SIST EN 300 744 V1.6.2:2016
(Main)Digital Video Broadcasting (DVB) - Framing structure, channel coding and modulation for digital terrestrial television
Digital Video Broadcasting (DVB) - Framing structure, channel coding and modulation for digital terrestrial television
The present document describes a baseline transmission system for digital terrestrial TeleVision (TV) broadcasting. It
specifies the channel coding/modulation system intended for digital multi-programme LDTV/SDTV/EDTV/HDTV
terrestrial services.
The scope is as follows:
- it gives a general description of the Baseline System for digital terrestrial TV;
- it identifies the global performance requirements and features of the Baseline System, in order to meet the
service quality targets;
- it specifies the digitally modulated signal in order to allow compatibility between pieces of equipment
developed by different manufacturers. This is achieved by describing in detail the signal processing at the
modulator side, while the processing at the receiver side is left open to different implementation solutions.
However, it is necessary in this text to refer to certain aspects of reception.
In order to address Handheld terminals (DVB-H) in annexes are provided:
- an additional 4K Mode offering supplementary options for network planning (annex F);
- an optional in-depth inner interleaver, to mitigate the effects of the high level of man-made noise affecting the
reception of DVB-H services (annex F);
- an extension of the Transmission Parameter Signalling (TPS) information for signalling DVB-H Services
(annex F);
- the transmission parameters to operate the transmission system in 5 MHz channel bandwidth, even outside of
the traditional broadcasting bands (annex G).
Digitalna videoradiodifuzija (DVB) - Struktura okvirov, kodiranje kanalov in modulacija za digitalno prizemno televizijo
Ta dokument opisuje osnovni prenosni sistem za digitalno prizemno televizijsko (TV) radiodifuzijo. Določa sistem za kodiranje/modulacijo kanalov, namenjen za digitalne večprogramske prizemne storitve LDTV/SDTV/EDTV/HDTV.
Obseg je naslednji:
– podaja splošen opis osnovnega sistema za digitalno prizemno televizijo;
– opredeljuje zahteve glede celotne zmogljivosti osnovnega sistema in njegove funkcije zaradi izpolnjevanja ciljev kakovosti storitve;
– določa digitalno moduliran signal, s čimer omogoča združljivost med deli opreme različnih proizvajalcev. To se doseže s podrobnim opisom obdelave signala na strani modulatorja, medtem ko je obdelava na strani sprejemnika mogoča z različnimi rešitvami.
Vendar je treba v okviru tega besedila nasloviti tudi določene vidike sprejemanja.
Zaradi obravnave ročnih terminalov (DVB-H) je v dodatkih predstavljeno naslednje:
– dodatni način 4K, ki ponuja dodatne možnosti za načrtovanje omrežij (dodatek F);
– izbirno poglobljeno notranje prepletanje za zmanjšanje učinkov visoke ravni hrupa, ki ga povzroča človek in ki vpliva na sprejemanje storitev DVB-H (dodatek F);
– razširitev obsega informacij signalizacije prenosnega parametra (TPS) za signalizacijo storitev DVB-H (dodatek F);
– prenosni parametri za upravljanje prenosnega sistema s pasovno širino kanala 5 MHz tudi zunaj običajnih oddajnih pasov (dodatek G).
