Patents by Inventor Horst H. Tomaschewski

Horst H. Tomaschewski 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 of and apparatus for determining start-point and end-point of isolated utterances in a speech signal
    Patent number: 4945566
    Abstract: In a method of and an arrangment for determining the start-point and end-point of a word signal in a speech signal consisting of isolated utterances, three adjacent windows are determined at each new digital value for the last arrived stored digital values, in which the central window contains the actual word signal. The length of this central window is varied for each digital value between a minimum and a maximum value, and a threshold value is determined from the two adjacent windows and is subtracted from the energy contained in the central window. Thus, the method and the apparatus always takes the overall speech signal into account instead of individual isolated portions so that a reliable end-point determination then is possible.
    Type: Grant
    Filed: November 18, 1988
    Date of Patent: July 31, 1990
    Assignee: U.S. Philips Corporation
    Inventors: Dieter Mergel, Hermann Ney, Horst H. Tomaschewski