1、 ETSI EN 3Digital VidFrame structure cfor a second television broEUROPEAN STANDARD 302 755 V1.4.1 (2015ideo Broadcasting (DVB); e channel coding and modulad generation digital terrestrialroadcasting system (DVB-T2)15-07) lation ial 2) ETSI ETSI EN 302 755 V1.4.1 (2015-07) 2Reference REN/JTC-DVB-349
2、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 but non lucratif enregistre la Sous-Prfecture de Grasse
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9、I EN 302 755 V1.4.1 (2015-07) 3Contents Intellectual Property Rights 8g3Foreword . 8g3Modal verbs terminology 8g31 Scope 9g32 References 9g32.1 Normative references . 9g32.2 Informative references 9g33 Definitions, symbols and abbreviations . 10g33.1 Definitions 10g33.2 Symbols 13g33.3 Abbreviations
10、 . 17g34 DVB-T2 System architecture . 19g34.1 System overview 19g34.2 System architecture 20g34.3 Target performance 23g35 Input processing . 23g35.1 Mode adaptation . 23g35.1.0 Overview 23g35.1.1 Input Formats 23g35.1.2 Input Interface. 24g35.1.3 Input Stream Synchronization. 25g35.1.4 Compensating
11、 Delay for Transport Streams . 25g35.1.5 Null Packet Deletion (optional, for TS only, NM and HEM) . 25g35.1.6 CRC-8 encoding (for GFPS and TS, NM only) 26g35.1.7 Baseband Header (BBHEADER) insertion 26g35.1.8 Mode adaptation sub-system output stream formats . 28g35.2 Stream adaptation . 31g35.2.0 Ov
12、erview 31g35.2.1 Scheduler 32g35.2.2 Padding . 32g35.2.3 Use of the padding field for in-band signalling 32g35.2.3.0 Types and format 32g35.2.3.1 In-band type A 33g35.2.3.2 In-band type B . 35g35.2.4 BB scrambling 36g36 Bit-interleaved coding and modulation 37g36.1 FEC encoding . 37g36.1.0 Overview
13、37g36.1.1 Outer encoding (BCH) 38g36.1.2 Inner encoding (LDPC) 40g36.1.2.0 Overview . 40g36.1.2.1 Inner coding for normal FECFRAME. 40g36.1.2.2 Inner coding for short FECFRAME 41g36.1.3 Bit Interleaver (for 16-QAM, 64-QAM and 256-QAM). 41g36.2 Mapping bits onto constellations 43g36.2.0 Overview 43g3
14、6.2.1 Bit to cell word de-multiplexer . 43g36.2.2 Cell word mapping into I/Q constellations . 46g36.3 Constellation Rotation and Cyclic Q Delay . 50g36.4 Cell Interleaver . 50g36.5 Time Interleaver . 52g36.5.0 Overview 52g36.5.1 Mapping of Interleaving Frames onto one or more T2-frames . 54g3ETSI ET
15、SI EN 302 755 V1.4.1 (2015-07) 46.5.2 Division of Interleaving frames into Time Interleaving Blocks 54g36.5.3 Interleaving of each TI-block 55g36.5.4 Using the three Time Interleaving options with sub-slicing . 57g36.5.5 PLPs for which Time Interleaving is not used 59g37 Generation, coding and modul
16、ation of Layer 1 signalling . 59g37.1 Introduction 59g37.2 L1 signalling data . 60g37.2.0 Overview 60g37.2.1 P1 Signalling data . 60g37.2.2 L1-Pre Signalling data 62g37.2.3 L1-post signalling data 66g37.2.3.0 Overview . 66g37.2.3.1 Configurable L1-post signalling 67g37.2.3.2 Dynamic L1-post signalli
17、ng 72g37.2.3.3 Repetition of L1-post dynamic data 73g37.2.3.4 L1-post extension field 74g37.2.3.4.0 Overview . 74g37.2.3.4.1 Padding L1-post extension blocks . 75g37.2.3.5 CRC for the L1-post signalling . 75g37.2.3.6 L1 padding 75g37.2.3.7 L1 bias balancing bits 75g37.3 Modulation and error correcti
18、on coding of the L1 data 76g37.3.1 Overview 76g37.3.1.1 Error correction coding and modulation of the L1-pre signalling . 76g37.3.1.2 Error correction coding and modulation of the L1-post signalling . 76g37.3.2 Scrambling and FEC Encoding . 78g37.3.2.1 Scrambling of L1-post information bits 78g37.3.
19、2.2 Zero padding of BCH information bits . 78g37.3.2.3 BCH encoding . 80g37.3.2.4 LDPC encoding . 80g37.3.2.5 Puncturing of LDPC parity bits . 80g37.3.2.6 Removal of zero padding bits 82g37.3.2.7 Bit interleaving for L1-post signalling 82g37.3.3 Mapping bits onto constellations 82g37.3.3.0 Overview
20、. 82g37.3.3.1 Demultiplexing of L1-post signalling . 83g37.3.3.2 Mapping into I/Q constellations 83g37.3.3.3 Modification of L1 signalling constellations by L1-ACE algorithm . 83g38 Frame Builder . 85g38.0 Overview 85g38.1 Frame structure . 85g38.2 Super-frame 86g38.3 T2-Frame 87g38.3.0 Overview 87g
21、38.3.1 Duration of the T2-Frame . 87g38.3.2 Capacity and structure of the T2-frame 88g38.3.3 Signalling of the T2-frame structure and PLPs . 90g38.3.4 Overview of the T2-frame mapping . 91g38.3.5 Mapping of L1 signalling information to P2 symbol(s) 91g38.3.6 Mapping the PLPs . 93g38.3.6.0 Overview .
22、 93g38.3.6.1 Allocating the cells of the Interleaving Frames to the T2-Frames 93g38.3.6.2 Addressing of OFDM cells . 94g38.3.6.3 Mapping the PLPs to the data cell addresses. 95g38.3.6.3.0 Overview . 95g38.3.6.3.1 Insertion of bias balancing cells 95g38.3.6.3.2 Mapping the Common and Type 1 PLPs . 97
23、g38.3.6.3.3 Mapping the Type 2 PLPs . 97g38.3.7 Auxiliary stream insertion 98g38.3.8 Dummy cell insertion 99g3ETSI ETSI EN 302 755 V1.4.1 (2015-07) 58.3.9 Insertion of unmodulated cells in the Frame Closing Symbol 99g38.4 Future Extension Frames (FEF) . 99g38.5 Frequency interleaver . 100g39 OFDM Ge
24、neration 105g39.0 Overview 105g39.1 MISO Processing 105g39.2 Pilot insertion . 106g39.2.1 Introduction. 106g39.2.2 Definition of the reference sequence 106g39.2.2.0 Overview . 106g39.2.2.1 Symbol level . 107g39.2.2.2 Frame level 108g39.2.3 Scattered pilot insertion 108g39.2.3.0 Overview . 108g39.2.3
25、.1 Locations of the scattered pilots 108g39.2.3.2 Amplitudes of the scattered pilots . 110g39.2.3.3 Modulation of the scattered pilots . 110g39.2.4 Continual pilot insertion . 110g39.2.4.0 Overview . 110g39.2.4.1 Locations of the continual pilots . 110g39.2.4.2 Locations of additional continual pilo
26、ts in extended carrier mode 111g39.2.4.3 Amplitudes of the Continual Pilots . 111g39.2.4.4 Modulation of the Continual Pilots . 111g39.2.5 Edge pilot insertion . 111g39.2.6 P2 pilot insertion . 111g39.2.6.1 Locations of the P2 pilots 111g39.2.6.2 Amplitudes of the P2 pilots . 111g39.2.6.3 Modulation
27、 of the P2 pilots . 112g39.2.7 Insertion of frame closing pilots . 112g39.2.7.0 Overview . 112g39.2.7.1 Locations of the frame closing pilots 112g39.2.7.2 Amplitudes of the frame closing pilots . 112g39.2.7.3 Modulation of the frame closing pilots . 113g39.2.8 Modification of the pilots for MISO . 1
28、13g39.3 Dummy tone reservation 114g39.4 Mapping of data cells to OFDM carriers 114g39.5 IFFT - OFDM Modulation . 115g39.6 PAPR Reduction 116g39.6.0 Overview 116g39.6.1 Active Constellation Extension. 117g39.6.2 PAPR reduction using tone reservation 119g39.6.2.0 Overview. 119g39.6.2.1 Algorithm of PA
29、PR reduction using tone reservation . 119g39.7 Guard interval insertion 121g39.8 P1 Symbol insertion . 121g39.8.1 P1 Symbol overview . 121g39.8.2 P1 Symbol description 121g39.8.2.0 Overview . 121g39.8.2.1 Carrier Distribution in P1 symbol . 123g39.8.2.2 Modulation of the Active Carriers in P1 . 123g
30、39.8.2.3 Boosting of the Active Carriers . 125g39.8.2.4 Generation of the time domain P1 signal 126g39.8.2.4.1 Generation of the main part of the P1 signal . 126g39.8.2.4.2 Frequency Shifted repetition in Guard Intervals 126g310 Spectrum characteristics . 126g3Annex A (normative): Addresses of parit
31、y bit accumulators for Nldpc= 64 800 . 129g3Annex B (normative): Addresses of parity bit accumulators for Nldpc= 16 200 . 136g3Annex C (normative): Additional Mode Adaptation tools . 139g3ETSI ETSI EN 302 755 V1.4.1 (2015-07) 6C.1 Input stream synchronizer 139g3C.1.0 ISSY definition and signalling .