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digitalna videoradiodifuzija (DVB) - Struktura okvirov, kodiranje kanalov in modulacija za digitalno prizemno televizijoDigital Video Broadcasting (DVB) - Framing structure, channel coding and modulation for digital terrestrial television33.170Televizijska in radijska difuzijaTelevision and radio broadcastingICS:Ta slovenski standard je istoveten z:EN 300 744 V1.6.2SIST EN 300 744 V1.6.2:2016en01-april-2016SIST EN 300 744 V1.6.2:2016SLOVENSKI
STANDARD
SIST EN 300 744 V1.6.2:2016
ETSI EN 300 744 V1.6.2 (2015-10) Digital Video Broadcasting (DVB); Framing structure, channel coding and modulation for digital terrestrial television
EUROPEAN STANDARD SIST EN 300 744 V1.6.2:2016
ETSI ETSI EN 300 744 V1.6.2 (2015-10) 2
Reference REN/JTC-DVB-362 Keywords audio, broadcasting, data, digital, DVB, MPEG, terrestrial, TV, video ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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ETSI ETSI EN 300 744 V1.6.2 (2015-10) 3 Contents Intellectual Property Rights . 5 Foreword . 5 Modal verbs terminology . 5 1 Scope . 6 2 References . 6 2.1 Normative references . 6 2.2 Informative references . 6 3 Definitions, symbols and abbreviations . 7 3.1 Definitions . 7 3.2 Symbols . 7 3.3 Abbreviations . 8 4 Baseline system . 9 4.1 General considerations . 9 4.2 Interfacing . 10 4.3 Channel coding and modulation . 11 4.3.1 Transport multiplex adaptation and randomization for energy dispersal . 11 4.3.2 Outer coding and outer interleaving. 11 4.3.3 Inner coding . 13 4.3.4 Inner interleaving . 14 4.3.4.0 General . 14 4.3.4.1 Bit-wise interleaving . 14 4.3.4.2 Symbol interleaver . 18 4.3.5 Signal constellations and mapping . 20 4.4 OFDM frame structure . 24 4.5 Reference signals . 26 4.5.0 General . 26 4.5.1 Functions and derivation . 26 4.5.2 Definition of reference sequence . 26 4.5.3 Location of scattered pilot cells . 27 4.5.4 Location of continual pilot carriers . 28 4.5.5 Amplitudes of all reference information . 28 4.6 Transmission Parameter Signalling (TPS) . 28 4.6.0 General . 28 4.6.1 Scope of the TPS . 29 4.6.2 TPS transmission format . 30 4.6.2.0 General . 30 4.6.2.1 Initialization . 30 4.6.2.2 Synchronization . 30 4.6.2.3 TPS length indicator . 30 4.6.2.4 Frame number . 31 4.6.2.5 Constellation . 31 4.6.2.6 Hierarchy information . 31 4.6.2.7 Code rates . 31 4.6.2.8 Guard Intervals . 32 4.6.2.9 Transmission mode . 32 4.6.2.10 Cell identifier . 32 4.6.2.11 Error protection of TPS . 33 4.6.3 TPS modulation . 33 4.7 Number of RS-packets per OFDM super-frame . 33 4.8 Spectrum characteristics and spectrum mask . 34 4.8.1 Spectrum characteristics . 34 4.8.2 Out-of-band spectrum mask (for 8 MHz channels) . 35 4.8.3 Centre frequency of RF signal (for 8 MHz UHF channels) . 38 Annex A (informative): Simulated system performance for 8 MHz channels . 39 SIST EN 300 744 V1.6.2:2016
ETSI ETSI EN 300 744 V1.6.2 (2015-10) 4 Annex B (informative): Definition of P1 and F1 . 42 Annex C (informative): Interleaving example . 44 Annex D (informative): Guidelines to implementation of the emitted signal . 45 D.0 General . 45 D.1 Use of the FFT . 45 D.2 Choice of "baseband" centre frequency . 45 D.3 Other potential difficulties . 46 Annex E (normative): Values for 6 MHz and 7 MHz channels . 47 Annex F (normative): Additional features for DVB Handheld terminals (DVB-H) . 50 F.0 General . 50 F.1 General Considerations . 50 F.2 Additional features overview . 50 F.3 Additional baseline features . 51 F.3.0 General . 51 F.3.1 Channel coding and modulation . 51 F.3.1.0 General . 51 F.3.1.1 Inner interleaving . 51 F.3.1.1.0 General . 51 F.3.1.1.1 Bit-wise interleaving . 52 F.3.1.1.2 Symbol interleaver . 52 F.3.1.1.2.0 General . 52 F.3.1.1.2.1 Native symbol interleaver . 52 F.3.1.1.2.2 In-depth symbol interleavers . 53 F.3.1.1.2.3 Permutation function . 53 F.3.2 OFDM frame structure . 54 F.3.3 Reference signals . 56 F.3.3.0 General . 56 F.3.3.1 Location of continual pilot carriers . 56 F.3.4 Transmission Parameter Signalling (TPS) . 56 F.3.4.0 General . 56 F.3.4.1 Scope of the TPS . 56 F.3.4.2 TPS transmission format . 56 F.3.4.2.0 General . 56 F.3.4.2.1 TPS length indicator . 57 F.3.4.2.2 Hierarchy and Interleaving information . 57 F.3.4.2.3 Transmission mode . 57 F.3.4.2.4 DVB-H signalling . 57 F.3.5 Transmission Capacities . 58 F.3.5.0 General . 58 F.3.5.1 Number of RS-packets per Super Frame . 58 F.3.5.2 Useful Bitrate . 58 F.3.6 Spectrum characteristics and spectrum mask . 60 F.3.6.0 General . 60 F.3.6.1 Spectrum characteristics . 60 Annex G (normative): 5 MHz channel bandwidth operation . 61 History . 64
