Final draft ETSI EN 300 744 V1.6.1 (2008-09) European Standard (Telecommunications series) Digital Video Broadcasting (DVB); Framing structure, channel coding and modulation for digital terrestrial television European Broadcasting Union Union Européenne de Radio-Télévision EBU·UER 2 Final draft ETSI EN 300 744 V1.6.1 (2008-09) Reference REN/JTC-DVB-234 Keywords audio, broadcasting, data, digital, DVB, MPEG, terrestrial, TV, video ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88 Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. 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ETSI 3 Final draft ETSI EN 300 744 V1.6.1 (2008-09) Contents Intellectual Property Rights ................................................................................................................................ 5 Foreword ............................................................................................................................................................. 5 1 Scope ........................................................................................................................................................ 6 2 References ................................................................................................................................................ 6 2.1 Normative references ......................................................................................................................................... 7 2.2 Informative references ........................................................................................................................................ 7 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 ........................................................................................................................................................ 11 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............................................................................................................ 12 4.3.3 Inner coding ................................................................................................................................................ 14 4.3.4 Inner interleaving ........................................................................................................................................ 15 4.3.4.1 Bit-wise interleaving ............................................................................................................................. 15 4.3.4.2 Symbol interleaver ................................................................................................................................ 19 4.3.5 Signal constellations and mapping .............................................................................................................. 21 4.4 OFDM frame structure ..................................................................................................................................... 25 4.5 Reference signals .............................................................................................................................................. 27 4.5.1 Functions and derivation ............................................................................................................................. 27 4.5.2 Definition of reference sequence ................................................................................................................ 27 4.5.3 Location of scattered pilot cells .................................................................................................................. 28 4.5.4 Location of continual pilot carriers ............................................................................................................. 29 4.5.5 Amplitudes of all reference information ..................................................................................................... 29 4.6 Transmission Parameter Signalling (TPS) ....................................................................................................... 29 4.6.1 Scope of the TPS ........................................................................................................................................ 30 4.6.2 TPS transmission format ............................................................................................................................. 31 4.6.2.1 Initialization .......................................................................................................................................... 31 4.6.2.2 Synchronization .................................................................................................................................... 31 4.6.2.3 TPS length indicator .............................................................................................................................. 31 4.6.2.4 Frame number ....................................................................................................................................... 32 4.6.2.5 Constellation ......................................................................................................................................... 32 4.6.2.6 Hierarchy information ........................................................................................................................... 32 4.6.2.7 Code rates .............................................................................................................................................. 32 4.6.2.8 Guard Intervals ...................................................................................................................................... 33 4.6.2.9 Transmission mode ............................................................................................................................... 33 4.6.2.10 Cell identifier ........................................................................................................................................ 33 4.6.2.11 Error protection of TPS ......................................................................................................................... 34 4.6.3 TPS modulation .......................................................................................................................................... 34 4.7 Number of RS-packets per OFDM super-frame ............................................................................................... 34 4.8 Spectrum characteristics and spectrum mask ................................................................................................... 35 4.8.1 Spectrum characteristics ............................................................................................................................. 35 4.8.2 Out-of-band spectrum mask (for 8 MHz channels) ...................................................................................