Introduction: In addition to digital video/audio signal digital TV broadcast network could also be used for the carriage of data originating.

From the number of different sources thus ushering in the era of digital multimedia broadcasting. A key feature of the technology which is expected to function as a key driver of the analogue to digital transition process is the possibility of using those networks for the delivery services including access to the internet.

Digital Television Interactivity: Before proceeding further it is necessary to distinguish between different types of interactivity. The interactivity services currently under development can be divided into two major categories-those relating to fully interactive television services (which may include programme related services such as voting or home shopping) It is the interactive services of the latter type, that we will be discussing in this paper. There are two principal pytes of interactivity namely, local interactivity and two way interactivity.

An interactive TV application that is based on local interactivity is one which does not require path from the services consumer to the service provider.

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