DVB (Digital Video Broadcasting) is a series of internationally recognized digital television open standards maintained by the DVB project.
There are several types of transmission methods for DVB systems: satellite (DVB-S and DVB-S2), cable (DVB-C), terrestrial radio (DVB-T) and handheld terrestrial radio (DVB-H).
The main difference between these transmission methods is the modulation method used, since different frequency bandwidth requirements apply. QPSK modulation is used for DVB-S using a high-frequency carrier, QAM-64 modulation is used for DVB-C using a low-frequency carrier, and COFDM modulation is used for DVB-T using a VHF and a UHF carrier.
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