Patents by Inventor Murali Mohan DESHPANDE

Murali Mohan DESHPANDE 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).

  • Multibeam keyword detection system and method
    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
  • MULTIBEAM KEYWORD DETECTION SYSTEM AND METHOD
    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
  • Predictive acoustic echo cancellation
    Patent number: 10937409
    Abstract: A method for echo cancellation based on microphone signal correlation is disclosed.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: March 2, 2021
    Assignee: Knowles Electronics, LLC
    Inventors: Murali Mohan Deshpande, Harinarayanan Erumbi Vallabhan
  • PREDICTIVE ACOUSTIC ECHO CANCELLATION
    Publication number: 20200152167
    Abstract: A method for echo cancellation based on microphone signal correlation is disclosed.
    Type: Application
    Filed: November 8, 2019
    Publication date: May 14, 2020
    Applicant: KNOWLES ELECTRONICS, LLC
    Inventors: Murali Mohan DESHPANDE, Harinarayanan Erumbi VALLABHAN
  • Adaptive acoustic echo delay estimation
    Patent number: 10636410
    Abstract: A method for acoustic echo cancellation is disclosed herein. A microphone receives a second acoustic signal from a near-end environment, the second acoustic signal including a delayed version of the first acoustic signal from a far-end environment. A processor models a relationship between the first acoustic signal and the second acoustic signal using an adaptive filter. The adaptive filter uses sampling points of the first acoustic signal and the second acoustic signal along a timeline as inputs. The processor identifies a sampling point among the sampling points, wherein weight values of the adaptive filter associated with the identified sampling point experience a significant increase (e.g., 50% increase). The identified sampling point along the timeline represents an estimated delay between the first acoustic signal and the second acoustic signal. The processor further removes the delayed version of the first acoustic signal from the second acoustic signal based on the estimated delay.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: April 28, 2020
    Assignee: Knowles Electronics, LLC
    Inventors: Murali Mohan Deshpande, Sarath Pattathil
  • ADAPTIVE ACOUSTIC ECHO DELAY ESTIMATION
    Publication number: 20180366101
    Abstract: A method for acoustic echo cancellation is disclosed herein. A microphone receives a second acoustic signal from a near-end environment, the second acoustic signal including a delayed version of the first acoustic signal from a far-end environment. A processor models a relationship between the first acoustic signal and the second acoustic signal using an adaptive filter. The adaptive filter uses sampling points of the first acoustic signal and the second acoustic signal along a timeline as inputs. The processor identifies a sampling point among the sampling points, wherein weight values of the adaptive filter associated with the identified sampling point experience a significant increase (e.g., 50% increase). The identified sampling point along the timeline represents an estimated delay between the first acoustic signal and the second acoustic signal. The processor further removes the delayed version of the first acoustic signal from the second acoustic signal based on the estimated delay.
    Type: Application
    Filed: May 31, 2018
    Publication date: December 20, 2018
    Applicant: Knowles Electronics, LLC
    Inventors: Murali Mohan DESHPANDE, Sarath PATTATHIL