Patents by Inventor Serge G. Lefebvre

Serge G. Lefebvre 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).

  • Synchronization system for a semi-digital signal
    Patent number: 4860100
    Abstract: A system which provides synchronization with frame synchronization words of a partially digital signal, such as that of the D2MAC television standard. It is provided that three modes of operation are established sequentially. In a first mode, the values necessary to control the gain and the d.c. level of the television signal are obtained by means of a peak detector (18). Similarly, in a second mode, the peak detector is enabled only during the digital signal periods of the D2MAC signal. Finally, in the third mode, the setting values are obtained by arrangements (13, 8) which depend on the clamp plateau measurement of each line and of line 624.
    Type: Grant
    Filed: February 8, 1988
    Date of Patent: August 22, 1989
    Assignee: U.S. Philips Corporation
    Inventors: Issa Rakhodai, Serge G. Lefebvre, Pascal Couderc