Patents by Inventor Roger D. Turkington

Roger D. Turkington 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).

  • Recursive image encoding/decoding using interpolation within variably sub-divided picture areas
    Patent number: 4791486
    Abstract: Actual picture points of a picture area are compared with interpolated values derived from selected points. If the differences are small, data for only the selected points are transmitted, otherwise the area is subdivided and each sub-area processed in the same way, so that the number of points selected for transmission is greatest in detailed areas of the image.
    Type: Grant
    Filed: October 1, 1986
    Date of Patent: December 13, 1988
    Assignee: British Telecommunications Public Limited Company
    Inventors: Hugh Spriggs, Charles Nightingale, Roger D. Turkington