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DAV Nguyên tắc và các ứng dụng P5

Tham khảo tài liệu 'dav nguyên tắc và các ứng dụng p5', kỹ thuật - công nghệ, kĩ thuật viễn thông phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Digital Audio Broadcasting Principles and Applications. Edited by Wolfgang Hoeg Thomas Lauterbach Copyright 2001 John Wiley Sons Ltd ISBNs 0-471-85894-3 Hardback 0-470-84170-2 Electronic 5 Provision of Services THOMAS SCHIERBAUM HERMAN VAN VELTHOVEN and WOLFGANG HOEG 5.1 The DAB Service Landscape The introduction of DAB took place during a period of great change in the radio world in general. Following the digitalisation of studios and consumer products now the means of transmission to living rooms and cars are going to be digital. Furthermore in addition to speech and music till now the only forms of presentation to audiences new kinds of multimedia applications will be introduced with the Internet digital broadcasting and new generations of mobile communication systems. The migration from the existing to necessary new infrastructures for the provision of multimedia services is a major challenge for content and service providers. Depending on the intended amounts of investments the appearance of service providers in DAB will be very variable. Most of the radio stations are starting with a simulcast of existing analogue audio services. Some stations are also providing data services for a better general service for the audience. However few providers are launching new audio services. In all these cases the accessibility of listeners plays a decisive role. As a result of the normally slow appearance of new technologies broadcasters have to exploit synergetic aspects of other media during the generation of a service. One time generating - several times distributing. The intention of this chapter is to describe the service generation the adaptation of the DAB system to interfaces of other media and the gradual integration of the necessary infrastructures in broadcasting houses. Most of the examples described are taken from the experiences of German broadcasters. Digital Audio Broadcasting Principles and Applications edited by W. Hoeg and T. Lauterbach 2001 John Wiley .