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| {{Table Digital video broadcast standards}}
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| '''DVB-T''' is an abbreviation for "'''Digital Video Broadcasting — Terrestrial'''"; it is the [[Digital Video Broadcasting|DVB]] European-based consortium standard for the broadcast transmission of [[digital terrestrial television]] that was first published in 1997<ref name=autogenerated1>{{cite web|url=http://www.radio-electronics.com/info/broadcast/digital-video-broadcasting/what-is-dvb-t-basics-tutorial.php|title=What is DVB-T|accessdate=2009-07-19}}</ref> and first broadcast in the [[United Kingdom|UK]] in 1998.<ref name=autogenerated1 /> This system transmits [[video compression|compressed]] [[digital audio]], [[digital video]] and other data in an [[MPEG transport stream]], using coded [[orthogonal frequency-division multiplexing]] (COFDM or OFDM) modulation.
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| ==Basics==
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| Rather than carrying one data carrier on a single [[radio frequency]] (RF) channel, [[COFDM]] works by splitting the digital data stream into a large number of slower digital streams, each of which digitally modulate a set of closely spaced adjacent sub-carrier frequencies. In the case of DVB-T, there are two choices for the number of carriers known as 2K-mode or 8K-mode. These are actually 1,705 or 6,817 sub-carriers that are approximately 4 kHz or 1 kHz apart.
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| DVB-T offers three different modulation schemes ([[QPSK]], [[16QAM]], [[64QAM]]).
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| DVB-T has been adopted or proposed for digital television broadcasting by many countries ([[DVB-T#Countries_and_territories_using_DVB-T|see map]]), using mainly VHF 7 MHz and UHF 8 MHz channels whereas Taiwan, Colombia, Panama, Trinidad and Tobago and the Philippines use 6 MHz channels. Examples include the UK's [[Freeview (UK)|Freeview]].
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| The DVB-T Standard is published as EN 300 744, ''Framing structure, channel coding and modulation for digital terrestrial television''. This is available from the [[ETSI]] website, as is ETSI TS 101 154, ''Specification for the use of Video and Audio Coding in Broadcasting Applications based on the MPEG-2 Transport Stream'', which gives details of the DVB use of source coding methods for [[MPEG-2]] and, more recently, [[H.264/MPEG-4 AVC]] as well as audio encoding systems. Many countries that have adopted DVB-T have published standards for their implementation. These include the [[D-book]] in the UK, the Italian DGTVi,<ref>{{cite web | url = http://www.dgtvi.it | title = DGTVi - Per la Televisione Digitale Terrestre}}</ref> the ETSI E-Book and Scandivia NorDig.
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| DVB-T has been further developed into newer standards such as [[DVB-H]] (Handheld), which was a commercial failure and is no longer in operation, and [[DVB-T2]], which was initially finalised in August 2011.
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| DVB-T as a digital transmission delivers data in a series of discrete blocks at the symbol rate. DVB-T is a [[COFDM]] transmission technique which includes the use of a Guard Interval. It allows the receiver to cope with strong multipath situations. Within a geographical area, DVB-T also allows [[single-frequency network]] (SFN) operation, where two or more transmitters carrying the '''same''' data operate on the same frequency. In such cases the signals from each transmitter in the SFN needs to be accurately time-aligned, which is done by sync information in the stream and timing at each transmitter referenced to [[GPS]].
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| The length of the Guard Interval can be chosen. It is a trade off between data rate and [[single-frequency network|SFN]] capability. The longer the guard interval the larger is the potential SFN area without creating [[intersymbol interference]] (ISI). | |
| It is possible to operate SFNs which do not fulfill the guard interval condition if the self-interference is properly planned and monitored.
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| ==Technical description of a DVB-T transmitter==
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| [[Image:dvbt tx scheme.svg|thumb|600px|Scheme of a DVB-T transmission system]]
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| With reference to the figure, a short description of the signal processing blocks follows.
