Patents by Inventor Helene Cerf-Danon

Helene Cerf-Danon 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).

  • Tone detection process and device for implementing said process
    Patent number: 4782523
    Abstract: The process is made to detect a received tone including at least one single predetermined frequency, within a signal encoded using block coding and Linear Prediction Coding techniques providing auto-correlation coefficients R(i) and direct form coefficients a(i). The process is based upon Fourier Transform computations over the successive blocks of a(i)'s, with table look up tone identification, further confirmed upon R(i)'s stationarity detecting.
    Type: Grant
    Filed: April 27, 1987
    Date of Patent: November 1, 1988
    Assignee: International Business Machines Corp.
    Inventors: Claude Galand, Guy Roulier, Robert Vermot-Gauchy, Helene Cerf-Danon