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Video over IP goes wireless: A DVB-H Tutorial

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A technical description on how to show video over wireless devices. A short description of the challenges such as power consumption, Doppler effect and the many encapsulation protocols

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Video over IP goes wireless: A DVB-H Tutorial

  1. 1. A DVB-H Tutorial Video over IP goes Wireless Marie Josée Drouin, VSF Meeting, June 06 © D. Tech 06
  2. 2. Agenda 1. Video over Mobiles 2. DVB-H Technical Review 3. System Technical Review 4. Video Services on Mobile 2010/02/24 - 3 © D. Tech 06
  3. 3. Introduction  Missing Service on Mobile Phones: VIDEO  Mobile users are ready to pay for it 2010/02/24 - 4 Source: IPDC Forum/HPI Research (2003) & DigiTag DVB Handbook © D. Tech 06
  4. 4. Video Over Mobiles Marie Josée Drouin, VSF Meeting, June 06 © D. Tech 06
  5. 5. Mobile: What’s different?  Traditional DTV Display  Uses wireline or large antennas  Has unlimited 110V/220V power  Is fixed  Methods for Video on Mobiles  Internet services  Java-based applications  2.5/3G cell technology  Parallel broadcast networks 2010/02/24 - 6 © D. Tech 06
  6. 6. Video over Mobile Standards Standards Origin Technology Dates T-DMB DAB (ETSI) 1,7 MHz T: ? Korea & Int. ~1 Mbps D: Dec 05 DVB-H DVB (ETSI) 5,6,8 MHz T: Apr 04 International ~11 Mbps D: Mar 06 Single-segment DiBEG (ARIB) 1/13th of 6 MHz T: Oct 04 ISDB-T Japan ~1 Mbps D: Mar 06 MediaFLO Qualcomm (TIA) 6 MHz T: Summer 06 US ~11 Mbps D: Q4 06 2010/02/24 - 7 Legend: T: Public Trial, D: Commercial Deployment © D. Tech 06
  7. 7. What is DVB-H?  Built by DVB  Standardized by ETSI  Unidirectional  Based on DVB-T, used for terrestrial transport of Digital TV  Using IP packets at the Network Layer  Can be muxed with DVB-T CBR services 2010/02/24 - 8 © D. Tech 06
  8. 8. DVB-H Adoption Worldwide 2010/02/24 - 9 Source: DVB-H website © D. Tech 06
  9. 9. DVB-H Technical Review Marie Josée Drouin, VSF Meeting, June 06 © D. Tech 06
  10. 10. DVB-T OSI Layer 1 3 2 DVB-T 1 2010/02/24 - 11 Source: ETSI TR 102 377 v1.2.1 (2005-11) © D. Tech 06
  11. 11. DVB-T Modifications (L1)  DVB-H signaling in TPS-Bits: Mandatory  Time Slicing, MPE-FEC, Interleaver depth, Cell ID, and 4K mode  4K FFT size mode: Optional  In-depth symbol interleaver: Optional  8K interleaver for 2k and 4k modes 2010/02/24 - 12 © D. Tech 06
  12. 12. DVB-H Protocol Stack & OSI L2 3 DVB-H 2 DVB-T 1 2010/02/24 - 13 Source: ETSI TR 102 377 v1.2.1 (2005-11) © D. Tech 06
  13. 13. DVB-H Innovations (L2)  Time-slicing: Mandatory  Power reduction  MPE-FEC: Optional  C/N  Doppler  Impulse interference 2010/02/24 - 14 © D. Tech 06
  14. 14. DVB-H System PSI/SI NIT Video INT Video TS DVB-T Receiver MPEG4 MPEG4 MPEG4 Encoder IP Encoder Encoder RF IRD RF RF IP Backbone DVB-H Receiver 2010/02/24 - 15 * Inspired by ETSI TR 102 377 v1.2.1 (2005-11) © D. Tech 06
  15. 15. Solving the Layer 1&2 Issues  Mobility:  Doppler  4K FFT size  Power consumption:  Time Slicing 2010/02/24 - 16 © D. Tech 06
  16. 16. Doppler Effect (L1) 2010/02/24 - 17 Source: ETSI TR 102 377 v1.2.1 (2005-11) © D. Tech 06
  17. 17. FFT Size Impacts (L1) OFDM parameters, 16QAM, GI 1/4, 6MHz Modes, FFT size FFT symbol size characteristics 2K 4K 8K Number of Carriers (K) 1705 3409 6817 Duration of symbol - Tu (µsec) 299 597 1195 Carrier Spacing - 1/Tu (Hz) 3348 1674 837 Duration of guard interval - Δ (µsec) 75 149 299  FFT size Impacts on RF performance  Doppler Frequency – Mobility  Echo delay – Maximum SFN radius area  Channel estimation – Demodulator complexity & power  Phase noise resistance – Robustness 2010/02/24 - 18 Source: ETSI TR 102 377 v1.2.1 (2005-11) & ETSI EN 300 744 V.1.5.1 (2004-11)Tech 06 © D.
