Patents by Inventor Shailesh Sakri

Shailesh Sakri 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: 10257611
    Abstract: Systems and methods for stereo separation and directional suppression are provided. An example method includes receiving a first audio signal, representing sound captured by a first microphone associated with a first location, and a second audio signal, representing sound captured by a second microphone associated with a second location. The microphones comprise omni-directional microphones. The distance between the first and second microphones is limited by the size of a mobile device. A first channel signal of a stereo signal is generated by forming, based on the first and second audio signals, a first beam at the first location. A second channel signal of the stereo signal is generated by forming, based on the first and second audio signals, a second beam at the second location. First and second directions, associated respectively with the first and second beams, are fixed relative to a line between the first and second locations.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: April 9, 2019
    Assignee: Knowles Electronics, LLC
    Inventors: Jonathon Ray, John Woodruff, Shailesh Sakri, Tony Verma
  • Publication number: 20180070174
    Abstract: Systems and methods for stereo separation and directional suppression are provided. An example method includes receiving a first audio signal, representing sound captured by a first microphone associated with a first location, and a second audio signal, representing sound captured by a second microphone associated with a second location. The microphones comprise omni-directional microphones. The distance between the first and second microphones is limited by the size of a mobile device. A first channel signal of a stereo signal is generated by forming, based on the first and second audio signals, a first beam at the first location. A second channel signal of the stereo signal is generated by forming, based on the first and second audio signals, a second beam at the second location. First and second directions, associated respectively with the first and second beams, are fixed relative to a line between the first and second locations.
    Type: Application
    Filed: November 8, 2017
    Publication date: March 8, 2018
    Applicant: Knowles Electronics, LLC
    Inventors: Jonathon Ray, John Woodruff, Shailesh Sakri, Tony Verma
  • 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
  • Patent number: 9820042
    Abstract: Systems and methods for stereo separation and directional suppression are provided. An example method includes receiving a first audio signal, representing sound captured by a first microphone associated with a first location, and a second audio signal, representing sound captured by a second microphone associated with a second location. The microphones comprise omni-directional microphones. The distance between the first and second microphones is limited by the size of a mobile device. A first channel signal of a stereo signal is generated by forming, based on the first and second audio signals, a first beam at the first location. A second channel signal of the stereo signal is generated by forming, based on the first and second audio signals, a second beam at the second location. First and second directions, associated respectively with the first and second beams, are fixed relative to a line between the first and second locations.
    Type: Grant
    Filed: May 2, 2016
    Date of Patent: November 14, 2017
    Assignee: Knowles Electronics, LLC
    Inventors: Jonathon Ray, John Woodruff, Shailesh Sakri, Tony Verma
  • Publication number: 20170318387
    Abstract: Systems and methods for stereo separation and directional suppression are provided. An example method includes receiving a first audio signal, representing sound captured by a first microphone associated with a first location, and a second audio signal, representing sound captured by a second microphone associated with a second location. The microphones comprise omni-directional microphones. The distance between the first and second microphones is limited by the size of a mobile device. A first channel signal of a stereo signal is generated by forming, based on the first and second audio signals, a first beam at the first location. A second channel signal of the stereo signal is generated by forming, based on the first and second audio signals, a second beam at the second location. First and second directions, associated respectively with the first and second beams, are fixed relative to a line between the first and second locations.
    Type: Application
    Filed: May 2, 2016
    Publication date: November 2, 2017
    Inventors: Jonathon Ray, John Woodruff, Shailesh Sakri, Tony Verma
  • Patent number: 9668048
    Abstract: Provided are systems and methods for contextual switching of microphones in audio devices. An example method includes detecting a change in conditions for capturing an acoustic signal by at least two microphones. A configuration is associated with the at least two microphones. The example method provides determining that the change in conditions has been stable for a pre-determined period of time. In response to the determination, the method changes the configuration associated with the at least two microphones. The conditions may include an absence or presence of far-end speech, reverberation, low/high signal-to-noise ratio, low/high signal-to-echo ratio, type of background noise, and so on. The changing of the configuration includes assigning a primary microphone and a secondary microphone based on a change in conditions. Based on the changed configuration, tuning parameters may be adjusted for noise suppression and acoustic echo cancellation.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: May 30, 2017
    Assignee: Knowles Electronics, LLC
    Inventors: Shailesh Sakri, Ajay Kumar Dhanapalan, Harsha Inna Kedage Rao
  • Publication number: 20160227336
    Abstract: Provided are systems and methods for contextual switching of microphones in audio devices. An example method includes detecting a change in conditions for capturing an acoustic signal by at least two microphones. A configuration is associated with the at least two microphones. The example method provides determining that the change in conditions has been stable for a pre-determined period of time. In response to the determination, the method changes the configuration associated with the at least two microphones. The conditions may include an absence or presence of far-end speech, reverberation, low/high signal-to-noise ratio, low/high signal-to-echo ratio, type of background noise, and so on. The changing of the configuration includes assigning a primary microphone and a secondary microphone based on a change in conditions. Based on the changed configuration, tuning parameters may be adjusted for noise suppression and acoustic echo cancellation.
    Type: Application
    Filed: January 29, 2016
    Publication date: August 4, 2016
    Inventors: Shailesh Sakri, Ajay Kumar Dhanapalan, Harsha Inna Kedage Rao
  • 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