Patents by Inventor Satish K. Sreenivas Rao

Satish K. Sreenivas 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).

  • Method and system for near-end detection
    Patent number: 7536006
    Abstract: A system (200) and method (400) for near-end detection of voice (107) in speakerphone mode is provided. The method can include determining (402) a convergence of an adaptive filter (220), determining (404) a dissimilarity between an autocorrelation (311) of an echo estimate (244) and an autocorrelation (312) of a microphone signal (243) if the adaptive filter has converged, computing (406) a weighting factor (279) based on the dissimilarity, applying the weighting factor to a voice activity level (281) to produce a weighted voice activity level (283), comparing (410) the weighted voice activity level to a constant threshold, and performing (412) a muting operation in accordance with the comparing for providing half-duplex communication.
    Type: Grant
    Filed: July 21, 2006
    Date of Patent: May 19, 2009
    Assignee: Motorola, Inc.
    Inventors: Anil N. Patel, Satish K. Sreenivas Rao, Krishna Kishore A., Charan M. N.
  • METHOD AND SYSTEM FOR NEAR-END DETECTION
    Publication number: 20080019539
    Abstract: A system (200) and method (400) for near-end detection of voice (107) in speakerphone mode is provided. The method can include determining (402) a convergence of an adaptive filter (220), determining (404) a dissimilarity between an autocorrelation (311) of an echo estimate (244) and an autocorrelation (312) of a microphone signal (243) if the adaptive filter has converged, computing (406) a weighting factor (279) based on the dissimilarity, applying the weighting factor to a voice activity level (281) to produce a weighted voice activity level (283), comparing (410) the weighted voice activity level to a constant threshold, and performing (412) a muting operation in accordance with the comparing for providing half-duplex communication.
    Type: Application
    Filed: July 21, 2006
    Publication date: January 24, 2008
    Applicant: MOTOROLA, INC.
    Inventors: ANIL N. PATEL, SATISH K. SREENIVAS RAO, KRISHNA KISHORE A., CHARAN M.N.