32、 139g3C.1.1 Receiver Buffer Model . 141g3C.1.2 Requirements of input signal 144g3Annex D (normative): Splitting of input MPEG-2 TSs into the data PLPs and common PLP of a group of PLPs . 146g3D.1 Overview 146g3D.2 Splitting of input TS into a TSPS stream and a TSPSC stream . 147g3D.2.1 General . 147
33、g3D.2.2 Co-timed TS packets that are identical on all input TSs of the group before the split . 147g3D.2.3 Co-timed TS packets carrying Service Description Table (SDT) and not having the characteristic of category (1) 148g3D.2.4 Co-timed TS packets carrying Event Information Table (EIT) and not havi
34、ng the characteristic of category (1) 150g3D.2.4.0 Overview 150g3D.2.4.1 Required operations 150g3D.2.4.2 Conditions . 150g3D.3 Receiver Implementation Considerations. 152g3Annex E (informative): T2-frame structure for Time-Frequency Slicing 153g3E.1 General . 153g3E.2 T2-frame structure 154g3E.2.1
35、Duration and capacity of the T2-frame. 154g3E.2.2 Overall structure of the T2-frame . 154g3E.2.3 Structure of the Type-2 part of the T2-frame . 155g3E.2.4 Restrictions on frame structure to allow tuner switching time . 156g3E.2.5 Signalling of the dynamic parameters in a TFS configuration . 157g3E.2
36、.6 Indexing of RF channels . 157g3E.2.7 Mapping the PLPs 158g3E.2.7.0 Overview 158g3E.2.7.1 Mapping the Common and Type 1 PLPs 158g3E.2.7.2 Mapping the Type 2 PLPs 158g3E.2.7.2.0 Overview . 158g3E.2.7.2.1 Allocating the cells of the Interleaving Frame to the T2-Frames 159g3E.2.7.2.2 Size of the sub-
37、slices . 160g3E.2.7.2.3 Allocation of cell addresses to the sub-slices on RFstart160g3E.2.7.2.4 Allocation of cell addresses to the sub-slices on the other RF channels . 161g3E.2.7.2.5 Mapping the PLP cells to the allocated cell addresses 162g3E.2.8 Auxiliary streams and dummy cells . 162g3Annex F (
38、normative): Calculation of the CRC word . 163g3Annex G (normative): Locations of the continual pilots . 164g3Annex H (normative): Reserved carrier indices for PAPR reduction . 168g3Annex I (normative): T2-Lite 170g3I.1 Overview 170g3I.2 In-band signalling . 170g3I.3 FEC encoding for T2-Lite 170g3I.4
39、 Bit to cell word de-multiplexer 171g3I.5 Modulation limitations for T2-Lite 172g3I.6 T2-Lite L1-signalling . 172g3ETSI ETSI EN 302 755 V1.4.1 (2015-07) 7I.7 T2-Lite mode limitations 173g3I.7.0 Overview 173g3I.7.1 FFT size limitations 173g3I.7.2 Pilot pattern limitations 173g3I.7.3 Limitations on mo
40、de combinations 173g3I.8 T2-Lite time interleaver memory . 173g3I.9 T2-Lite signal structure 174g3I.10 T2-Lite PLP data rate limitations . 174g3I.11 T2-Lite receiver buffer model limitations 175g3Annex J (informative): Transport Stream regeneration and clock recovery using ISCR 176g3Annex K (informa
41、tive): Pilot patterns 177g3Annex L (informative): Allowable sub-slicing values . 185g3Annex M (informative): Bibliography . 187g3History 188g3ETSI ETSI EN 302 755 V1.4.1 (2015-07) 8Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to
42、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 avai
43、lable 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 00
44、0 314 (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), Comit Europen de Normalisation ELECtrote
45、chnique (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 inclu
46、ding 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
47、-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 The Digital Video Broadcastin
48、g Project (DVB) is an industry-led consortium of broadcasters, manufacturers, network operators, software developers, regulatory bodies, content owners and others committed to designing global standards for the delivery of digital television and data services. DVB fosters market driven solutions tha
49、t meet the needs and economic circumstances of broadcast industry stakeholders and consumers. DVB standards cover all aspects of digital television from transmission through interfacing, conditional access and interactivity for digital video, audio and data. The consortium came together in 1993 to provide global standardization, interoperability and future proof specifications. National transposition dates Date of adoption of this EN: 23 June 2015 Date of latest announcement of this EN (doa): 30 September 2015 Date of latest publication of new National Standard or endorse
