Patents Represented by Attorney Ken Rubenstein

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  • Method and filter for enhancing a noisy speech signal
    Patent number: 5148488
    Abstract: A filter for filtering a speech signal to reduce acoustic noise is disclosed. In accordance with the inventive filter, the parameters of an all-pole vocal tract model are first estimated from the noisy signal using a least mean square algorithm as if no noise were present, and then the speech signal is filtered using an approximate limiting Kalman filter constructed according to the estimated parameters.
    Type: Grant
    Filed: November 17, 1989
    Date of Patent: September 15, 1992
    Assignee: NYNEX Corporation
    Inventors: Walter Y. Chen, Richard A. Haddad