System for controlling conditional access systems and method for controlling conditional access systems

摘要

In a system for controlling conditional access systems (143, 145, 147, 149) for television data in a digital television decoder having a signal processing block with a decoder descrambler and a conditional access block with at least one conditional access system, the conditional access block (141) is provided with conditional access system clients (142, 144, 146, 148), which handle communication with the conditional access systems (143, 145, 147, 149) via a client interface (152) uniform for all clients (142, 144, 146, 148). Furthermore, the conditional access block (141) is provided with a conditional access clients manager (151), which handles communication with conditional access systems (143, 145, 147, 149) via the clients (142, 144, 146, 148) via a client interface (152) and controls descrambling of signal in the decoder by selecting the conditional access system (143, 145, 147, 149) responsible for descrambling the currently received signal and controlling the decoder descrambler (132) depending on the selected conditional access system (143, 145, 147, 149).