Abstract: A method of delivering an interactive application to a plurality of target platforms (2). The method comprises providing a set of application components; converting the set of application components into a plurality of streams of broadcast data, each stream of broadcast data conforming with a respective target platform (2); and delivering each stream of broadcast data to its respective target platform (2).

Abstract: Apparatus for interactively generating a display signal. The apparatus comprises: a receiver (2) for receiving a broadcast signal (15), the broadcast signal comprising a plurality of datastreams each including image data defining a background object (22–270), and control parameters (28–39); a foreground computer generated imagery (CGI) device (3) for generating a foreground computer generated object (CGO); a mixer (4) for combining the foreground CGO with background object image data to generate the display signal; and interaction means (3) for receiving the control parameters from the receiver, monitoring the position of the foreground CGO, and adapting the display signal with reference to the monitored position of the foreground CGO and the received control parameters.

Abstract: A method of supplying information from a central source (1) to a plurality of remote user interfaces (9) relating to an interactive application. The method comprises: i) transmitting application data associated with the interactive application to the user interfaces (9); and, ii) thereafter, transmitting a real time start signal to the user interfaces (9) to enable the interactive application to begin substantially simultaneously at each user interface.

Abstract: A method and apparatus for broadcasting a scheduled interactive application to a plurality of users via respective user interfaces. Initially, setup data is placed on a broadcast carousel prior to a scheduled start time of the interactive application whereby setup data is repeatedly broadcast to the user interfaces. A status flag is broadcast to the user interfaces to indicate that the setup data has been placed on the broadcast carousel. Real time data is broadcast to the user interfaces at the scheduled start time. Electronic programme guide (EPG) data indicating a scheduled start time for the scheduled interactive application is further broadcast to the user interfaces.