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| ; '''[[Source coding]] and MPEG-2 [[multiplexing]] (MUX)''': compressed video, compressed audio, and data streams are multiplexed into [[MPEG program stream]]s (MPEG-PSs). One or more MPEG-PSs are joined together into an [[MPEG transport stream]] (MPEG-TS); this is the basic digital stream which is being transmitted and received by TV sets or home [[Set top box|Set Top Boxes]] (STB). Allowed [[bitrate]]s for the transported data depend on a number of coding and modulation parameters: it can range from about 5 to about 32 [[Mbit/s]] (see the bottom figure for a complete listing).
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| ; '''Splitter''': two different MPEG-TSs can be transmitted at the same time, using a technique called ''Hierarchical Transmission''. It may be used to transmit, for example a standard definition [[SDTV]] signal and a high definition [[HDTV]] signal on the same [[carrier wave|carrier]]. Generally, the SDTV signal is more robust than the HDTV one. At the receiver, depending on the quality of the received signal, the STB may be able to decode the HDTV stream or, if signal strength lacks, it can switch to the SDTV one (in this way, all receivers that are in proximity of the transmission site can lock the HDTV signal, whereas all the other ones, even the farthest, may still be able to receive and decode an SDTV signal).
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| ; '''MUX adaptation and energy dispersal''': the MPEG-TS is identified as a sequence of [[Packet (information technology)|data packets]], of fixed length (188 bytes). With a technique called [[Scrambler (randomizer)|energy dispersal]], the byte sequence is [[correlation|decorrelated]].
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| ; '''External encoder''': a first level of error correction is applied to the transmitted data, using a non-binary [[block code]], a [[Reed-Solomon]] RS (204, 188) code, allowing the correction of up to a maximum of 8 wrong bytes for each 188-byte packet.
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| ; '''External [[interleaver]]''': [[convolutional interleaving]] is used to rearrange the transmitted data sequence, in such a way that it becomes more rugged to long sequences of errors.
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| ; '''Internal encoder''': a second level of error correction is given by a punctured [[convolutional code]], which is often denoted in STBs menus as FEC ([[Forward error correction]]). There are five valid coding rates: 1/2, 2/3, 3/4, 5/6, and 7/8.
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| ; '''Internal interleaver''': data sequence is rearranged again, aiming to reduce the influence of burst errors. This time, a block interleaving technique is adopted, with a pseudo-random assignment scheme (this is really done by two separate interleaving processes, one operating on bits and another one operating on groups of bits).
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| ; '''Mapper''': the digital bit sequence is mapped into a base band modulated sequence of complex symbols. There are three valid [[modulation]] schemes: [[QPSK]], 16-[[QAM]], 64-QAM.
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| ; '''Frame adaptation''': the complex symbols are grouped in blocks of constant length (1512, 3024, or 6048 symbols per block). A [[Frame synchronization|frame]] is generated, 68 blocks long, and a ''superframe'' is built by 4 frames.
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| ; '''Pilot and TPS signals''': in order to simplify the reception of the signal being transmitted on the terrestrial [[radio channel]], additional signals are inserted in each block. Pilot signals are used during the synchronization and equalization phase, while TPS signals (Transmission Parameters Signalling) send the parameters of the transmitted signal and to unequivocally identify the transmission cell. The receiver must be able to synchronize, equalize, and decode the signal to gain access to the information held by the TPS pilots. Thus, the receiver must know this information beforehand, and the TPS data is only used in special cases, such as changes in the parameters, resynchronizations, etc.
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| [[Image:dvbt spectrum.jpg|thumb|250px|Spectrum of a DVB-T signal in 8k mode (note the flat-top characteristics).]]
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| ; '''OFDM Modulation''': the sequence of blocks is modulated according to the [[Orthogonal frequency-division multiplexing|OFDM]] technique, using 1705 or 6817 carriers (2k or 8k mode, respectively). Increasing the number of carriers does not modify the payload bit rate, which remains constant.
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| ; '''Guard interval insertion''': to decrease receiver complexity, every OFDM block is extended, copying in front of it its own end ([[cyclic prefix]]). The width of such guard interval can be 1/32, 1/16, 1/8, or 1/4 that of the original block length. Cyclic prefix is required to operate single frequency networks, where there may exist an ineliminable interference coming from several sites transmitting the same program on the same carrier frequency.
