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Delivery Platforms – What's available?


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  • Mobile TV trials: radio and TV programs, radio had highest listening time
  • Interference of PLT
  • Transcript

    • 1. Digital radio platforms in Europe Eurosonic conference - Bruxelles – 10th May 2007 Mathias Coinchon EBU Technical department
    • 2. Presentation plan
      • Overview of digital systems
      • Aspects to consider, categorisation, frequencies
      • Focus on European digital radio broadcasting systems
        • DAB family of standards: DAB/DAB+/(T-DMB)
        • Digital Radio Mondiale
      • Future and conclusion
      This presentation does not cover on-demand, delayed delivery platforms (also called non-linear radio)
    • 3. Analogue broadcasting AM 1906 FM ~1955 (published: 1936)
    • 4. Digital systems... and more to come .... ISDB-T
    • 5. Aspects to consider
      • Network costs
        • Coverage objectives: % country/population, audience, indoor reception
        • Number of programmes / audio quality
      • User
        • Free to air services
        • Simplicity of use/installation, portability, receiving costs, battery life
        • Zapping time, service following
      • Associated data
        • Pictures, text, interactivity, (video)
        • Other information: traffic information, announcements
    • 6. Nature of systems
      • Terrestrial: small to large scale coverage, indoor
        • Radio: DAB, DRM, IBOC/HD radio (USA)
        • TV: DVB-T, DVB-H, T-DMB, MediaFlo, ISDB-T
      • Satellite: large scale coverage, no indoor
        • Radio: Worldspace, XM/Sirius (USA), ESA
        • TV: DVB-S, DVB-TH (hybrid terrestrial/satellite)
      • Telecommunication systems: designed for one to one
        • Mobile phones: 3G UMTS
        • Internet using Wifi, Wimax,....
    • 7. Resources: frequencies
      • Long, medium and short waves (<30MHz): DRM
      • Band I (47-68MHz): (DRM+)
      • Band II (87.5-108MHz): FM, (DRM+)
      • Band III (174-230MHz): DAB, DVB-T
      • Band IV & V (470-862MHz): DVB-T/DVB-H
      • Band L (1452-1490MHz): DAB, Satellite radio
      Antenna size Transmitters density
        • Low frequencies: large scale terrestrial coverage
        • High frequencies: local terrestrial coverage
      All European countries now have band III spectrum available for DAB
    • 8. The DAB Family
      • Eureka-147/DAB Family
        • Initially: Audio.
        • Now: Audio, video & other data services.
      • Common DAB transmission system
        • “ Bouquet” of services (Multiplex) on a single DAB frequency
        • Coexistence of different types of services is possible
      1993 2005 2007 2005 DAB transmission system DAB Audio DAB-IP T-DMB DAB+
    • 9. DAB
      • Terrestrial Digital Audio Broadcasting transmission system
        • Robust for Mobile (up to 300km/h)
        • Single Frequency Network: no frequency changes, combined power
      • Audio services with MPEG Layer II
        • 192-256kbps for good quality stereo, 128kbps for moderate quality
      • Data services
        • PAD: Program associated data (text, pictures, web, guide)
        • Announcements, traffic information
      • >350 receiver models, starting from 50€
    • 10. DAB+
      • System for transporting MPEG-4 AAC audio over DAB
        • Good audio quality at low bitrates => more audio or other services
        • Inherits all DAB features designed for radio
        • DAB receivers are incompatible but DAB+ ones will receive DAB
        • First receivers in 2007, chipset already available
      • Good option for new comers
        • Australia has already chosen DAB+
      • Others: migration plans can be considered
        • New services with DAB+
    • 11. DAB/DAB+ Capacity
      • DAB stereo audio at 128kbps
        • up to 9 services per multiplex
      • DAB+ stereo audio at 64 kbps
        • up to 18 services per multiplex
    • 12. DAB+ Audio at 48kbps
      • DAB+ Audio at 48kbps
      • Audio demonstration
        • Normal DAB at 48kbps (stereo)
        • DAB+ at 48kbps
        • Original extract
      • Audio quality improvement
        • Higher bitrate necessary for Hi-Fi
        • Planned EBU listening tests (B/DABA group)
      24 audio services
    • 13. T-DMB: Terrestrial Digital Multimedia Broadcasting
      • Mobile television system over DAB
        • MPEG-4 video and audio (BSAC or AAC)
        • ~150 receivers models: Car GPS, mobile phone, portable devices
      • Can be used for radio with pictures but
        • Increased overhead => less programs ( ~normal DAB )
        • Video component is necessary for the receivers
        • Longer zapping time
      • T-DMB receivers include normal DAB reception
    • 14. DAB-IP
      • IP transport over DAB
      • Flexibility of IP for transporting multimedia services
      • No specification for service description, formats,...
        • Suitable for vertical markets like mobile operators who control their mobile receivers park
      • BT Movio in the UK: Multimedia services (video) + DAB radio programs
      • DAB-IP enabled phone receive normal DAB (and probably DAB+ in the near future)
    • 15. DAB multiplex composition example Legacy DAB receiver DAB+ receiver T-DMB receiver
    • 16. DRM: Digital Radio Mondiale
      • Digital system for long, medium and shortwave
        • Improved audio quality compared to AM (but lower than FM)
        • Easy tuning
        • Large scale coverage with few transmitters
        • Limited capacity, sensitivity to interferences
      • DAB(+)/DRM receivers (alliance)
      • Complementary to DAB standards
      • DRM+: project of modified DRM for frequency bands I (TV) and II (FM band)
    • 17. Internet radio receiver
      • Home device that enable Internet radio listening (streaming) without a PC
        • Wifi or cable (Ethernet) connection
      • Huge choice of stations
      • Not so trivial to install/configure
        • Broadband connection necessary
        • Some technical knowledge necessary for the setup and configuration
      • Limited range (home device)
      • Suitable for small audience programs
        • Big audiences leads to high distribution costs for the broadcaster
    • 18. Digital world
      • The digital world construction.....
      • (Picture: The Tower of Babel by Pieter Bruegel, 1563)
    • 19. Software defined radio
      • Software defined radio
        • Similar hardware for different standards
        • Software demodulation/decoding => updates/adaptations possible
      • Issue: costs of standard patents (IPR licences)
      FM/DAB/DAB+/Wifi Receiver module
    • 20. Conclusions
      • Consider the objectives for radio and network costs
        • Availability of frequencies
      • European radio broadcasting standards
        • DAB/DAB+: national/regional/local coverage, large audience, multimedia
        • DRM: international/national/(local) coverage, large audience
      • Don’t get confused with plethora of systems
        • Marketing overload
        • Interoperability with multi-standard receivers (DVB-H/DMB/DAB+)
        • Integration of broadcasting standards in mobile phone devices (like FM in today’s mobile phones)
    • 21. Thank you ! Questions ? For more informations: