ETSI EN 302 755 V1.3.1 (2012-04)

Digital Video Broadcasting (DVB); Frame structure channel coding and modulation for a second generation digital terrestrial television broadcasting system (DVB-T2)

REN/JTC-DVB-308

Digitalna videoradiodifuzija (DVB) - Struktura okvirov, kodiranje kanalov in modulacija za drugo generacijo sistema digitalne prizemne televizijske radiodifuzije (DVB-T2)

Nov dodatek z opisom mešanega delovanja.

General Information

• Status: Published
• Publication Date: 12-Apr-2012
• Technical Committee: BROADCAS - EBU/CENELEC/ETSI on Broadcasting
• Current Stage: 12 - Completion
• Due Date: 02-Apr-2012
• Completion Date: 13-Apr-2012
• Ref Project: SIST EN 302 755 V1.3.1:2012 - Digital Video Broadcasting (DVB) - Frame structure channel coding and modulation for a second generation digital terrestrial television broadcasting system (DVB-T2)

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 drugo generacijo sistema digitalne prizemne televizijske radiodifuzije (DVB-T2)Digital Video Broadcasting (DVB) - Frame structure channel coding and modulation for a second generation digital terrestrial television broadcasting system (DVB-T2)33.170Televizijska in radijska difuzijaTelevision and radio broadcastingICS:Ta slovenski standard je istoveten z:EN 302 755 Version 1.3.1SIST EN 302 755 V1.3.1:2012en01-junij-2012SIST EN 302 755 V1.3.1:2012SLOVENSKI
STANDARD



SIST EN 302 755 V1.3.1:2012



ETSI EN 302 755 V1.3.1 (2012-04) Digital Video Broadcasting (DVB); Frame structure channel coding and modulation for a second generation digital terrestrial television broadcasting system (DVB-T2)
European Standard SIST EN 302 755 V1.3.1:2012



ETSI ETSI EN 302 755 V1.3.1 (2012-04) 2
Reference REN/JTC-DVB-308 Keywords audio, broadcasting, data, digital, DVB, MPEG, terrestrial, TV, video ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: [phone]
Fax: [phone]
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. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http://portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2012. © European Broadcasting Union 2012. All rights reserved.
DECTTM, PLUGTESTSTM, UMTSTM and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association. SIST EN 302 755 V1.3.1:2012



ETSI ETSI EN 302 755 V1.3.1 (2012-04) 3 Contents Intellectual Property Rights . 7 Foreword . 7 1 Scope . 8 2 References . 8 2.1 Normative references . 8 2.2 Informative references . 8 3 Definitions, symbols and abbreviations . 9 3.1 Definitions . 9 3.2 Symbols . 12 3.3 Abbreviations . 16 4 DVB-T2 System architecture . 18 4.1 System overview . 18 4.2 System architecture . 19 4.3 Target performance . 21 5 Input processing . 22 5.1 Mode adaptation . 22 5.1.1 Input Formats . 22 5.1.2 Input Interface . 23 5.1.3 Input Stream Synchronization (Optional) . 23 5.1.4 Compensating Delay for Transport Streams . 24 5.1.5 Null Packet Deletion (optional, for TS only, NM and HEM) . 24 5.1.6 CRC-8 encoding (for GFPS and TS, NM only) . 25 5.1.7 Baseband Header (BBHEADER) insertion . 25 5.1.8 Mode adaptation sub-system output stream formats . 26 5.2 Stream adaptation . 29 5.2.1 Scheduler . 30 5.2.2 Padding . 30 5.2.3 Use of the padding field for in-band signalling . 30 5.2.3.1 In-band type A . 31 5.2.3.2 In-band type B . 33 5.2.4 BB scrambling . 34 6 Bit-interleaved coding and modulation . 35 6.1 FEC encoding . 35 6.1.1 Outer encoding (BCH) . 36 6.1.2 Inner encoding (LDPC) . 38 6.1.2.1 Inner coding for normal FECFRAME. 38 6.1.2.2 Inner coding for short FECFRAME . 39 6.1.3 Bit Interleaver (for 16-QAM, 64-QAM and 256-QAM). 40 6.2 Mapping bits onto constellations . 41 6.2.1 Bit to cell word de-multiplexer . 42 6.2.2 Cell word mapping into I/Q constellations . 45 6.3 Constellation Rotation and Cyclic Q Delay . 50 6.4 Cell Interleaver . 50 6.5 Time Interleaver . 52 6.5.1 Mapping of Interleaving Frames onto one or more T2-frames . 54 6.5.2 Division of Interleaving frames into Time Interleaving Blocks. 54 6.5.3 Interleaving of each TI-block. 55 6.5.4 Using the three Time Interleaving options with sub-slicing . 57 6.5.5 PLPs for which Time Interleaving is not used . 59 7 Generation, coding and modulation of Layer 1 signalling . 59 7.1 Introduction . 59 7.2 L1 signalling data . 60 SIST EN 302 755 V1.3.1:2012



