Digital Video Broadcasting Technology
DVB System - MPEG-2 systems layer

MPEG-2 systems layer defines how various elementary streams representing one or multiple programmes are multiplexed together. The elementary streams can carry video, audio, data, and other information. This multiplexing process creates a single (multi-programme transport) data stream that can be stored or transmitted via a physical medium. In general, the MPEG-2 systems layer performs more functions:

First two functions are described below the characterization of other two can be found in [22]. In this chapter we use a term “programme”. It has a lot of meanings but we will think of it as a single broadcasting service or channel.

Figure below shows a block diagram illustrating all main operations that have to be done at a transmitter side to broadcast a digital content to users [20]. At first all programmes have to be encoded and multiplexed. The resulting transport stream is equipped by error protecting codes and modulated to a carrier. At a last phase the signal is amplified and sent to the transmission medium.

Main operations performed at transmitter side