Patents by Inventor David Schnuelle

David Schnuelle 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).

  • Vertical interval test signal for detecting video system low-level luminance linearity and differential gain and phase errors
    Patent number: 5353117
    Abstract: A test signal for enabling control of picture fidelity in a distribution system for distributing a video signal that has a vertical interval including a number of lines. The test signal comprises plural luminance levels for testing luminance linearity. The luminance levels have a non-linear level relationship with respect to one another. Each luminance level has a predetermined level. The test signal may additionally include a chrominance component for testing differential gain and phase. The chrominance component has a predetermined amplitude and a predetermined phase corresponding to flesh tone. In a method of enabling control of picture fidelity in a distribution system for distributing a video signal, the above test signal is provided at a source stage and is inserted into at least part of a selected line in the vertical interval of the video signal.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: October 4, 1994
    Assignee: LucasArts Entertainment Company
    Inventors: Tomlinson Holman, David Schnuelle