Insights in DVB-TInsights in DVB-TInsights in DVB-TInsights 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

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 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 ;)

Questions ?