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| ; '''DAC and front-end''': the digital signal is transformed into an analogue signal, with a [[digital-to-analogue converter]] (DAC), and then modulated to radio frequency ([[Very high frequency|VHF]], [[Ultra high frequency|UHF]]) by the [[RF front end]]. The occupied bandwidth is designed to accommodate each single DVB-T signal into 5, 6, 7, or 8 [[Megahertz|MHz]] wide channels. The base band sample rate provided at the DAC input depends on the channel bandwidth: it is <math>f_s = \frac{8}{7} B</math> ''samples/s'', where <math>B</math> is the channel bandwidth expressed in Hz.
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| {| class="wikitable" style="width: 40em;"
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| |-
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| ! colspan="6" | Available bitrates (Mbit/s) for a DVB-T system in 8 MHz channels
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| |-
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| ! rowspan="2" | Modulation
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| ! rowspan="2" | Coding rate
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| ! colspan="4" | [[Guard interval]]
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| |-
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| |''1/4''||''1/8''||''1/16''||''1/32''
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| |-
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| ! rowspan="5" | [[Quadrature phase-shift keying|QPSK]]
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| |''1/2''||4.976||5.529||5.855||6.032
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| |-
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| |''2/3''||6.635||7.373||7.806||8.043
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| |-
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| |''3/4''||7.465||8.294||8.782||9.048
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| |-
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| |''5/6''||8.294||9.216||9.758||10.053
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| |-
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| |''7/8''||8.709||9.676||10.246||10.556
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| ! rowspan="5" | 16-[[Quadrature amplitude modulation|QAM]]
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| |''1/2''||9.953||11.059||11.709||12.064
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| |-
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| |''2/3''||13.271||14.745||15.612||16.086
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| |-
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| |''3/4''||14.929||16.588||17.564||18.096
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| |-
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| |''5/6''||16.588||18.431||19.516||20.107
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| |-
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| |''7/8''||17.418||19.353||20.491||21.112
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| ! rowspan="5" | 64-[[Quadrature amplitude modulation|QAM]]
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| |''1/2''||14.929||16.588||17.564||18.096
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| |-
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| |''2/3''||19.906||22.118||23.419||24.128
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| |''3/4''||22.394||24.882||26.346||27.144
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| |''5/6''||24.882||27.647||29.273||30.160
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| |-
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| |''7/8''||26.126||29.029||30.737||31.668
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| |}
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| ==Technical description of the receiver==
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| The receiving STB adopts techniques which are dual to those ones used in the transmission.
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| * '''Front-end and ADC:''' the analogue RF signal is converted to base-band and transformed into a digital signal, using an [[analogue-to-digital converter]] (ADC).
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| * '''Time and frequency synchronization:''' the digital base band signal is searched to identify the beginning of frames and blocks. Any problems with the frequency of the components of the signal are corrected, too. The property that the guard interval at the end of the symbol is placed also at the beginning is exploited to find the beginning of a new [[OFDM symbol]]. On the other hand, continual pilots (whose value and position is determined in the standard and thus known by the receiver) determine the frequency offset suffered by the signal. This frequency offset might have been caused by [[Doppler effect]], inaccuracies in either the transmitter or receiver clock, and so on. Generally, synchronization is done in two steps, either before or after the FFT, in such way to resolve both coarse and fine frequency/timing errors. Pre-FFT steps involve the use of sliding correlation on the received time signal, whereas Post-FFT steps use correlation between the frequency signal and the pilot carriers sequence.
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| * '''Guard interval disposal:''' the cyclic prefix is removed.
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| * '''OFDM demodulation:''' this is achieved with an FFT.
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| * '''Frequency [[equalization]]:''' the pilot signals are used to estimate the Channel Transfer Function (CTF) every three subcarriers. The CTF is derived in the remaining subcarriers via interpolation. The CTF is then used to equalize the received data in each subcarrier, generally using a Zero-Forcing method (multiplication by CTF inverse). The CTF is also used to weigh the reliability of the demapped data when they are provided to the Viterbi decoder.
