Peter Weitzel BSc (Eng) CEng MIEE MSMPTE Manager, Broadcast Technology Developments BBC Technology
2.15 Interactive TV
‘Interactive TV’ can mean a variety of things to each broadcaster, and for the engineers covers a wide range of technologies. There are two main categories of service when interacting with the TV:
• Enhanced TV, where streams of information are ancillary to the programme and the selection is made in the TV or Set-Top Box (STB).
• Interactive TV, where additional information is provided and can be selected in the TV or STB but may engage on a oneto-one basis with that viewer. This implies a back channel from the TV or STB to a central server.
Both forms of interactivity use text as well as the moving ...