Abstract: A telecommunications system includes a personal item held by a user of the system, a first means of communication made available to the user and capable of communicating with the personal item and with a data transfer network, and a second means of communication capable of communicating with the data transfer network and belonging to an interlocutor of the user. The first means of communication may be triggered between a non-transparent operating mode and a transparent operating mode during which it is incapable of acting on data passing through it. The system makes it possible to guarantee the user that the confidential data he may send will not be altered or saved by the first means of communication in view of its illicit use.

Abstract: To improve the rendering of a printing, a halftone rendering method is applied. This method optimally comprises a step for the adaptive tiling of the image. This tiling is based on a subdivision of the image by self-similar structures. These subdivisions are locally limited by the local intensity of the image. These local limitations make the tiling adaptive. The result of this tiling is a cloud of sampling structures, each of these structures being associated with a pixel of the image and a label produced during the tiling. The intensity of the pixel, and the label, enable the reading, in a table of correction vectors, of a correction vector corresponding to a shift to be applied to the pixel before it is printed. The table of the correction vectors is pre-computed in using a relaxation algorithm.

Abstract: The invention relates to a video projection device, comprising at least one terminal with the video data for projection, a server and a projector, said server, being connected to the projector by a hard-wire connection and accessible from a communication network, characterised in that the terminal may be connected, by means of the network and a network access processor, to a website hosted by the server, to download a file with an .ocx extension, comprising a remote control programme for the projection with an interface (ActiveX), the running of which by the network access processor permits the projection, by a video programme suitable for the projector, of the video data displayed on the screen of the terminal.

Abstract: A telephone communication system comprising a radiocommunication module (10) and a data encryption/decryption module (28), characterized in that the radiocommunication module (10) comprises a modem interface module (20) which is connected to the radiocommunication module (10) and controls an external modem (33). The encryption/decryption module (28) comprises a microcircuit support reader, an encryption/decryption circuit (29) and a vocoder circuit (30) receiving voice data to be encrypted or decrypted from the communication module (10). The encryption/decryption (29) of data is carried out directly in the encryption/decryption circuit (29) of the encryption/decryption module.