ETSI ETSI EN 302 755 V1.3.1 (2012-04) 4 7.2.1 P1 Signalling data . 60 7.2.2 L1-Pre Signalling data . 62 7.2.3 L1-post signalling data . 66 7.2.3.1 Configurable L1-post signalling . 67 7.2.3.2 Dynamic L1-post signalling . 72 7.2.3.3 Repetition of L1-post dynamic data . 74 7.2.3.4 L1-post extension field . 74 7.2.3.4.1 Padding L1-post extension blocks . 75 7.2.3.5 CRC for the L1-post signalling . 75 7.2.3.6 L1 padding . 75 7.2.3.7 L1 bias balancing bits. 75 7.3 Modulation and error correction coding of the L1 data . 76 7.3.1 Overview . 76 7.3.1.1 Error correction coding and modulation of the L1-pre signalling . 76 7.3.1.2 Error correction coding and modulation of the L1-post signalling . 76 7.3.2 Scrambling and FEC Encoding . 78 7.3.2.1 Scrambling of L1-post information bits . 78 7.3.2.2 Zero padding of BCH information bits . 78 7.3.2.3 BCH encoding . 80 7.3.2.4 LDPC encoding . 80 7.3.2.5 Puncturing of LDPC parity bits . 81 7.3.2.6 Removal of zero padding bits. 82 7.3.2.7 Bit interleaving for L1-post signalling . 82 7.3.3 Mapping bits onto constellations . 83 7.3.3.1 Demultiplexing of L1-post signalling . 83 7.3.3.2 Mapping into I/Q constellations . 83 7.3.3.3 Modification of L1 signalling constellations by L1-ACE algorithm . 83 8 Frame Builder . 85 8.1 Frame structure . 85 8.2 Super-frame . 86 8.3 T2-Frame . 87 8.3.1 Duration of the T2-Frame . 87 8.3.2 Capacity and structure of the T2-frame . 88 8.3.3 Signalling of the T2-frame structure and PLPs . 90 8.3.4 Overview of the T2-frame mapping . 91 8.3.5 Mapping of L1 signalling information to P2 symbol(s) . 91 8.3.6 Mapping the PLPs . 93 8.3.6.1 Allocating the cells of the Interleaving Frames to the T2-Frames . 93 8.3.6.2 Addressing of OFDM cells . 94 8.3.6.3 Mapping the PLPs to the data cell addresses. 95 8.3.6.3.1 Insertion of bias balancing cells . 95 8.3.6.3.2 Mapping the Common and Type 1 PLPs . 97 8.3.6.3.3 Mapping the Type 2 PLPs . 97 8.3.7 Auxiliary stream insertion . 98 8.3.8 Dummy cell insertion. 99 8.3.9 Insertion of unmodulated cells in the Frame Closing Symbol . 99 8.4 Future Extension Frames (FEF) . 99 8.5 Frequency interleaver . 100 9 OFDM Generation . 105 9.1 MISO Processing . 105 9.2 Pilot insertion . 106 9.2.1 Introduction. 106 9.2.2 Definition of the reference sequence . 106 9.2.2.1 Symbol level . 107 9.2.2.2 Frame level . 108 9.2.3 Scattered pilot insertion . 108 9.2.3.1 Locations of the scattered pilots . 108 9.2.3.2 Amplitudes of the scattered pilots . 110 9.2.3.3 Modulation of the scattered pilots . 110 9.2.4 Continual pilot insertion . 110 SIST EN 302 755 V1.3.1:2012



