Digital Video Broadcasting: Technology, Standards and Regulations
An overview of the technical, political, and market issues relating to digital video broadcast and digital television.
TABLE OF CONTENTS Digital Video Broadcasting: Technology, Standards and Regulations
Chapter 2: Theoretical framework
2.1 Introduction
This chapter provides a theoretical framework for DTV. Part of this framework consists of a model that is used to describe the different services that can be provided via DTV systems. The advantage of these systems is their ability to provide large-scale interactive services, instead of providing only traditional distribution services. Depending on the content s economic value, some of these services may be provided via a CA system.
The second part of the framework is formed by a policy model. As discussed in Section 2.3, this model is a useful tool for making a functional distinction on which several types of policies can be based. Finally, the services model and the policy model are combined to provide an overview of the theoretical framework, which also includes the services various information streams.
2.2 Services
This section first discusses interactive services and CA services. Next, a generic services model concerning a categorization of different types of services is presented. Finally, examples are used to illustrate the services model.
2.2.1 Interactive services
The traditional principle of television is that the broadcaster s content is distributed via a broadcast network to the end user. With respect to these kinds of services, television can be considered a passive medium. As concluded in Chapter 1, DTV enables more than the distribution of content only. It allows a large-scale provision of interactive multimedia services via the television medium. This implies that in communication, the end user is able to control and influence the subjects of...
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