Patents by Inventor Harinarayanan Erumbi Vallabhan

Harinarayanan Erumbi Vallabhan 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).

  • 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
  • Directional audio capture
    Patent number: 9838784
    Abstract: Systems and methods for improving performance of a directional audio capture system are provided. An example method includes correlating phase plots of at least two audio inputs, with the audio inputs being captured by at least two microphones. The method can further include generating, based on the correlation, estimates of salience at different directional angles to localize a direction of a source of sound. The method can allow providing cues to the directional audio capture system based on the estimates. The cues include attenuation levels. A rate of change of the levels of attenuation is controlled by attack and release time constants to avoid sound artifacts. The method also includes determining a mode based on an absence or presence of one or more peaks in the estimates of salience. The method also provides for configuring the directional audio capture system based on the determined mode.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: December 5, 2017
    Assignee: Knowles Electronics, LLC
    Inventors: Harinarayanan Erumbi Vallabhan, Shailesh Sakri, Carlos Avendano, Ludger Solbach
  • DIRECTIONAL AUDIO CAPTURE
    Publication number: 20160094910
    Abstract: Systems and methods for improving performance of a directional audio capture system are provided. An example method includes correlating phase plots of at least two audio inputs, with the audio inputs being captured by at least two microphones. The method can further include generating, based on the correlation, estimates of salience at different directional angles to localize a direction of a source of sound. The method can allow providing cues to the directional audio capture system based on the estimates. The cues include attenuation levels. A rate of change of the levels of attenuation is controlled by attack and release time constants to avoid sound artifacts. The method also includes determining a mode based on an absence or presence of one or more peaks in the estimates of salience. The method also provides for configuring the directional audio capture system based on the determined mode.
    Type: Application
    Filed: December 2, 2015
    Publication date: March 31, 2016
    Inventors: Harinarayanan Erumbi Vallabhan, Shailesh Sakri, Carlos Avendano, Ludger Solbach