Patents by Inventor Jimmy Yang

Jimmy Yang 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: 5510843
    Abstract: An apparatus and method are provided for reducing flicker and/or vertically scaling an interlaced video image. In a first embodiment, a sequence controller selectively addresses a video memory to retrieve pixel data from adjacent scan lines. The pixel data is multiplexed and converted into RGB data in a look up table and stored in upper and lower latches as upper and lower pixel data. The upper and lower pixel data is then weighted using a predetermined weighting scheme to produce hybrid pixel color data for an even or odd field. By reducing relative contrast between even and odd field lines, flicker is reduced. In a second embodiment, vertical resolution is reduced, for example, from 480 lines to 400 lines, by applying a series of weighting schemes or filters to weight data from six input lines into five output lines. To reduce flicker in the output lines, data from adjacent lines may weighted to reduce relative contrast.
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: April 23, 1996
    Assignee: Cirrus Logic, Inc.
    Inventors: David Keene, Jimmy Yang, Kevin Chang