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| * '''Demapping:''' since there are Gray-encoded QAM constellations, demapping is done in a "soft" way using nonlinear laws that demap each bit in the received symbol to a more or less reliable fuzzy value between -1 and +1.
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| * '''Internal deinterleaving'''
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| * '''Internal decoding:''' uses the [[Viterbi algorithm]], with a traceback length larger than that generally used for the basic 1/2 rate code, due to the presence of punctured ("erased") bits.
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| * '''External deinterleaving'''
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| * '''External decoding'''
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| * '''MUX adaptation'''
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| * '''MPEG-2 demultiplexing and source decoding'''
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| ==Countries and territories using DVB-T==
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| [[Image:Digital broadcast standards.svg|thumb|600px|center|Digital terrestrial television systems worldwide. Countries using DVB-T are shown in blue.<ref>[http://www.dvb.org/about_dvb/dvb_worldwide/index.xml DVB.org], Official information taken from the DVB website</ref>]]
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| {{Multicol|100%}}
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| ===America===
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| * {{flag|Bermuda}} (decided on July 10, 2007)<ref>[http://www.dvb.org/about_dvb/dvb_worldwide/bermuda/index.xml DVB - Digital Video Broadcasting - Bermuda]</ref>
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| * {{flag|Colombia}} (decided on August 28, 2008) <ref>''[[El Espectador]]'', [http://elespectador.com/node/34794/ Colombia adopta el estándar europeo para la tv digital terrestre], 28 August 2008</ref> (Uses DVB-T/H.264/[[MPEG-4]] for SD and HD. Is considering moving to DVB-T2/H.264/[[MPEG-4]]) <ref>''[[Evaluamos]]'', [http://www.evaluamos.com/2011/internal.php?load=detail&id=12557 TV Digital no ha llegado a toda Colombia y la CNTV ya piensa en modificar la norma], July 2011</ref>
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| * {{flag|Panama}} (decided on May 12, 2009) <ref>[http://www.dvb.org/news_events/news/panama-adopts-dvb-t/index.xml Panama adopts DVB-T]</ref> (uses DVB-T/[[MPEG-2]] for SD and DVB-T/H.264/[[MPEG-4]] for HD transmissions.)
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| * {{flag|Trinidad and Tobago}}
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| * {{flag|Curacao}} (experimental DVB-T MPEG2){{Citation needed|date=April 2011}}
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| * {{flag|Falkland Islands}} (In 2008 KTV Ltd. implements DVB-T, 64QAM, 7/8, 1/32, MPEG2 for boths SD and HD transmissions){{citation needed|date=July 2012}} <ref>[http://www.ktv.co.fk The Falkland Islands adopts DVB-T]</ref>
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| ===Europe===
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| * {{flag|Albania}} (uses [[MPEG-2]] for SD and [[MPEG-4 AVC /H.264]] for HD transmissions.
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| * {{flag|Andorra}}
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| * {{flag|Austria}}
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| * {{flag|Belgium}}
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| * {{flag|Belarus}} (uses DVB-T [[MPEG-4 AVC /H.264]] for SD transmission and [[DVB-T2]] for pay SD transmissions)
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| * {{flag|Bulgaria}} ([[MPEG-4 AVC]], FEC=2/3, guard interval - 1/4, 64 QAM. Official simulcast started in March 2013, full switch has been done in 30 September 2013.)<ref>{{cite web| url=http://www.mtitc.government.bg/upload/docs/DVB_T_Plan_2012.doc| title=Plan for the introduction of terrestrial digital television broadcasting(DVB-T) in the Republic of Bulgaria| publisher=Ministry of Transportation, Information Technology and Communications| language=[[Bulgarian language|Bulgarian]]| accessdate=2012-12-17}}</ref><ref>{{cite web| url=http://nurts.bg/en/uslugi/%D1%86%D0%B8%D1%84%D1%80%D0%BE%D0%B2%D0%B0-%D0%B5%D1%84%D0%B8%D1%80%D0%BD%D0%B0-%D1%82%D0%B5%D0%BB%D0%B5%D0%B2%D0%B8%D0%B7%D0%B8%D1%8F-dvb-t/| title=Digital Television| publisher=NURTS (TV tower operator)| language=[[English language|English]]| accessdate=2012-12-17}}</ref>
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| * {{flag|Croatia}} (see [[DVB-T in Croatia]])
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| * {{flag|Czech Republic}} (MPEG-2, MPEG-4 experimental in Prague and surroundings)
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| * {{flag|Cyprus}} (MPEG-4 video)
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| * {{flag|Denmark}} (uses [[MPEG-4]] for SD and HD transmissions. See [[DVB-T in Denmark]].)
