Digital Signage
Broadcasting
Content Management
and
Distribution Techniques
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Chapter 2. What is Digital TV?


Digital TV is really a way of sending a description of the television signal rather than the physical signal itself. Chapter 2 describes the basics of digital television along with fundamental principles for compression of signals. The intention has been to make a simple visual description of video compression.


The compressed TV signals need to be transported and to do this the Digital Video Broadcasting (DVB) transport stream may be the tool. This transport stream format is described along with ways to optimize the number of TV channels to be carried in a satellite transponder. The chapter contains 13 illustrations 4 of which are in the color insert.



Digital TV is different from analog TV when it comes to distortions. Either you have a perfect picture or no picture at all. However there is a very narrow range between acceptable reception and loss of signal where you will see blocking effects in the picture.


© Lars-Ingemar Lundström, All rights reserved.


Understanding Digital Television