ETSI ETSI EN 302 755 V1.3.1 (2012-04) 5 9.2.4.1 Locations of the continual pilots . 110 9.2.4.2 Locations of additional continual pilots in extended carrier mode . 111 9.2.4.3 Amplitudes of the Continual Pilots . 111 9.2.4.4 Modulation of the Continual Pilots . 111 9.2.5 Edge pilot insertion . 111 9.2.6 P2 pilot insertion . 111 9.2.6.1 Locations of the P2 pilots . 111 9.2.6.2 Amplitudes of the P2 pilots . 111 9.2.6.3 Modulation of the P2 pilots . 112 9.2.7 Insertion of frame closing pilots . 112 9.2.7.1 Locations of the frame closing pilots . 112 9.2.7.2 Amplitudes of the frame closing pilots . 112 9.2.7.3 Modulation of the frame closing pilots . 113 9.2.8 Modification of the pilots for MISO . 113 9.3 Dummy tone reservation . 114 9.4 Mapping of data cells to OFDM carriers . 114 9.5 IFFT - OFDM Modulation . 115 9.6 PAPR Reduction . 116 9.6.1 Active Constellation Extension. 117 9.6.2 PAPR reduction using tone reservation . 118 9.6.2.1 Algorithm of PAPR reduction using tone reservation . 119 9.7 Guard interval insertion . 121 9.8 P1 Symbol insertion . 121 9.8.1 P1 Symbol overview . 121 9.8.2 P1 Symbol description . 121 9.8.2.1 Carrier Distribution in P1 symbol . 122 9.8.2.2 Modulation of the Active Carriers in P1 . 123 9.8.2.3 Boosting of the Active Carriers . 125 9.8.2.4 Generation of the time domain P1 signal . 126 9.8.2.4.1 Generation of the main part of the P1 signal . 126 9.8.2.4.2 Frequency Shifted repetition in Guard Intervals . 126 10 Spectrum characteristics . 126 Annex A (normative): Addresses of parity bit accumulators for Nldpc = 64 800 . 129 Annex B (normative): Addresses of parity bit accumulators for Nldpc = 16 200 . 136 Annex C (normative): Additional Mode Adaptation tools . 139 C.1 Input stream synchronizer . 139 C.1.1 Receiver Buffer Model . 141 C.1.2 Requirements of input signal . 143 Annex D (normative): Splitting of input MPEG-2 TSs into the data PLPs and common PLP of a group of PLPs . 145 D.1 Overview . 145 D.2 Splitting of input TS into a TSPS stream and a TSPSC stream . 146 D.2.1 General . 146 D.2.2 TS packets that are co-timed and identical on all input TSs of the group before the split. 147 D.2.3 TS packets carrying Service Description Table (SDT) and not having the characteristics of category (1) . 147 D.2.4 TS packets carrying Event Information Table (EIT) and not having the characteristics of category (1) . 149 D.2.4.1 Required operations . 149 D.2.4.2 Conditions . 149 D.3 Receiver Implementation Considerations. 151 Annex E (informative): T2-frame structure for Time-Frequency Slicing . 152 E.1 General . 152 E.2 T2-frame structure . 153 SIST EN 302 755 V1.3.1:2012



ETSI ETSI EN 302 755 V1.3.1 (2012-04) 6 E.2.1 Duration and capacity of the T2-frame. 153 E.2.2 Overall structure of the T2-frame . 153 E.2.3 Structure of the Type-2 part of the T2-frame . 154 E.2.4 Restrictions on frame structure to allow tuner switching time . 155 E.2.5 Signalling of the dynamic parameters in a TFS configuration . 156 E.2.6 Indexing of RF channels . 156 E.2.7 Mapping the PLPs . 157 E.2.7.1 Mapping the Common and Type 1 PLPs . 157 E.2.7.2 Mapping the Type 2 PLPs . 157 E.2.7.2.1 Allocating the cells of the Interleaving Frame to the T2-Frames . 157 E.2.7.2.2 Size of the sub-slices . 158 E.2.7.2.3 Allocation of cell addresses to the sub-slices on RFstart . 159 E.2.7.2.4 Allocation of cell addresses to the sub-slices on the other RF channels .
...