Patents by Inventor Robert J. Sluijter

Robert J. Sluijter 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).

  • Speech analysis system
    Patent number: 4637046
    Abstract: A speech analysis system in which segments of digitized speech are transformed into amplitude spectrums. For the voiced/unvoiced decision use is made of the peak value or spectral intensity in each amplitude spectrum. Basically a voiced decision is made when the spectral intensity increases monotonically over several segments by more than a given factor. An unvoiced decision is made if the spectral intensity drops below a given fraction of the maximum spectral intensity in the current voiced period. Refinements in the decisions are made by the use of fixed and adaptive thresholds.
    Type: Grant
    Filed: April 21, 1983
    Date of Patent: January 13, 1987
    Assignee: U.S. Philips Corporation
    Inventors: Robert J. Sluijter, Hendrik J. Kotmans
  • Speech analysis system
    Patent number: 4625327
    Abstract: Speech analysis system in which segments of speech are analyzed. For the voiced/unvoiced decision use is made of the average magnitude or waveform intensity of successive speech segments. Basically a voiced decision is made when the waveform intensity increases monotonically over several segments by more than a given factor. An unvoiced decision is made if the waveform intensity drops below a given fraction of the maximum waveform intensity in the current voiced period. Refinements in the decisions are made by the use of fixed and adaptive thresholds.
    Type: Grant
    Filed: April 21, 1983
    Date of Patent: November 25, 1986
    Assignee: U.S. Philips Corporation
    Inventors: Robert J. Sluijter, Hendrik J. Kotmans