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| ** {{flag|Faroe Islands}}
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| ** {{flag|Greenland}} ([http://www.nuuktv.gl Nuuk tv])
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| * {{flag|Estonia}} (uses [[MPEG-4]] video)
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| * {{flag|Finland}}
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| * {{flag|France}} (uses [[MPEG-2]] for free SD and [[MPEG-4]] for free HD, pay SD and pay HD transmissions.See [[Digital_terrestrial_television#France]].)
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| * {{flag|Germany}} (usually [[MPEG-2]], SD only, [http://www.ueberallfernsehen.de Überallfernsehen])
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| * {{flag|Greece}} ([http://tvradio.ert.gr/digital/ ERT Digital] and [http://www.digital-union.eu/ Digital Union] use [[MPEG-2]] but will shift to [[H.264/MPEG-4 AVC]]. [http://www.digea.gr Digea], [http://www.ert.gr/ ERT / ERT HD] and [http://www.digital-union.eu/ Digital Union (in Region of Thessalia)] use [[H.264/MPEG-4 AVC]])
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| * {{flag|Hungary}} (branded [http://www.mindigtv.hu MinDigTV], uses [[H.264/MPEG-4 AVC]] video exclusively.)
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| * {{flag|Iceland}}<ref>{{cite web| url=http://www.fjarskiptahandbokin.is/index.php?option=com_content&task=view&id=75&Itemid=125| title=Digital Ísland| publisher=fjarskiptahandbokin.is| language=[[Icelandic language|Icelandic]]| accessdate=2009-10-27}}</ref>
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| * {{flag|Ireland}} (uses [[MPEG-4]] for SD and HD transmissions)
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| {{Multicol-break}}
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| * {{flag|Italy}} (uses MPEG2 for SD, MPEG 4 AVC for HD)
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| * {{flag|Latvia}} (uses H.264/MPEG-4 AVC)
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| * {{flag|Lithuania}} (uses H.264/MPEG-4 AVC)
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| * {{flag|Luxembourg}}
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| * {{flag|Macedonia}} ([[Television in Macedonia|DVB-T in Macedonia]])
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| * {{flag|Malta}}
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| * {{flag|Moldova}} (uses [[MPEG-2]]. [[MPEG-4]] is being tested.)
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| * {{flag|Montenegro}}
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| * {{flag|Netherlands}} ([[MPEG-2]] SD, operated by [[KPN#Netherlands|Digitenne]])
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| * {{flag|Norway}} (uses [[MPEG-4]] for SD and HD transmissions)
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| * {{flag|Poland}} (uses [[MPEG-4/H.264]] video for SD and HD transmissions; see ''[[Television in Poland#Terrestrial|DVB-T in Poland]]'')
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| * {{flag|Portugal}} (uses [[MPEG-4/H.264]] video;)
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| * {{flag|Romania}} (uses [[MPEG-2]] for SD and [[MPEG-4]] for HD transmissions.).Since June 2011, shifted to MPEG4 both for SD and HD transmissions, and plans to use DVB-T2 from 2015.
