Patents by Inventor Dirk A. Van Hees

Dirk A. Van Hees 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).

  • Video signal processing circuit for processing an interlaced video signal
    Patent number: 4740842
    Abstract: A movement-adaptive processing circuit for an interlaced video signal has a selection circuit (5) which passes on to its output (21) one of the three video signals applied to its inputs (3, 9, 11) and which signals substantially correspond to three position-sequential lines of two consecutive fields when this signal has an amplitude which is closest to the mean amplitude of these three video signals. The processing circuit may be used many types of circuits such as, for example, in line or field number conversion circuits, noise suppression circuits, DPCM decoding circuits, vertical contour correction circuits and still-picture display circuits of video record players.
    Type: Grant
    Filed: February 12, 1986
    Date of Patent: April 26, 1988
    Assignee: U.S. Philips Corporation
    Inventors: Marcellinus J. J. C. Annegarn, Terence Doyle, Peter H. Frencken, Dirk A. Van Hees