SIST EN 300 744 V1.6.2:2016
ETSI ETSI EN 300 744 V1.6.2 (2015-10) 5 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http://ipr.etsi.org). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This European Standard (EN) has been produced by Joint Technical Committee (JTC) Broadcast of the European Broadcasting Union (EBU), Comité Européen de Normalisation ELECtrotechnique (CENELEC) and the European Telecommunications Standards Institute (ETSI). NOTE: The EBU/ETSI JTC Broadcast was established in 1990 to co-ordinate the drafting of standards in the specific field of broadcasting and related fields. Since 1995 the JTC Broadcast became a tripartite body by including in the Memorandum of Understanding also CENELEC, which is responsible for the standardization of radio and television receivers. The EBU is a professional association of broadcasting organizations whose work includes the co-ordination of its members' activities in the technical, legal, programme-making and programme-exchange domains. The EBU has active members in about 60 countries in the European broadcasting area; its headquarters is in Geneva. European Broadcasting Union CH-1218 GRAND SACONNEX (Geneva) Switzerland Tel: +41 22 717 21 11 Fax: +41 22 717 24 81
Founded in September 1993, the DVB Project is a market-led consortium of public and private sector organizations in the television industry. Its aim is to establish the framework for the introduction of MPEG-2 based digital television services. Now comprising over 200 organizations from more than 25 countries around the world, DVB fosters market-led systems, which meet the real needs, and economic circumstances, of the consumer electronics and the broadcast industry.
National transposition dates Date of latest announcement of this EN (doa): 31 January 2016 Date of latest publication of new National Standard or endorsement of this EN (dop/e): 31 July 2016 Date of withdrawal of any conflicting National Standard (dow): 31 July 2016
Modal verbs terminology In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and "cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). "must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation. SIST EN 300 744 V1.6.2:2016
ETSI ETSI EN 300 744 V1.6.2 (2015-10) 6 1 Scope The present document describes a baseline transmission system for digital terrestrial TeleVision (TV) broadcasting. It specifies the channel coding/modulation system intended for digital multi-programme LDTV/SDTV/EDTV/HDTV terrestrial services. The scope is as follows:
- it gives a general description of the Baseline System for digital terrestrial TV; - it identifies the global performance requirements and features of the Baseline System, in order to meet the service quality targets; - it specifies the digitally modulated signal in order to allow compatibility between pieces of equipment developed by different manufacturers. This is achieved by describing in detail the signal processing at the modulator side, while the processing at the receiver side is left open to different implementation solutions. However, it is necessary in this text to refer to certain aspects of reception. In order to address Handheld terminals (DVB-H) in annexes are provided: - an additional 4K Mode offering supplementary options for network planning (annex F); - an optional in-depth inner interleaver, to mitigate the effects of the high level of man-made noise affecting the reception of DVB-H services (annex F); - an extension of the Transmission Parameter Signalling (TPS) information for signalling DVB-H Services (annex F); - the transmission parameters to operate the transmission system in 5 MHz channel bandwidth, even outside of the traditional broadcasting bands (annex G). 2 References 2.1 Normative references References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at http://docbox.etsi.org/Reference. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. The following referenced documents are necessary for the application of the present document. [1] ISO/IEC 13818 (Parts 1 to 3): "Information technology - Generic coding of moving pictures and associated audio information". [2] ETSI EN 300 421: "Digital Video Broadcasting (DVB); Framing structure, channel coding and modulation for 11/12 GHz satellite services". [3] ETSI EN 300 429: "Digital Video Broadcasting (DVB); Framing structure, channel coding and modulation for cable systems". 2.2 Informative references References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. SIST EN 300 744 V1.6.2:2016
