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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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Content
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
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


Introduction1
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


Introduction2
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
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 technology2
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 technology3
The Technology

  • How DVB works

    • MPEG-2 describes Multiplexing too

    • Audio, Video, Add-on Datas


The technology4
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 technology5

Analog

DVB-S

The Technology


The technology6
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 technology7
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


The technology8
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
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
In the End…

…thanks for your attention !


5 references
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 ;)



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