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DAV Nguyên tắc và các ứng dụng P1

Tài liệu hướng dẫn : DAV Nguyên tắc và các ứng dụng | 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 1 Introduction WOLFGANG HOEG THOMAS LAUTERBACH EGON MEIER-ENGELEN and HENRIK SCHULZE 1.1 General The new digital radio system DAB Digital Audio Broadcasting is a very innovative and universal multimedia broadcast system which will replace the existing AM and FM audio broadcast services in many parts of the world in the future. It was developed in the 1990s by the Eureka 147 D AB project. DAB is very well suited for mobile reception and provides very high robustness against multipath reception. It allows use of single frequency networks SFNs for high frequency efficiency. Besides high-quality digital audio services mono two-channel or multichannel stereophonic DAB is able to transmit programme-associated data and a multiplex of other data services e.g. travel and traffic information still and moving pictures etc. . A dynamic multiplex management on the network side opens up possibilities for flexible programming. In several countries in Europe and overseas broadcast organisations network providers and receiver manufacturers are going to implement digital broadcasting services using the DAB system in pilot projects and public services. DAB works very differently from conventional broadcasting systems. Most of the system components such as perceptual audio coding channel coding and modulation multiplex management or data transmission protocols are new solutions and typically not so familiar to the expert in existing analogue or digital broadcast systems. The level of standardisation of the DAB system is rather advanced and the various recent international standards and related documents are introduced and referred to for easy access for the reader seeking technical details. Digital Audio Broadcasting Principles and Applications edited by W. Hoeg and T. Lauterbach 2001 John Wiley Sons