Patents by Inventor Jean Chatel

Jean Chatel 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).

  • Method of coding a video image stream with a view for subsequent recoding using the same type of code
    Patent number: 7733954
    Abstract: The invention lies within the area of image compression coding, in particular of MPEG type, which uses recoding help data. The invention affords a solution for reusing the help data selectively. To this end, the invention adjoins an electronic signature representative of the constraints of the coder. Thus, it becomes possible to determine whether the help data are reusable or not for a subsequent coding using other constraints.
    Type: Grant
    Filed: May 9, 2001
    Date of Patent: June 8, 2010
    Assignee: Thomson Licensing
    Inventors: Patrice Alexandre, Jean Chatel
  • Method for coding a video image flux
    Publication number: 20040101041
    Abstract: The invention lies within the area of image compression coding, in particular of MPEG type, which uses recoding help data. The invention affords a solution for reusing the help data selectively. To this end, the invention adjoins an electronic signature representative of the constraints of the coder. Thus, it becomes possible to determine whether the help data are reusable or not for a subsequent coding using other constraints.
    Type: Application
    Filed: November 21, 2002
    Publication date: May 27, 2004
    Inventors: Patrice Alexandre, Jean Chatel
  • Digital double demodulator
    Patent number: 4804924
    Abstract: A demodulator including a Hilbert transformer (20), a carrier regenerating circuit (30), a first delay line (35), a second delay line (36), a first switching device (38), a second switching device (39), a first multiplier (40), a second multiplier (42), a second adder (44), a third switching device (46), a third multiplier (48), a fourth switching device (50), a fourth multiplier (52), a second adder (54) and a divider circuit (60). This demodulator is able to demodulate either a frequency modulated signal, or a signal with double amplitude modulation in quadrature and with suppressed carrier.
    Type: Grant
    Filed: October 27, 1987
    Date of Patent: February 14, 1989
    Assignees: L'Etat Francais Represente Par le Ministre Des Ptt (CNET), Etablissement Public Telediffusion de France
    Inventors: Francoise Chassaing, Jean Chatel