Method and system for synchronised receiver-side preparation of trigger information for interactive TV applications

摘要

The method involves transmitting a digital data i.e. digital TV data, flow from a transmitter-server (100) to set-top-boxes (200-206) over a transmission channel (810). Trigger information related to the digital data flow are transmitted from polling servers to the set-top-boxes over another transmission channel (820) separated from the transmission channel in a synchronized manner. Predetermined actions are executed by the set-top-boxes in response to reception of the trigger information. The trigger information are provided with address data and/or program data in the polling servers. An independent claim is also included for a data transmission system comprising a transmitter and a central control unit.