Thomson Licensing S.a.

Nds Technologies France

Cisco Video Technologies France

Eric Delaunay

David Leporini

Jean-Claude Sarfati

Thierry Furet

Nicolas Beaunoir

Andre Surcouf

Nicolas Gaude

Laurent Proust

Laurent Chauvier

Alain Cancel

Laurent Douat

Hassan Taleb

Frederic Dublanchet

Franck Bellanger

Jean Claude Sarfati

David Ludet

Abdellah El Omari

Olivier Picard

A method of operating a digital television decoder is disclosed. The decoder includes a memory, the memory storing onboard software, and the decoder is operable in a run mode to execute the onboard software. The method comprises: activating a power saving mode on the decoder; and upon activating the power saving mode: maintaining power to the memory; suspending execution of the onboard software; acquiring an execution context of the onboard software; updating the execution context of the onboard software to form an updated execution context; and saving the updated execution context in the memory.

Digital television decoder

A method for transmission and storing of scrambled content in which the scrambled content is transmitted together with encrypted control words, the control words being used for descrambling the scrambled content, transmitting to a receiver/decoder the scrambled content and encrypted control words, said control words being encrypted by an exploitation key (K), decrypting said encrypted control words in a removable security module with an exploitation key (K), said removable security module being received by the receiver/decoder, characterised in that it further includes transmitting usage rules message (URM) to the receiver/decoder (), which usage rules (URM) impose usage constraints on the playback of the content stored on a mass storage device encrypting the decrypted encrypted control words and usage rules messages by a local key (K) to produce encrypted control management messages (CMM) storing said scrambled content and encrypted control management message on the mass storage device of the receiver/decoder.

Transmitting and processing protected content

A receiver/decoder (for example for digital television) normally receives and/or decodes transmitted data in a normal transmitted signal. In order to test an application running on the receiver/decoder, a special test signal could be generated, or a normal signal could be modified before supply to the receiver/decoder. However, this is costly and complex. To overcome these problems, the receiver/decoder simulates the reception of such transmitted data to produce simulated data; and the application to be tested processes such simulated data in addition to, or instead of, such transmitted data. Simulation may involve generating the simulated data in the receiver/decoder, or controlling the generation of the simulated data by a workstation and receiving the simulated data from the workstation. Data generation may employ a model of the transmitted signal, the model having various parameters which can be varied. Data representative of the simulation may be stored in the receiver/decoder and/or transferred from the workstation to the receiver/decoder, for example in parts on a when-required basis.

Apparatus for and method of testing applications

Growing community of inventors

Maintenon, France

Eric Delaunay