Patents by Inventor Francoise Coutrot

Francoise Coutrot 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: 5615265
    Abstract: Process for the transmission and reception of conditional access programs controlled by the same operator.According to the invention, specific check words (MCSi) are formed for various programs of the same operator from a root check word individual to said operator. The check words of the access titles include a part which is common to all the programs controlled by the same operator and a part which is specific to each program.Uses in television, radio, data transmission, messaging, etc.
    Type: Grant
    Filed: December 20, 1994
    Date of Patent: March 25, 1997
    Assignees: France Telecom, Telediffusion de France
    Inventor: Francoise Coutrot
  • Patent number: 5349641
    Abstract: A process for the transmission and reception of scrambled conditional access programs, which are synchronously transmitted with entitlement control messages (ECM), with a reduced program switching time. The entitlement control messages (ECM) have check words, which are changed after a period of time called a phase, for descrambling the conditional access programs. The process includes transmitting main check messages (ECMp) for a main access program at a first frequency (Fp) and transmitting secondary check messages (ECMs) for secondary programs at a lower, second frequency (Fs). The secondary check messages (ECMs) are transmitted between two successive transmission of the main check messages (ECMp) such that all of the secondary check messages (ECMs) for each of the secondary programs are transmitted in a single phase. Therefore, a check word for any program is quickly acquired and program switching time is reduced.
    Type: Grant
    Filed: August 12, 1993
    Date of Patent: September 20, 1994
    Assignees: France Telecom Establissement Autonome de Droit Public, Telediffusion de France
    Inventors: Francoise Coutrot, Jean-Luc Giachetti
  • Patent number: 5301233
    Abstract: A process for the transmission and reception of personalized programs. The program is constituted by personalized program elements containing an identification of the recipient or addressee, the access to each program element being reserved for a single recipient and is conditioned for the possession of an access title covering the access criteria to the service and the possession of an individual identification on the part of each recipient. The access title control message enables users of the service to calculate, on the basis of the single cryptogram of a root control word and the identification of the recipient, all the personalized control words which will enable each recipient and him alone to descramble the elements relating to him.
    Type: Grant
    Filed: August 14, 1992
    Date of Patent: April 5, 1994
    Assignees: France Telecom Etablissement Autonome de Droit Public, Telediffusion
    Inventors: Francoise Coutrot, Pierre Fevrier
  • Patent number: 4947428
    Abstract: According to the invention, the control messages are constituted by a general addressing message (GCM), followed by shared addressing messages (SACM). The message (GCM) contains all the information common to all the user groups and a confirmation data item of the group of users and the messages (SACM) a shared address. Thus, the group is defined in a manner inherent in the control messages and can undergo reconfiguration at any time.Application to more particularly satellite broadcasting of television programmes.
    Type: Grant
    Filed: May 12, 1989
    Date of Patent: August 7, 1990
    Assignees: Etat Francais, represente par le Ministere des Postes, des Telecommunications et de l'Espace (C.N.E.T.), Telediffusion de France S.A.
    Inventors: Louis Guillou, Joseph Blineau, Francoise Coutrot, Vincent Lenoir
  • Patent number: 4763283
    Abstract: A process and apparatus for connecting the color coding of one equipment to another equipment. The position of the color of character Cc of the first equipment in the interval Ci-Ci+1 of two successive colors of the second equipment and the position of the background color Cf in the interval Cj-Cj+1 are determined. As a function of these positions, the character color is taken either as Ci, or as Ci+1. The background color is taken either as Cj or Cj+1.
    Type: Grant
    Filed: December 10, 1985
    Date of Patent: August 9, 1988
    Assignee: Centre National d'Etudes des Telecommunications and l'Establissement Public Telediffusion de France
    Inventor: Francoise Coutrot