Digital interactive television

Digital Interactive Television (DiTV) is a system through which moving images and sound are broadcast and received. In contrast to analogue (traditional TV) the information is compressed into computerised binary information which takes up far less bandwidth allowing more channels to be broadcast, and allowing interaction via the ‘red button’ system.

Digital TV is an important method for ensuring that homes without internet access are able to interact with health information from their own living rooms. The use of Digital TV to reach excluded groups is the major benefit of the service, although the evidence for numbers actually interacting shows limited take-up. The service is currently slow and inflexible when compared to the internet and so seems likely to remain niche unless significant alterations to the present system are made- which is a possibility.

Introduction  |  Examples |  Benefits  |  Risks 

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