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Insights in DVB-T

Insights in DVB-T. Content. Introduction Historical background Objectives of Digital TV What is DVB ? The Technology Why Digital ? How DVB-T works What I have to expect ? What I need The Roadmap. Introduction. Historical background Japan is using MUSE

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Insights in DVB-T

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  1. Insights in DVB-T

  2. Content • Introduction • Historical background • Objectives of Digital TV • What is DVB ? • The Technology • Why Digital ? • How DVB-T works • What I have to expect ? • What I need • The Roadmap

  3. Introduction • Historical background • Japan is using MUSE • 1991 first Discussions in Germany • European DVB-Project founded in 1993 • At the same Time MPEG works on Encoding Std. • DVB-Project decides to use MPEG-2 • Today: 300 Organisations from 37 Lands • Common Carrier • Manufacturers • Broadcast Stations • Authorities

  4. Introduction • Objectives of Digital-TV • Primary Objectives like HDTV changed • Now: • Multiplication of programs which can be sent over a transmission line. • DTVB enables Audio transmissions • DTVB enables flexible choice of Quality • Encryption can be used for Pay-Services • DTVB can be used as Data Transfer Method

  5. Introduction • What is DVB ? • Describes Digital Video Broadcasting Standards • Most used Standard for Digital Television • Standards like (in this order): • DVB-S for Satellite Transmissions • DVB-C for Cable Transmissions • DVB-T for Terrestrial Transmissions

  6. The Technology • Why Digital ? • Digital Technology‘s displace Analog • Analog Receiving is rarely "Perfect" • Interferences • Mountains • Buildings • Forrest’s • other Emitters • Few Programs • DVB-T uses COFDM • Informations divided on many Frequencies • Along-sent Error Corrections • Common Frequency Broadcasting

  7. The Technology

  8. The Technology • How DVB works • Playout-Centers sent Data Containers • Data Containers with different size • DVB-S and DVB-C  ~ 40 Mbit/s • DVB-T  ~ 15 Mbit/s

  9. The Technology • How DVB works • MPEG-2 describes Multiplexing too • Audio, Video, Add-on Datas

  10. The Technology • What I have to expect ? • You can use very small Antennas • You can watch TV in your Car • Enough Signal Power  nearly perfect Picture • Less Signal Power  a black Screen • Regardless… • not necessarily a better Picture • Some Stations use old Encoders • Rarely a Dolby-Digital Soundtrack

  11. Analog DVB-S The Technology

  12. The Technology • What I need • A new Set-Top-Box for each Device…paid by yourself • DVB-C Receivers can NOT be used ! • A Dolby Digital Receiver if you wish • That‘s all ;)

  13. The Technology • The Roadmap of DVB-T • 4. November 2004 successfully adaptedin Berlin-Brandenburg • 2004 • Hannover/Braunschweig: 24. Mai 2004 • Bremen/Unterweser: 24. Mai 2004 • Köln/Bonn: 24. Mai 2004 • Hamburg/Lübeck: 8. November • Kiel: 8. November • Düsseldorf/Ruhrgebiet: 8. November

  14. The Technology • The Roadmap of DVB-T • 2005 • Halle/Leipzig • Erfurt/Weimar • Mainz/Wiesbaden/Frankfurt • Ludwigshafen/Mannheim • Stuttgart • Nürnberg • München • 2010 Everywhere in Germany

  15. My Opinion • Generally • Quite a good thing • Advantages like EPG and much more Programs • But there are no reasons to wait… • You can use DVB-S instead • In Future • Interactive Contents (Backchannel required) • Eventuelly HDTV

  16. In the End… …thanks for your attention !

  17. 5. References • Literature • Digitale Fernsehtechnik – Datenkompression und Übertragung für DVBInternetfrom Ulrich Reimers (Springer Publishing) • Internet • www.dvb.org • www.ueberall-tv.org • and www.google.de - www.heise.de of course • dict.leo.org ;)

  18. Questions ?

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