ETSI ETSI EN 300 744 V1.6.2 (2015-10) 7 NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. [i.1] Peterson and Weldon: "Error correcting codes", second edition, MIT Press, 1972. 3 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: constraint length: number of delay elements +1 in the convolutional coder 3.2 Symbols For the purposes of the present document, the following symbols apply: A(e) output vector from inner bit interleaver e ae,w bit number w of inner bit interleaver output stream e α constellation ratio which determines the QAM constellation for the modulation for hierarchical transmission B(e) input vector to inner bit interleaver e be,w bit number w of inner bit interleaver input steam e be,do output bit number do of demultiplexed bit stream number e of the inner interleaver demultiplexer bi bit number i of the cell identifier cm,l,k complex cell for frame m in OFDM symbol l at carrier k C'k Complex modulation for a reference signal at carrier k C'l,k Complex modulation for a TPS signal at carrier k in symbol l C/N Carrier-to-Noise ratio Δ time duration of the guard interval dfree convolutional code free distance fc centre frequency of the emitted signal G1, G2 convolutional code Generator polynomials g(x) Reed-Solomon code generator polynomial h(x) BCH code generator polynomial H(q) inner symbol interleaver permutation He(w) inner bit interleaver permutation
i priority stream index I Interleaving depth of the outer convolutional interleaver I0,I1,I2,I3,I4,I5 inner Interleavers j branch index of the outer interleaver k carrier number index in each OFDM symbol
K number of active carriers in the OFDM symbol Kmin, Kmax
carrier number of the lower and largest active carrier respectively in the OFDM signal l OFDM symbol number index in an OFDM frame m OFDM frame number index m' OFDM super-frame number index M convolutional interleaver branch depth for j = 1, M = N/I n transport stream sync byte number N length of error protected packet in bytes Nmax
inner symbol interleaver block size p scattered pilot insertion index p(x) RS code field generator polynomial Pk(f) Power spectral density for carrier k P(n) interleaving Pattern of the inner symbol interleaver SIST EN 300 744 V1.6.2:2016
ETSI ETSI EN 300 744 V1.6.2 (2015-10) 8 ri code rate for priority level i si TPS bit index t number of bytes which can be corrected by the Reed-Solomon decoder T elementary Time period TS duration of an OFDM symbol TF Time duration of a frame TU Time duration of the useful (orthogonal) part of a symbol, without the guard interval u bit numbering index v number of bits per modulation symbol wk value of reference PRBS sequence applicable to carrier k xdi input bit number di to the inner interleaver demultiplexer x'di high priority input bit number di to the inner interleaver demultiplexer x"di low priority input bit number di to the inner interleaver demultiplexer Y output vector from inner symbol interleaver Y' intermediate vector of inner symbol interleaver yq bit number q of output from inner symbol interleaver y'q bit number q of intermediate vector of inner symbol interleaver z complex modulation symbol * complex conjugate 3.3 Abbreviations For the purposes of the present document, the following abbreviations apply: ACI Adjacent Channel Interference AWGN Additive White Gaussian Noise BCH Bose - Chaudhuri - Hocquenghem code BER Bit Error Ratio CCI Co-Channel Interference DBPSK Differential Binary Phase Shift Keying DC Direct Current DFT Discrete Fourier Transform DVB Digital Video Broadcasting DVB-H DVB-Handheld DVB-T DVB-Terrestrial EDTV Enhanced Definition TeleVision FFT Fast Fourier Transform FIFO First-In, First-Out shift register HDTV High Definition TeleVision
HP High Priority bit stream IFFT Inverse Fast Fourier Transform LDTV Limited Definition TeleVision LP Low Priority bit stream MPEG Moving Picture Experts Group MSB Most Significant Bit MUX MUltipleX NICAM Near-Instantaneous Companded Audio Multiplex OFDM Orthogonal Frequency Division Multiplexing PAL Phase Alternating Line PRBS Pseudo-Random Binary Sequence PSK Phase-Shift Keying QAM Quadrature Amplitude Modulation QEF Quasi Error Free QPSK Quaternary Phase Shift Keying RF Radio Frequency RS Reed-Solomon SDTV Standard Definition TeleVision SECAM Système Sequentiel Couleur A Mémoire SFN Single Frequency Network SIST EN 300 744 V1.6.2:2016
ETSI ETSI EN 300 744 V1.6.2 (2015-10) 9 TPS Transmission Parameter Signalling TV TeleVision UHF Ultra-High Frequency VHF Very-High Frequency 4 Baseline system 4.1 General considerations The system is defined as the functional block of equipment performing the adaptation of the baseband TV signals from the output of the MPEG-2 transport multiple
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