Patents by Inventor J. E. Drummond

J. E. Drummond 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).

  • High definition TV system
    Patent number: 4916525
    Abstract: A high definition television system is disclosed. The transmitter 10 of the invention compresses image data and transmits the compressed data during the vertical flyback interval of a standard NTSC television signal. The receiver 30 of the invention decompresses the compressed image data and adds the expanded lines of data to normal image data in interlineal fashion. In a specific embodiment, an improvement operator 58 is utilized to expand the data and fill in missing pixels. The output of the improvement operator 58 is stored in a memory 56 which is then scanned in a non-interlaced mode for presentation.
    Type: Grant
    Filed: August 29, 1988
    Date of Patent: April 10, 1990
    Assignee: Hughes Aircraft Company
    Inventor: J. E. Drummond