Patents by Inventor Johannes G. W. M. Janssen

Johannes G. W. M. Janssen 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).

  • Sample rate conversion
    Patent number: 5892695
    Abstract: A filter device for changing a sample rate of a discrete representation, e.g., to change a size of an image signal (I), includes a plurality of multipliers (Mi), summing circuitry (Ai) coupled to outputs of the multipliers (Mi), and a plurality of delay cells (Di) arranged for repeatedly supplying identical values to corresponding ones of the multipliers (Mi) during a number of times corresponding to an expansion ratio by which the discrete representation (I) is to be expanded, or for, in cooperation with the summing circuitry (Ai, Ai'), accumulating output values from the multipliers (Mi) during a number of times corresponding to a compression ratio by which the discrete representation (I) is to be compressed.
    Type: Grant
    Filed: October 28, 1997
    Date of Patent: April 6, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Age J. Van Dalfsen, Jeroen H. J. C. Stessen, Johannes G. W. M. Janssen