Patents by Inventor Guy Bourel

Guy Bourel 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).

  • Television scrambling and descrambling method, and transmitter and receiver using said method
    Patent number: 5530756
    Abstract: In a television transmission system comprising an analog video channel scrambled with a control word which is changed occasionally and a NICAM sound channel scrambled with a control word which is also changed occasionally, and different scrambling and modulation circuits having independent clocks for the sound and video signals, a single control word generator is used for the sound and video signals and when this control word is changed for the video signal (17), a bit or a specific group of bits is incorporated in the subsequent sound data packet (18) indicating that a new control word is available, but the new control word will only be used for a subsequent data packet (19).
    Type: Grant
    Filed: September 14, 1994
    Date of Patent: June 25, 1996
    Assignee: U.S. Philips Corporation
    Inventors: Guy Bourel, Loic Potier