Patents by Inventor Khuong B. Lieu

Khuong B. Lieu 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: 5073939
    Abstract: There is disclosed a dynamic time warping (DTW) apparatus for use in a speech recognition system which also performs wordspotting or speaker verification based on speech recognition techniques. The DTW apparatus has the capability of processing given different groups of coefficients and doing such processing to arrive at Euclidean and dynamic distances independent of the number of coefficients in the group. Essentially the DTW can process 8, 16 or 24 coefficients and provide distance measurements based on such coefficients which will enable the same stored template to be utilized in comparing speech utterances as defined by the coefficients with stored template data. The configuration of the DTW is such that rapid processing can occur whereby the unit can process a large number of frames in a relatively short period, as the number of frames processed is a function of the number of coefficients in the processed group and can process different numbered coefficients in a rapid and reliable manner.
    Type: Grant
    Filed: June 8, 1989
    Date of Patent: December 17, 1991
    Assignee: ITT Corporation
    Inventors: George Vensko, Khuong B. Lieu, Steven A. Meloche, John C. Potter