Patents by Inventor Marinus Cornelis Willem van Buul

Marinus Cornelis Willem van Buul 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: 4099122
    Abstract: Indicated as hybrid D-PCM a new transmission system is given which is based on differential pulse code modulation (DPCM) with signal compression at the transmitter end and signal expansion at the receiver end.In the transmitter defined auxiliary information is fed to the DPCM code groups to obtain composite code groups, while in the receiver a local auxiliary signal derived from a reconstruction device is subtracted in a separating device from the received composite signal. With a particularly simple construction hybrid D-PCM is distinguished as compared with DPCM by effective perturbation reduction, in addition to which a pulse can be saved in the transmitted code groups.
    Type: Grant
    Filed: May 27, 1976
    Date of Patent: July 4, 1978
    Assignee: U.S. Philips Corporation
    Inventor: Marinus Cornelis Willem van Buul
  • Patent number: 4090218
    Abstract: When the information of a continuous-motion video record is displayed in the stop-motion mode by repeated display of two fields which form an interlaced picture, motion in the scene gives rise to a frame-frequency flicker phenomenon in the stop-motion picture. By forming suitable video signal combinations in discrete groups which each comprise two associated fields and by recording these combinations in the video record, the flicker phenomenon in a stop-motion picture is eliminated without continuous display being perceptibly affected.
    Type: Grant
    Filed: March 15, 1976
    Date of Patent: May 16, 1978
    Assignee: U.S. Philips Corporation
    Inventors: Marinus Cornelis Willem van Buul, Jan August Marcel Hofman, Leendert Johan VAN DE Polder, Sing Liong Tan