Digital Audio Broadcasting Principles and Applications of Digital Radio Second Edition Edited by WOLFGANG HOEG Berlin, Germany and THOMAS LAUTERBACH University of Applied Sciences, Nuernberg, Germany Digital Audio Broadcasting Digital Audio Broadcasting Principles and Applications of Digital Radio Second Edition Edited by WOLFGANG HOEG Berlin, Germany and THOMAS LAUTERBACH University of Applied Sciences, Nuernberg, Germany Copyright ß 2003 John Wiley & Sons Ltd, The Atrium, Southern Gate, Chichester, West Sussex PO19 8SQ, England Telephone (þ44) 1243 779777 Email (for orders and customer service enquiries): cs-books@wiley.co.uk Visit our Home Page on www.wileyeurope.com or www.wiley.com All Rights Reserved. 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Contents Foreword xi Preface xiii List of contributors xvii Abbreviations xxiii 1 Introduction 1 1.1 General 1 1.2 Radio in the Digital Age 2 1.3 Benefits of the Eureka 147 DAB System 2 (Quality of service; Value added services; Universal system layout; Flexible multiplex configuration; Transmission efficiency) 1.4 History of the Origins of DAB 5 (Development, Organisations and platforms such as Eureka 147; WorldDAB; Milestones of introduction) 1.5 International Standardisation 12 (System; Audio coding; Data services; Network and transmission; Receiver; Guidelines for implementation; ETSI; IEC; ITU-R; CENELEC; CEPT; EBU) 1.6 Relations to Other Digital Broadcasting Systems 14 (Satellite based systems Astra, Worldspace; Terrestrial Systems such as DRM, Digital television DVB-T, Digital radio in US and Japan; Web-casting) 2 System Concept 27 2.1 The Physical Channel 27 (Multipath propagation; Doppler shifted carriers) 2.2 The DAB Transmission System 30 (Multicarrier modulation; Frame structure of DAB; Channel coding; Interleaving and PSK mapping; Time interleaving and overall delay; DQPSK modulation and frequency interleaving; Performance considerations) 2.3 The DAB Multiplex 40 (Description of the multiplex; Main service channel; Transport mechanism; FIC; Transmission frames; Logical structure; Multiplex reconfiguration) 2.4 Conditional Access 48 (Scrambling/descrambling; Checking/management of entitlements) 2.5 Service Information 50 (Basic information; Service-related information; Programme-related information; Announcements; Numerous examples; Tuning aids) 3 Audio Services and Applications 75 3.1 General 75 (MPEG Audio coding vs. 16 bit PCM) 3.2 Audio Coding 76 (Basic principles; Masking; Psycho-acoustic model; Filterbank; Bit allocation; Quantisation; Layer II audio bitstream; Audio decoding) 3.3 Characteristics and Features of MPEG-1 Layer II for DAB 84 (Audio modes; Sampling rate; Audio frame structure; Audio bit rates; Layer II vs. SBR coding technologies) 3.4 Programme-associated Data 87 (Dynamic Range Control DRC; Music/Speech Control; Receiving end) 3.5 Advanced Audio Applications Using MPEG-2 Features 91 (Multichannel audio coding; Half–sampling–rate coding; Multilingual services; Audio broadcasting for Hearing impaired) 3.6 Quality of Service 102 (Audio quality; Subjective assessment; Objective assessment – PEAQ) 3.7 Error Protection and Concealment 111 (Error protection; Concealment measures; Assessment of error performance) 3.8 A Typical DAB Ensemble 120 vi Contents 3.9 Audio Levels 121 (Audio signal level alignment; Programme loudness) 4 Data Services and Applications 127 4.1 General 127 (Introductory information) 4.2 Data Service Signalling 127 (General considerations) 4.3 Multimedia Applications with MOT 128 (Multimedia Object Transfer Protocol MOT; MOT object transport) 4.4 Standardised MOT User Application 133 (MOT slide show; Broadcast web site; Interactive services) 4.5 ‘‘Mobil-Info’’ as an Example of a Proprietary MOT User Application 137 (Presentation of video clips, news and graphic animation in a tram) 4.6 Textual PAD Services 139 (Dynamic label; Other textual PAD services) 4.7 Traffic Information Services and Navigation Aids 140 (Traffic massage channel TMC; TPEG; Differential GPS) 4.8 Moving Picture Services 143 (Digtal multimedia broadcast DMB; Motion PAD) 4.9 Other Data Transmission Mechanism 145 (Transparent data channel; IP tunnelling) 5 Provision of Services 151 5.1 The DAB Service Landscape 151 (Structure of DAB service organisation; Main services; Data services) 5.2 Use of Existing Infrastructures 157 (Broadcasting operation systems; Editorial systems) 5.3 Need for New Infrastructure 159 (Data management; Multimedia editorial tools; Data inserter) 5.4 Relationship between DAB Data Services and RDS 166 (DAB SId vs. RDS PI code; PTy codes; DAB Announcements vs. RDS TA; DAB Dynamic label vs. Radiotext; Crossrefering DAB services from RDS) Contents vii . Applied Sciences, Nuernberg, Germany Digital Audio Broadcasting Digital Audio Broadcasting Principles and Applications of Digital Radio Second Edition Edited. II audio bitstream; Audio decoding) 3.3 Characteristics and Features of MPEG-1 Layer II for DAB 84 (Audio modes; Sampling rate; Audio frame structure; Audio