Here DVB stands for Digital Video Broadcasting, it is a suite of internationally accepted open standards for digital television. DVB standards are maintained by the DVB Project, an international industry consortium with more than 270 members, and they are published by a Joint Technical Committee (JTC) of European Telecommunications Standards Institute (ETSI), European Committee for Electrotechnical Standardization (CENELEC) and European Broadcasting Union (EBU). The interaction of the DVB sub-standards is described in the DVB Cookbook. Many aspects of DVB are patented, including elements of the MPEG video coding and audio coding. (More about DVB on WiKi-Digital Video Broadcasting)

Data are distributed by DVB systems through a variety of approaches, they are:

• * satellite: DVB-S, DVB-S2 and DVB-SH – DVB-SMATV for distribution via SMATV
• * cable: DVB-C, DVB-C2
• * terrestrial television: DVB-T, DVB-T2 – digital terrestrial television for handhelds: DVB-H, DVB-SH
• * microwave: using DTT (DVB-MT), the MMDS (DVB-MC), and/or MVDS standards (DVB-MS)

And among the four approaches, satellite is the most important one that allows us to watch TV on our computer everywhere we go. To do this, one just need to have a Digital TV player softwarein his computer and a hardware receiver.