Thomson Licensing S.a.

Mario De Vito

Louis Gregoire

Laurent Gauche

V&eacute;ronique Pla

The descrambling device comprises hardware resources ( ) and first memory zones (CA , CA , . . . , CAn) to store at least two different access control codes for controlling the hardware resources. The device also contains an arbitration code for selecting one access control code to control the hardware resources in order to share access to the hardware resources from the access control codes. Access control codes can be downloaded in the first memory zones by means of a loader contained in the device.

Descrambling device for the use of several conditional access sub-systems

Process for scrambling and process for descrambling digital video data and devices implementing the processes

A method for loading a user interface in a television system comprising a decoder and a removable smart card cooperating with the decoder, the decoder comprising a main user interface, the method comprising the steps of loading and storing by the decoder of the totality of a user interface module stored-on the smart card, the user interface module comprising data structures making reference to information destined to a user, the information being stored on the smart card, establishing by the decoder a relation between the main user interface and the stored user interface module in order to enable access by a user to the user interface module, and subsequently exchanging between the decoder and the smart card parts of the information upon commands issued by the user through the user interface module.

Method and device for loading a user interface

The present invention concerns a method for cascading detachable conditional access modules as well as a circuit for inserting a predetermined sequence and a circuit for detecting the sequence. Each module receives a data stream formed of packets of fixed length separated by an interpacket space of fixed length. The interpacket spaces contain a constant predetermined sequence which does not interfere with the packets. The predetermined sequence may be used to regenerate a packet clock signal.

Method for cascading detachable conditional access modules, circuit for inserting a predetermined sequence and circuit for detecting the said sequence in order to implement the method

Growing community of inventors

Geveze, France

Mario De Vito