Patents by Inventor Pieter J. Fondse

Pieter J. Fondse 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: 4424532
    Abstract: A coding and decoding system for video and audio signals includes means at the transmitter for deriving clock and internal timing signals from the video signal. The internal timing signals are utilized at the transmitter to provide digital audio data representative of the program audio signal. The digital audio data is derived by sampling the program audio signal during horizontal lines of the video signal. The synchronizing information in the horizontal and vertical blanking intervals of the video signal is suppressed and the digital audio data and data representative of a decoder clock signal are inserted in the horizontal blanking intervals. Vertical reference signal data is inserted into the vertical blanking intervals of the video signal as it is transmitted. At the decoder there are means for reconstituting the audio signal from the digital audio data.
    Type: Grant
    Filed: May 9, 1983
    Date of Patent: January 3, 1984
    Assignee: Oak Industries Inc.
    Inventors: Pieter den Toonder, Pieter J. Fondse, Johannes Seltenrijch, Cornelis A. de Jong, Tom de Koningh
  • Patent number: 4353088
    Abstract: A coding and decoding system for video signals includes means at the transmitter for applying sine wave amplitude modulation of approximate line frequency to the aural carrier to prevent the chrominance subcarrier from providing receiver synchronization.
    Type: Grant
    Filed: May 14, 1980
    Date of Patent: October 5, 1982
    Assignee: Oak Industries, Inc.
    Inventors: Pieter den Toonder, Pieter J. Fondse
  • Patent number: 4340906
    Abstract: A method and means for coding and decoding video signals by repetitive video signal polarity reversal includes the steps of comparing the brightness level of a predetermined time period of the video signal with the brightness level of the video signal over the previous predetermined time period. The polarity of the video signal is inverted or reversed if the difference in brightness level between successive predetermined time periods exceeds a given value.
    Type: Grant
    Filed: May 14, 1980
    Date of Patent: July 20, 1982
    Assignee: Oak Industries Inc.
    Inventors: Pieter den Toonder, Johannes C. Seltenrijch, Graham S. Stubbs, Pieter J. Fondse, Howard F. Jirka