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| * {{flag|Russia}} (will use [[DVB-T2]]/[[MPEG-4]]<ref>{{cite web|url=http://advanced-television.com/index.php/2011/09/29/russia-adopts-dvb-t2/|title=Russia adopts DVB-T2}}</ref>)
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| * {{flag|Serbia}} (uses DVB-T2 [[MPEG-4/H.264]] <ref>{{cite web|url=http://etv.rs/vesti/74-pilot-mreza|title=ETV: trial DVB-T2 network|language=Serbian|accessdate=2012-03-22}}</ref>)
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| * {{flag|Slovakia}} (uses [[MPEG-2]] for SD and [[MPEG-4]] for HD, testing [[DVB-T2]]/[[MPEG-4]])
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| * {{flag|Slovenia}} (uses [[MPEG-4]] video since 2007. See [[DVB-T in Slovenia]])
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| * {{flag|Spain}} (uses DVB-T/[[MPEG-2]] for SD and DVB-T/H.264/[[MPEG-4]] for HD transmissions.)
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| * {{flag|Sweden}} (uses [[MPEG-2]]/[[MPEG-4]]) for SD and [[DVB-T2]] with [[MPEG-4]] for SD and HD transmissions. See [[DVB-T in Sweden]].)
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| * {{flag|Switzerland}}
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| * {{flag|Turkey}} (experimental)
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| * {{flag|United Kingdom}} (uses DVB-T/[[MPEG-2]] for SD and [[DVB-T2]]/H.264/[[MPEG-4]] for HD transmissions. See [[Digital terrestrial television in the United Kingdom|DVB-T in United Kingdom]].)
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| * {{flag|Ukraine}} (uses [[DVB-T2]]/[[MPEG-4]] for all nationwide broadcasts)
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| ===Oceania===
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| * {{flag|Australia}} (uses DVB-T/[[MPEG-2]] for both SD and HD transmissions.)
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| * {{flag|New Zealand}} (uses MPEG-4/H.264 video; see [[Freeview (New Zealand)|Freeview]] New Zealand)
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| ===Asia===
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| * {{flag|Bahrain}} (in assessment)
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| * {{flag|India}} (uses [[MPEG-2]] for SD and [[MPEG-4]] for HD transmissions)
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| * {{flag|Indonesia}} (adopted DVB-T2 on February 2, 2012) <ref>[http://web.kominfo.go.id/sites/default/files/Permen%2037%20Standar%20Penyiaran%20TV%20Digital.pdf Standar Penyiaran Televisi Digital]</ref>
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| * {{flag|Iran}} (uses DVB-T MPEG-4/H.264/AAC SD :720x576i HD :1920x1080i)
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| {{Multicol-break}}
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| * {{flag|Iraq}} (started in Kurdistan region-Iraq by MIX Media 31-12-2011 uses MPEG-4)
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| * {{flag|Israel}} (uses MPEG-4/H.264 video)
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| * {{flag|Jordan}} (in assessment){{Citation needed|date=July 2010}}
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| * {{flag|Kuwait}} (will use MPEG-2 for SD and MPEG-4 for HD transmissions)
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| * {{flag|Lebanon}} (in assessment){{Citation needed|date=July 2010}}
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| * {{flag|Malaysia}} (experimental, may also adopt DMB-T/H, also experimenting with DVB-T2 as of 2011, may abandon DVB-T1 and go with DVB-T2 upon launch)
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| * {{flag|Maldives}}
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| * {{flag|Myanmar}}
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| * {{flag|Oman}} (in assessment)
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| * {{flag|Palestine}} (in assessment){{Citation needed|date=July 2010}}
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| * {{flag|Qatar}} (in assessment)
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| * {{flag|Singapore}}
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| * {{flag|Saudi Arabia}} (will use MPEG-2 for SD and MPEG-4 for HD transmissions)
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| * {{flag|Syria}} (will use DVB-T, MPEG-2 and MPEG-4.) {{Citation needed|date=July 2010}}
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| * {{flag|Sri Lanka}} (pilot service <ref>Lankanewspapers.com, [http://www.lankanewspapers.com/news/2008/1/23985.html Dialog TV launches another South Asia's first DVBT], 2008-01-24. Retrieved on 2008-01-26.</ref>)( will uses [[DVB-T2]]/[[MPEG-4]]/[[H.264]]/[[Advanced Audio Coding|AAC]] [[High-definition video|HD]]:1920x1080i)
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| * {{flag|Taiwan}} (uses DVB-T/[[MPEG-2]] for SD and DVB-T/H.264/[[MPEG-4]] for HD transmissions)
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| * {{flag|Thailand}} (experimental [[DVB-T2]])
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| * {{flag|Vietnam}} (may abandon DVB-T1 and go with DVB-T2 by 2014)
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| * {{flag|United Arab Emirates}} (will use MPEG-2 for SD and MPEG-4 for HD transmissions)
