Patents by Inventor Stephen H. Landrum

Stephen H. Landrum 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).

  • Resolution enhancement for video display using multi-line interpolation
    Patent number: 6191772
    Abstract: The invention provides a method and apparatus for enhancing apparent image resolution by way of multi-line interpolation.
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: February 20, 2001
    Assignee: CagEnt Technologies, Inc.
    Inventors: Robert J. Mical, David L. Needle, Teju J. Khubchandani, Stephen H. Landrum
  • Display list management mechanism for real-time control of by-the-line modifiable video display system
    Patent number: 5502462
    Abstract: The invention provides a method and apparatus for managing color modification of a raster based image on a real time, line-by-line basis and for managing real-time of new imagery into buffers whose data is displayable.
    Type: Grant
    Filed: November 1, 1993
    Date of Patent: March 26, 1996
    Assignee: The 3DO Company
    Inventors: Robert J. Mical, David L. Needle, Stephen H. Landrum, Teju Khubchandani
  • Resolution enhancement for video display using multi-line interpolation
    Patent number: 5481275
    Abstract: The invention provides a method and apparatus for enhancing apparent image resolution by way of multi-line interpolation. A method for enhancing the resolution of low-resolution image-data includes the steps of: providing a memory having independently addressable storage banks; storing the low-resolution image-data in the memory such that low-resolution image-data defining a first low-resolution row resides in a first of said storage banks and such that low-resolution image-data defining a second low-resolution row, adjacent to the first low-resolution row, resides in a second of said storage banks; extracting first through Nth low-resolution pixel signals from the memory, said signals representing values of low-resolution pixels in the adjacent first and second low-resolution rows of the low-resolution image-data; and producing a high-resolution pixel signal from said first through Nth low-resolution pixel signals in accordance with a distance-weighted algorithm.
    Type: Grant
    Filed: November 2, 1992
    Date of Patent: January 2, 1996
    Assignee: The 3DO Company
    Inventors: Robert J. Mical, David L. Needle, Teju J. Khubchandani, Stephen H. Landrum