Patents by Inventor Adrianus H. Hoogendijk

Adrianus H. Hoogendijk 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: 4642702
    Abstract: A method is described on encoding a recording signal comprising a composite color video signal and a digital audio signal, for recording said signal on and reading it from an optical video disc. The color video signal is frequency-modulated on a carrier in the customary manner, while the audio signal is added to said frequency-modulated signal as a pulse-width-modulated digital signal.
    Type: Grant
    Filed: July 13, 1984
    Date of Patent: February 10, 1987
    Assignee: U.S. Philips Corporation
    Inventors: Josephus A. H. M. Kahlman, Adrianus H. Hoogendijk
  • Patent number: 4236173
    Abstract: An apparatus for reading a disc-shaped record carrier on which per track circumference one picture of a color television signal is recorded. The signal being read is converted to a standard PAL color television signal. The apparatus comprising a command device which by applying command signals to control means can produce a jumpwise radial change in the scanning position on the record carrier, so as to enable the scanning sequence of the recorded pictures to be changed. In order to maintain a standard PAL color television signal in the case of a changed scanning sequence, the apparatus comprises a correction device for the chrominance signal. This correction device is controlled by the command device and comprises a mixing circuit for mixing the chrominance signal with a reference signal of twice the chrominance subcarrier frequency during time intervals prescribed by the command device, and phase correction means for introducing a phase shift of 0.degree., 90.degree., 180.degree., or 270.degree.
    Type: Grant
    Filed: January 31, 1979
    Date of Patent: November 25, 1980
    Assignee: U.S. Philips Corporation
    Inventors: Martinus P. M. Bierhoff, Adrianus H. Hoogendijk