Patents by Inventor Francois Ferret

Francois Ferret 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: 4325053
    Abstract: A method of decoding a C.M.I. encoded binary signal, the method comprising the steps of: detecting the 0 to 1 transitions in the C.M.I. encoded binary signal; in detecting the 1 to 0 transitions in the same signal; in eliminating from the detected 0 to 1 transitions those transitions which appear one binary bit period after the immediately preceding 1 to 0 transitions; and in using the remaining 0 to 1 transitions to synchronize pulses of a duration equal to one bit period thereby obtaining, after inversion, a signal in NRZ-L code corresponding to the binary data contained in the C.M.I. encoded signal.
    Type: Grant
    Filed: July 19, 1979
    Date of Patent: April 13, 1982
    Assignee: Compagnie Industrielle des Telecommunications
    Inventors: Pierre Le Brozec, Francois Ferret, Pierre Doussoux
  • Patent number: 4132862
    Abstract: A device for multiplexing n quasi-synchronous digital trains into one digital train at least n times faster, with a rate of Fs, comprises n channel elements for synchronizing together the quasi-synchronous trains by the addition of extra bits called "justification bits", and a multiplexing element for delivery, from the synchronized trains, the multiplex train (T) (rapid) formed by successive frames. According to the invention, the multiplexing element supplies to each channel element a signal SJ constituted by a pulse Fs/n at each of the places except for the last place, provided in the train synchronized at the frame frequency of the multiplex train and by a pulse covering this latter location and maintained up to the beginning of the following frame and each channel element comprises means for ensuring, on differentiated edges of the signal SJ the insertion of justification indications, of value 1 or 0 according to whether there is or is not a request for justification in the synchronized train.
    Type: Grant
    Filed: December 5, 1977
    Date of Patent: January 2, 1979
    Assignee: Compagnie Industrielle des Telecommunications Cit-Alcatel
    Inventors: Francois Ferret, Pierre Doussoux, Yvon Le Nen