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| * {{flag|Uzbekistan}}
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| * {{flag|Yemen}} (in assessment)
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| ===Africa===
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| * {{flag|Algeria}}
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| * {{flag|Ghana}}
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| * {{flag|Cape Verde}}
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| * {{flag|Kenya}} (Will use DVB-T2[[MPEG-4]])
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| * {{flag|Mauritius}}
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| * {{flag|Morocco}}
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| * {{flag|Namibia}}
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| * {{flag|South Africa}} (will use DVB-T2, after briefly considering [[ISDB-T]])<ref>{{cite web | url=http://www.businessday.co.za/articles/Content.aspx?id=127899 | title=BusinessDay - State U-turn on Nyanda's digital-TV signal plan | accessdate=2010-11-26}}</ref><ref>{{cite web | url=http://mybroadband.co.za/news/broadcasting/17491-DVB--chosen-digital-standard.html | title=DVB-T2 chosen as digital TV standard | accessdate=2011-01-03}}</ref>
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| * {{flag|Tunisia}} (experimental)
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| {{Multicol-end}}
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| ==See also==
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| | |
| * [[ATSC Standards|ATSC]] (Advanced Television Systems Committee, North American Standard)
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| * [[Digital Audio Broadcasting]] (low bitrate video suitable for moving receivers)
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| * [[Digital Video Broadcasting]] (technical standards underpinning DVB-T)
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| * [[DTV channel protection ratios]]
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| * [[DVB over IP]]
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| * [[DVB-T2]]
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| * [[Digital terrestrial television]]
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| * [[DMB-T]] - Digital Multimedia Broadcast-Terrestrial
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| * [[Interactive television]]
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| * [[ISDB]] - Integrated Services Digital Broadcasting
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| ** [[ISDB-T International]]
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| * [[Multimedia Home Platform]] (standard to deliver interactive TV applications over DVB)
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| * [[Orthogonal frequency-division multiplexing#OFDM system comparison table|OFDM system comparison table]]
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| * [[Personal video recorder]]
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| * [[Spectral efficiency#Comparison table|Spectral efficiency comparison table]]
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| * [[Teletext]]
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| ==Notes==
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| {{Reflist|33em}}
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| ==References==
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| * [[ETSI]] Standard: EN 300 744 V1.5.1, ''Digital Video Broadcasting (DVB); Framing structure, channel coding and modulation for digital terrestrial television'', available at [http://pda.etsi.org/pda/queryform.asp ETSI Publications Download Area] (This will open ETSI document search engine, to find the latest version of the document enter a search string; free registration is required to download PDF.)
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| ==External links==
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| {{Commons category|DVB-T}}
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| * [http://www.dvb.org/ Website of the DVB Project]
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| * [http://www.digitag.org/ DigiTAG website]
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| * [http://www.ofcom.org.uk/consult/condocs/dttfuture/ OFCOM DTT future]
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| * [http://www.bbc.co.uk/digital/index.shtml BBC - Digital - Homepage]
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| * [http://bellard.org/dvbt/ DVB-T broadcasting with Linux]
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| {{Wireless video}}
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| {{Video formats}}
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| {{Telecommunications}}
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| {{DEFAULTSORT:Dvb-T}}
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| [[Category:Digital Video Broadcasting]]
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| [[Category:Video formats]]
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