  18. 18. Power Consumption 2010/02/24 - 19 Source: ETSI TR 102 377 v1.2.1 (2005-11) © D. Tech 06
  19. 19. Time-Slicing (L2) MPE Sections 2010/02/24 - 20 Source: ETSI TR 102 377 v1.2.1 (2005-11) © D. Tech 06
  20. 20. Solving the Layer 2&3 Issues  Multi Protocol Encapsulation  with FEC (MPE-FEC)  IP Datagrams 2010/02/24 - 21 © D. Tech 06
  21. 21. Multi Protocol Encapsulation (L2) 2010/02/24 - 22 Source: ETSI TR 102 377 v1.2.1 (2005-11) © D. Tech 06
  22. 22. IP (L3) -> MPE-FEC (L2) 2010/02/24 - 23 Source: ETSI TR 102 377 v1.2.1 (2005-11) © D. Tech 06
  23. 23. System Technical Review Marie Josée Drouin, VSF Meeting, June 06 © D. Tech 06
  24. 24. Solving the Layer 3&4 Issues  IP DataCasting (IPDC)  Convergence of Broadcast and Mobile Services (DVB-CBMS) 2010/02/24 - 25 © D. Tech 06
  25. 25. IPDC OSI Layer 3 IPDC 3 DVB-H 2 DVB-T 1 2010/02/24 - 26 Source: ETSI TR 102 377 v1.2.1 (2005-11) © D. Tech 06
  26. 26. IPDC Protocol Stack (L3&4) 2010/02/24 - 27 Source: ETSI TS 102 472 V1.1.1 (2006-06) © D. Tech 06
  27. 27. IPDC Protocol Stack (L3&4) 2010/02/24 - 28 Source: ETSI TS 102 469 V1.1.1 (2006-06) © D. Tech 06
  28. 28. Putting it together: DVB-CBMS 2010/02/24 - 29 Source: ETSI TR 102 469 v1.1.1 (2006-5) © D. Tech 06
  29. 29. System Summary DVB-CDP TS 102 472 DVB-SPP TS 102 474 DVB-T EN 300 744 TR 101 190 DVB-SFN TS 101 191 DVB-ESG Mobile TS 102 471 Video DVB-H EN 302 304 TR 102 377 DVB-Data DVB-CBMS TR 102 469 EN 301 192 TR 101 202 DVB-SI EN 300 468 TS 102 470 2010/02/24 - 30 © D. Tech 06
  30. 30. Video Services on Mobiles Marie Josée Drouin, VSF Meeting, June 06 © D. Tech 06
  31. 31. DVB-H Services  Hierarchical offerings  Parallel Services  Typical configuration 2010/02/24 - 32 © D. Tech 06
  32. 32. Hierarchical Services (L1) Source: Hierarchical modulation — the transmission of two independent DVB-T multiplexes on a single frequency by 2010/02/24 - 33Alexander Schertz and Chris Weck (2003) © D. Tech 06
  33. 33. Parallel services (L2) 2010/02/24 - 34 Source: ETSI TR 102 377 v1.2.1 (2005-11) © D. Tech 06
  34. 34. Typical Configuration  Code-rate:  ½ (9,95Mbps*)  2/3 (13,27Mbps*)  FFT size: 4K  GI = ¼ or 112 µsec  16-QAM * for 6MHz channel 2010/02/24 - 35 © D. Tech 06
  35. 35. DVB-H in North-America  Modeo:  Formerly known as Crown Castle Mobile Media,  Announced in Jan 06 for this year roll-out of DVB-H services in top 30 markets in USA,  Testing DVB-H in Pittsburgh since June 04.  LookTV  Mobile high-speed and high-traffic environment,  Testing DVB-H with 2 transmitters in Milton, Ontario,  Since Jan 2006.  HiWire  Subsidiary of Aloha Partners,  Will launch mobile TV trial in autumn 06,  Aloha owns 12MHz / 700 MHz spectrum across US,  Partnered with SES Americom,  Testing DVB-H in Las Vegas since Jan 06. 2010/02/24 - 36 Source: DVB-H and Mobile TV Alliance Web sites © D. Tech 06
  36. 36. Conclusion: DVB-H  Fully Standardized End-to-End Service  Backward Compatible  Developed new Features for Mobiles  IP Based Service  Services are tested and rolled-out all over the World & North-America -> WATCH OUT ! 2010/02/24 - 37 © D. Tech 06
  37. 37. References  www.ipdc-forum.org  www.dvb-h.org  www.etsi.org  http://www.rfc-editor.org  www.mdtvalliance.org 2010/02/24 - 38 © D. Tech 06
  38. 38. Main Documents  ETSI TR 102 377 V1.2.1 (2005-11)  Digital Video Broadcasting (DVB);DVB-H Implementation Guidelines  DVB Bluebook A101 (2005-12)  IP Datacast over DVB-H: Content Delivery Protocols (CDP)  ETSI TR 102 469 V1.1.1 (2006-05)  Digital Video Broadcasting (DVB); IP Datacast over DVB-H: Architecture 2010/02/24 - 39 © D. Tech 06
  39. 39. mjdrouin@gmail.com Thank You Marie Josée Drouin, VSF Meeting, June 06 © D. Tech 06

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