Local DAB broadcasting

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Presentation of the software defined radio approach for DAB transmission based on CRC mmbTools and application.

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Local DAB broadcasting

  1. 1. EBU TECHNICAL Local DAB broadcasting WorldDMB General AssemblyWorldDMB General Assembly Belfast - 27Belfast - 27thth October 2010October 2010 Mathias Coinchon EBU TECHNICAL European Broadcasting Union
  2. 2. EBU TECHNICAL - your reference in media technology and innovation Digital radio, far too complex/costly for small radios or experimenters ?
  3. 3. EBU TECHNICAL - your reference in media technology and innovation It may not be the case anymore... (since the democratisation of software defined radio)
  4. 4. EBU TECHNICAL - your reference in media technology and innovation Software defined radio
  5. 5. EBU TECHNICAL - your reference in media technology and innovation Traditional approach of radio transmission/reception  Specific dedicated hardware  Limited flexibility  Few possibilities of evolution
  6. 6. EBU TECHNICAL - your reference in media technology and innovation Software Defined Radio (SDR) Principle  Generic hardware – « Like a soundcard » but for radio waves  Software (de-)modulation – can run on PC ⇒high flexibility, limited by CPU/Interface Antenna
  7. 7. EBU TECHNICAL - your reference in media technology and innovation Democratisation of Software Defined Radio  Gnuradio: open software radio blocks – The « Lego » of Radio  USRP: Universal Software Radio Peripheral – Open hardware solution sold by Ettus
  8. 8. EBU TECHNICAL - your reference in media technology and innovation What you can do with the USRP and a PC  FM RDS transmission and reception  DAB/DAB+ transmission (CRC-mmbTools)  DRM/DRM+ transmission/reception (Spark, Dream)  Local GSM (OpenBTS project)  GPS receiver  Aircraft beacon receiver  Passive Radar  DECT, RFID, Wifi, etc  Anything within the limits of your imagination and CPU
  9. 9. EBU TECHNICAL - your reference in media technology and innovation DAB Software Radio  Developed by Communication Research Center (CRC), Canada – Francois Lefebvre, Pascal Charest – First public demo at IBC2006 – Presented to WorldDMB TC, Eindhoven 09/2006 (TC-372)  CRC-DABMUX: DAB/DAB+/DMB Multiplexer  CRC-DABMOD: DAB Mode II OFDM modulator (no SFN)  Other tools for slideshow, CELT, DAB+, etc  Open sourced in 2009-2010 (GPL license) http://mmbtools.crc.ca
  10. 10. EBU TECHNICAL - your reference in media technology and innovation Application: Performance at Label Suisse festival  Live local broadcasting of 8 DAB channels  Audio from a video projection of 8 music bands playing  First licensed DAB transmission fully open source Warning: This is not an EBU project
  11. 11. EBU TECHNICAL - your reference in media technology and innovation Application: Performance at Label Suisse festival  DAB transmission by Maxxima  Video projection by MXLab More information on http://www.opendigitalradio.org
  12. 12. EBU TECHNICAL - your reference in media technology and innovation Integrating open source blocks on Linux PCM MPEG ETI IQUSB
  13. 13. EBU TECHNICAL - your reference in media technology and innovation Application: Multiplatform & Hybrid Radio demo  Generation of any DAB or FM RDS broadcast signals (and also DRM, DAB slideshow) FM+RadioDN S DRM Slideshow DAB+RadioDNS DAB Slideshow
  14. 14. EBU TECHNICAL - your reference in media technology and innovation Application: EBU Multiplatform hybrid demo at IBC
  15. 15. EBU TECHNICAL - your reference in media technology and innovation DAB/DAB+ (and FM, DRM, streaming) in a box
  16. 16. EBU TECHNICAL - your reference in media technology and innovation Application: The EBU demo at IBC 2010  Local DAB coverage at IBC  DAB/DAB+ live and DMB pre-recorded  Equipment for DAB transmission: – PC: ~800€ – Linux, gnuradio, CRC-mmbTools: 0€ – USRP + RF frontend: 1150$ (~820€) – Amplifier 35 Watts CW, 6W OFDM: ~ 150€ – VHF Mask Filter, 6 cavities: 1300 € – VHF 5dB 3 elements Antenna: 300€ – Small equipment: 100€ – TOTAL: ~ 3500 €
  17. 17. EBU TECHNICAL - your reference in media technology and innovation Under development (Warning: not an EBU project)  Higher power transmission for coverage of a city  Temporary digital licence (Maxxima radio project) 600W (CW) class AB amplifier development by Stan Roehrich Maxxima.org
  18. 18. EBU TECHNICAL - your reference in media technology and innovation Demo
  19. 19. EBU TECHNICAL - your reference in media technology and innovation Conclusion
  20. 20. EBU TECHNICAL - your reference in media technology and innovation Conclusion  Digital radio transmission gets democratised  This solution is EXPERIMENTAL – And we are not selling a solution nor providing any service  Good for experimentation, local broadcasting, etc  Not a threat for DAB industry but an opportunity – Open/democratised tools enable innovation (Internet example)  All this is possible thanks to major CRC investment in DAB software now offered as free open source project  Will you participate to the future enhancements ?
  21. 21. EBU TECHNICAL Mathias Coinchon coinchon@ebu.ch +41 22 717 27 16

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