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Video over IP goes wireless: A DVB-H Tutorial
The document provides an overview of DVB-H (Digital Video Broadcasting - Handheld), a standard for delivering digital television and radio services to mobile devices. It discusses key aspects of DVB-H including its basis on DVB-T, use of IP packets, and innovations like time-slicing to reduce power consumption and larger 4K FFT modes to address Doppler effects from mobility. The document also reviews the DVB-H protocol stack and how it solves issues at the physical, data link and network layers for mobile reception.
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Video over IP goes wireless: A DVB-H Tutorial
- 1. A DVB-H Tutorial Video over IP goes Wireless Marie Josée (MJ) Drouin, SMPTE Toronto Chapter BootCamp, June 8th, 2010 © D. Tech 2010
- 2. Who am I? Director with 15 years of Media experience, I lead technical teams of up to 30 people and 3 managers to deliver most aspects of the business - Operations, Customer Services, Information Technologies, Project Management, Engineering, and Procurement. I developed expertise in MJ Drouin© - May 19th, 2010 managing cable, wireless, satellite, transmission, engineering and software development. I worked at Bell, Teleglobe, Intelsat, CBC and as a expert consultant. Professional Engineer, Masters in Technological Management, ITIL foundation, PMP - VSF I have extensive experience in speaking since the 90's (ouf!), subjects were always a mix of technologies, commerce and management. Past engagements included: My video is a file, now what? (2010), Service Oriented Architecture: Tutorial for the Broadcasters (2010), Pitfalls of SW development: What every executive should know (2009), 8 weeks on Twitter: I love it! (2009), The Future of Broadcast Archive Systems (2008), DVB-H: Video over IP goes Wireless (2006), HDTV distribution (2005), Video over IP (2004) and, Several broadcast technical training (1994-1998): Video 101, Digital Video and Compression 201, Video testing techniques 301. http://www.linkedin.com/in/mjdrouin http://twitter.com/mjdrouin 2 © D. Tech 2010
- 3. © D. Tech2010
- 4. Agenda 1. Video overMobiles 2. DVB-H Technical Review 3. System Technical Review © D. Tech 2010
- 5. Introduction Smart Phones= 50% by Q3 2011 50% users watch video on Smart Phones Source: Nielsen’s data from Q3 2009 © D. Tech 2010
- 6. Video Over Mobiles Marie Josée (MJ) Drouin, SMPTE Toronto Chapter BootCamp, June 8th, 2010 © D. Tech 2010
- 7. Mobile: What’s different? Traditional DTV Display Uses wireline or large antennas Has unlimited 110V/220V power Is fixed Methods to view Video on mobile PodCast, mobile PVR Internet services Applications 3G/4G cell technology Parallel broadcast networks © D. Tech 2010
- 8. Broadcast or Telecom? Source:August 2009 CRTC Communications Monitoring Report © D. Tech 2010
- 9. Video over MobileStandards Standards Origin Dates ATSC-M/H ATSC T: 2006 US D: 2009 DVB-H DVB (ETSI) T: 2004 International D: 2006 Single-segment DiBEG (ARIB) T: 2004 ISDB-T Japan, Brazil D: 2006 DMB-T/H DAB/DMB (ETSI) T: 2006 China, Korea D: 2006 Legend: T: Public Trial, D: Commercial Deployment © D. Tech 2010
- 10. Standards per Country © D. Tech 2010
- 11. What is DVB-H? Built by DVB Standardized by ETSI Unidirectional Based on DVB-T, Digital TV terrestrial transport IP packets at the Network Layer Can be muxed with DVB-T CBR services © D. Tech 2010
- 12. DVB-H Technical Review Marie Josée (MJ) Drouin, SMPTE Toronto Chapter BootCamp, June 8th, 2010 © D. Tech 2010
- 13. DVB-T: OSI Layer1 3 2 DVB-T 1 Source: ETSI TR 102 377 v1.2.1 (2005-11) © D. Tech 2010
- 14. DVB-T Modifications (L1) DVB-H signaling in TPS-Bits: Mandatory Mandatory Signaling: Cell ID, Time Slicing DVB-H Options using TPS bits signaling: MPE-FEC, Interleaver depth, 4K mode 4K FFT size mode: Optional In-depth symbol interleaver: Optional 8K interleaver for 2k and 4k modes © D. Tech 2010
- 15. DVB-H Protocol Stack& OSI L2 3 DVB-H 2 DVB-T 1 Source: ETSI TR 102 377 v1.2.1 (2005-11) © D. Tech 2010
- 16. DVB-H Innovations (L2) Time-slicing: Mandatory Power reduction MPE-FEC: Optional C/N Doppler Impulse interference © D. Tech 2010
- 17. DVB-H System PSI/SI NIT Video INT Video TS DVB-T Receiver MPEG4 MPEG4 MPEG4 Encoder IP Encoder Encoder RF IRD H264 RF RF IP Backbone DVB-H Receiver * Inspired by ETSI TR 102 377 v1.2.1 (2005-11) © D. Tech 2010
- 18. Solving the Layer1&2 Issues Mobility – Doppler: 4K FFT size Power consumption: Time Slicing © D. Tech 2010
- 19. Doppler Effect (L1) Mobiles IRD Source: ETSI TR 102 377 v1.2.1 (2005-11) © D. Tech 2010
- 20. 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 Source: ETSI TR 102 377 v1.2.1 (2005-11) & ETSI EN 300 744 V.1.5.1 (2004-11) 2010 © D. Tech
- 21. Power Consumption (L2) Source:ETSI TR 102 377 v1.2.1 (2005-11) © D. Tech 2010
- 22. Time-Slicing (L2) Equivalent Limited by the memory of the receiver MPE Sections Source: ETSI TR 102 377 v1.2.1 (2005-11) © D. Tech 2010
- 23. Solving the Layer3&4 Issues IP Datacast: Content Delivery Protocol (CDP) Architecture for Convergence of Broadcast and Mobile Services (TM-CBMS) © D. Tech 2010
- 24. CDP OSI Layer3 CDP 3 DVB-H 2 DVB-T 1 Source: ETSI TR 102 377 v1.2.1 (2005-11) © D. Tech 2010
- 25. CDP Protocol Stack(L3&4) 7 ISO 13818 6 SMPTE 2022 RFC 2250 ETSI 5 RFC 3984 RFC 3550 RFC 3926 RFC 2616 4 3 ETSI 3GPP 2 Return Channel – not mandatory 1 Source: ETSI TS 102 472 V1.1.1 (2006-06) © D. Tech 2010
- 26. System Technical Review Marie Josée (MJ) Drouin, SMPTE Toronto Chapter BootCamp, June 8th, 2010 © D. Tech 2010
- 27. Putting it together:TM-CBMS Source: ETSI TR 102 469 v1.1.1 (2006-5) © D. Tech 2010
- 28. Future: Wireless Billboards? © D. Tech 2010
- 29. 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 ATSC-M/H faces very similar complexities © D. Tech 2010
- 30. mjdrouin@gmail.com Thank You Marie Josée (MJ) Drouin, SMPTE Toronto Chapter BootCamp, June 8th, 2010 © D. Tech 2010