Digital Video Broadcasting (DVB) is a set of globally open standards that define digital broadcasting using existing cable, satellite and terrestrial infrastructures. These standards define the data link layer and physical layer of the distribution system. Similar to all digital communication systems, DVB uses the simple yet powerful binary digit pair i.e. ones and zeros, to link to the data that is being transmitted.
Digital Television is the most accepted type of transmission handled by DVB, which consists of an Electronic Programme Guide, an audio stream, video stream and typical teletext data. To stop external piracy in digital television broadcasting, DVB uses conditional access (CA) systems.