Peter Weitzel BSc (Eng) CEng MIEE MSMPTE Manager, Broadcast Technology Developments BBC Technology

2.15 Interactive TV



2.15.1 Introduction

‘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 ...

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