Digital Video Broadcasting
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Because the data stream can be compressed, this allows to have more TV channels per frequency range than when analogue channels are used.
There are different standards, some of them are
- DVB-S, DVB-S2: Use Satellites to broadcast
- DVB-C: Use a coaxial cable
- DVB-T, DVB-T2: Use a terrestrial signal, relayed thorough various stations
Digital Audio Broadcasting is something similar for audio.