DVB (Digital Video Broadcast)
DVB (Digital Video Broadcast) is a set of standards for the digital transmission of video and audio streams, and also data transmission.
The DVB standards are maintained by the DVB Project, which is an industry-led consortium of over 260 broadcasters, manufacturers, network operators, software developers, regulatory bodies and others in over 35 countries.
DVB standards are available on the web at the ETSI Publications Download Area.
DVB has been implemented over satellite (DVB-S, DVB-S2), cable (DVB-C), terrestrial broadcasting (DVB-T), and handheld terminals (DVB-H).
DVB utilizes MPEG-2 compression.
DVB primarily uses Musicam audio encoding, but also has optional support for AC3.
DVB-H
DVB-H is the implementation of DVB (Digital Video Broadcast) over handheld terminals.
DVB-H is designed to enable digital television to be delivered to handheld televisions.
DVB-H uses the Reed-Solomon algorithm for Forward Error Correction (FEC).
DVB-H supports QPSK, 16QAM, and 64QAM for modulation.
DVB-H is based upon, and is an extension of, DVB-T.
The most important change from DVB-T to DVB-H was to use time-slicing to conserve battery power on handheld terminals.
DVB-H has been ratified by the ETSI as ETSI EN 302 304.
DVB-S
DVB-S is the implementation of DVB (Digital Video Broadcast) over satellite.
DVB-S2, an improved revision of DBV-S, has been ratified by the ETSI as ETSI EN 302 307.
DVB-S2 uses a combination of the BCH (Bose-Chaudhuri-Hocquenghem) and LDPC (Low Density Parity Check) algorithms for Forward Error Correction (FEC).
DVB-S2 supports QPSK, 8PSK, 16APSK, and 32APSK for modulation.
DVB-T
DVB-T is the implementation of DVB (Digital Video Broadcast) over terrestrial wireless.
DVB-T is used for broadcast television in Europe. In the United States, ATSC was selected over DVB-T.
DVB-T uses the Reed-Solomon algorithm for Forward Error Correction (FEC) and COFDM (Coded Orthogonal Frequency-Division Multiplexing) for modulation.
DVB-T has been ratified by the ETSI as ETSI EN 302 304.
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