Insights in DVB-T

Content 1.Introduction Historical background Objectives of Digital TV What is DVB ? 2.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 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

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

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

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

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

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

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

The Technology DVB-S Analog

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 ;)

The Technology The Roadmap of DVB-T 4. November 2004 successfully adapted in 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

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

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

In the End… …thanks for your attention !

5. References Literature Digitale Fernsehtechnik – Datenkompression und Übertragung für DVBInternet from Ulrich Reimers (Springer Publishing) Internet and of coursewww.google.dewww.heise.de dict.leo.org ;)

Questions ?