online process to assist in the detection and suppression of various forms of echo that can exist in a particular near-end environment.
    Type: Application
    Filed: January 17, 2019
    Publication date: July 18, 2019
    Applicant: Knowles Electronics, LLC
    Inventors: Pratik Shah, Mathieu Parvaix, John Woodruff, Harsha Rao
  • Publication number: 20190208317
    Abstract: A method for estimating directions of arrival of audio signals based on categories is disclosed herein. The method includes receiving an audio signal; generating a plurality of filters based on the audio signal, each of the filters corresponding to one of a plurality of sound content categories; separating the audio signal into a plurality of content-based audio signals by applying the filters to the audio signal, each of the content-based audio signals contains a content of a corresponding sound content category among the plurality of sound content categories; for each of the content-based audio signals, generating a direction of arrival (DOA) for a sound source of the content-based audio signal.
    Type: Application
    Filed: December 27, 2018
    Publication date: July 4, 2019
    Applicant: Knowles Electronics, LLC
    Inventors: John Woodruff, Pratik Shah, Sai Ravi Teja Pulugurtha, Harsha Rao
  • Publication number: 20180321748
    Abstract: An integrated haptic system may include a digital signal processor and an amplifier communicatively coupled to the digital signal processor and integrated with the digital signal processor into the integrated haptic system. The digital signal processor may be configured to receive a force sensor signal indicative of a force applied to a force sensor and generate a haptic playback signal responsive to the force. The amplifier may be configured to amplify the haptic playback signal and drive a vibrational actuator communicatively coupled to the amplifier with the haptic playback signal as amplified by the amplifier.
    Type: Application
    Filed: October 2, 2017
    Publication date: November 8, 2018
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Harsha RAO, Rong HU, Carl Lennart STÅHL, Jie SU, Vadim KONRADI, Teemu RAMO, Anthony Stephen Doy
  • Publication number: 20090281519
    Abstract: An automated method and system of diabetes control. The method includes establishing a blood glucose target for an insulin user, measuring an existing blood glucose level for the insulin user, and inputting the existing blood glucose level into a computer processor formed to execute an algorithm designed to calculate a corrective amount of insulin to be administered intravenously in an integrated basal-bolus manner to the insulin user if the existing blood glucose level exceeds the blood glucose target. The algorithm is based on a plurality of factors that contribute to a non-linear glucose response. The method further includes automatically delivering the corrective amount of insulin to the insulin user, and further repeating the measuring, inputting, and delivering steps one or more times to maintain the insulin user within the blood glucose target range.
    Type: Application
    Filed: May 12, 2009
    Publication date: November 12, 2009
    Inventors: R. Harsha RAO, Peter Perreiah, Candace Cunningham