In the project GMF4iTV an end-to-end platform has been developed for providing interactive television services by using the Multimedia Home Platform (DVB-MHP) standard. The system enables the interaction with moving objects in normal TV programs. The metadata for the object locations and the additional content is coded in MPEG-7 format and is broadcasted in sync with the MPEG-2 video. MHP uses these metadata to highlight the objects on the Set-Top-Box.

The viewer has different choices to interact with the objects on the TV-screen. He may use a normal remote control to select the object by pressing the colour button, which matches this object. Alternatively, he can use a PDA as an advanced personal mobile multimedia terminal offering selection possibilities by touching a highlighted object. After selecting the object, the viewer can then retrieve additional information, which may consist of MPEG-4 A/V clips, MHP-applications, pictures, and HTML pages.