Abstract: There is provided a one-way data transmission system wherein a transmitter station transmits in the form of data packs data from a plurality of channels, the said packs being time multiplexed.One channel amongst the plurality of channels is allotted to transmitting date information. In the receiver equipments, the dead memory stores not only the channel code, but also a subscription period information which permits to validate the channel code depending on the date information received from the date channel. Automatic dead-memory distributors are provided which receive data from a control channel transmitted by the system, like other channels. The system is compatible with television systems.

Abstract: A television video signal is used to record a television picture onto a photographic film.The television video signal is sampled, then digitized. Luminance data and chrominance data, if any, for each sample are stored in a memory. Then, such data is read out and selectively applied to an electro-optic device, such as one, for instance, made of electro-luminescent diodes. The diodes generate either monochrome or trichrome luminous points which are recorded on film by means of a photographic camera. Means are provided for eliminating frame interlacing and for using substantially a standard camera.The system may be used with any television standard.