Digital Video Broadcasting (DVB); Frame structure channel coding and modulation for a second generation digital transmission system for cable systems (DVB-C2)

The present document describes a second generation baseline transmission system for digital television broadcasting via
Hybrid Fibre Coax (HFC) cable networks and Master Antenna Television (MATV) installations. It specifies the channel
coding, modulation and lower layer signalling protocol system intended for the provision of digital television services
and generic data streams.
The scope is as follows:
• it gives a general description of the Baseline System for digital cable TV;
• it specifies the digital signal processing in order to establish compatibility between pieces of equipment
developed by different manufacturers. This is achieved by describing in detail the signal processing at the
transmitting side, while the processing at the receiving side is left open to individual implementations.
However, for the purpose of securing interoperability it is necessary in this text to refer to certain
implementation aspects of the receiving end.

Digitalna videoradiodifuzija (DVB) - Struktura okvirov pri kanalskem kodiranju in modulacija za drugo generacijo prenosnega sistema za kabelske sisteme (DVB-C2)

Ta dokument opisuje drugo generacijo osnovnega prenosnega sistema za digitalno televizijsko radiofuzijo prek kabelskih omrežij hibridnih optičnih zvez (HFC) in namestitve televizijske difuzije s skupno (difuzijsko) anteno (MATV). Določa sistem za kodiranje, modulacijo in satelitski sistem nižjih plasti, namenjen za omogočanje storitev digitalne televizije in splošnih podatkovnih tokov.
Obseg je naslednji:
• podaja splošen opis osnovnega sistema za digitalno kabelsko televizijo;
• določa obdelavo digitalnega signala, s čimer vzpostavi združljivost med deli opreme različnih proizvajalcev. To se doseže s podrobnim opisom obdelave signala na strani prenosa, medtem ko je obdelava na strani sprejemnika mogoča z različnimi rešitvami. Vendar je za namen zagotovitve interoperabilnosti v tem besedilu treba navesti določene vidike uvedbe na strani sprejemnika.

General Information

Status
Published
Publication Date
05-Jan-2016
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
04-Nov-2015
Due Date
09-Jan-2016
Completion Date
06-Jan-2016

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digitalna videoradiodifuzija (DVB) - Struktura okvirov pri kanalskem kodiranju in modulacija za drugo generacijo prenosnega sistema za kabelske sisteme (DVB-C2)Digital Video Broadcasting (DVB); Frame structure channel coding and modulation for a second generation digital transmission system for cable systems (DVB-C2)33.170Televizijska in radijska difuzijaTelevision and radio broadcastingICS:Ta slovenski standard je istoveten z:EN 302 769 V1.3.1SIST EN 302 769 V1.3.1:2016en,fr,de01-februar-2016SIST EN 302 769 V1.3.1:2016SLOVENSKI
STANDARD



SIST EN 302 769 V1.3.1:2016



ETSI EN 302 769 V1.3.1 (2015-10) Digital Video Broadcasting (DVB); Frame structure channel coding and modulation for a second generation digital transmission system for cable systems (DVB-C2)
EUROPEAN STANDARD SIST EN 302 769 V1.3.1:2016



ETSI ETSI EN 302 769 V1.3.1 (2015-10) 2
Reference REN/JTC-DVB-353 Keywords audio, broadcasting, cable, data, digital, DVB, MPEG, 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 The present document can be downloaded from: http://www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of the Portable Document Format (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: https://portal.etsi.org/People/CommiteeSupportStaff.aspx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of ETSI. The content of the PDF version shall not be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2015. © European Broadcasting Union 2015. 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 302 769 V1.3.1:2016



ETSI ETSI EN 302 769 V1.3.1 (2015-10) 3 Contents Intellectual Property Rights . 6 Foreword . 6 Modal verbs terminology . 6 Introduction . 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 . 11 3.3 Abbreviations . 14 4 DVB-C2 System architecture . 16 4.1 System overview . 16 4.2 System architecture . 16 4.3 Target performance . 19 5 Input processing . 19 5.1 Mode adaptation . 19 5.1.0 Overview . 19 5.1.1 Input Formats . 20 5.1.2 Input Interface . 20 5.1.3 Input Stream Synchronization (Optional) . 21 5.1.4 Null Packet Deletion (optional, for TS only, NM and HEM) . 21 5.1.5 CRC-8 encoding (for GFPS and TS, NM only) . 22 5.1.6 Baseband Header (BBHeader) insertion . 22 5.1.7 Mode adaptation sub-system output stream formats . 24 5.2 Stream adaptation . 27 5.2.0 Overview . 27 5.2.1 Scheduler . 27 5.2.2 Padding . 27 5.2.3 BB scrambling . 27 6 Bit-interleaved coding and modulation . 28 6.1 FEC encoding . 28 6.1.0 Overview . 28 6.1.1 Outer encoding (BCH) . 29 6.1.2 Inner encoding (LDPC) . 30 6.1.2.0 Overview . 30 6.1.2.1 Inner coding for normal FECFrame . 30 6.1.2.2 Inner coding for short FECFrame . 32 6.1.3 Bit Interleaver . 32 6.2 Mapping bits onto constellations . 34 6.2.0 Overview . 34 6.2.1 Bit to cell word demultiplexer . 35 6.2.2 Cell word mapping into I/Q constellations . 38 7 Data Slice Packet Generation . 45 7.0 Overview . 45 7.1 Data Slice Packets for Data Slice Type 1 . 45 7.2 Data Slice Packets for Data Slice Type 2 . 45 7.2.0 Overview . 45 7.2.1 FECFrame header signalling data . 46 7.2.2 Coding of the FECFrame header . 47 7.2.2.0 Overview . 47 SIST EN 302 769 V1.3.1:2016



ETSI ETSI EN 302 769 V1.3.1 (2015-10) 4 7.2.2.1 Error Coding . 48 7.2.2.2 Cyclic Delay . 48 7.2.2.3 Scrambling of the lower branch . 48 7.2.3 Mapping onto QAM constellations . 49 7.2.3.0 Overview . 49 7.2.3.1 Robust FECFrame header . 49 7.2.3.2 High efficiency FECFrame header . 49 7.2.4 Mapping of the XFECFrame cells . 49 7.2.5 Length of the Data Slice Packet for Data Slice Type 2 . 49 7.2.6 Stuffing Data Slice Packets . 50 8 Generation, coding and modulation of Layer 1 part 2 signalling . 51 8.1 Overview . 51 8.2 Preamble Header . 51 8.3 L1 signalling part 2 data . 53 8.3.0 Overview . 53 8.3.1 L1 block padding . 58 8.3.2 CRC for the L1 signalling part 2. 58 8.3.3 L1 padding . 58 8.4 Modulation and error correction coding of the L1 part 2 data . 59 8.4.1 Overview . 59 8.4.2 Parameters for FEC encoding of L1 part 2 data . 61 8.4.3 FEC Encoding . 63 8.4.3.1 Zero padding of BCH information bits . 63 8.4.3.2 BCH encoding . 64 8.4.3.3 LDPC encoding . 64 8.4.3.4 Puncturing of LDPC parity bits . 65 8.4.3.5 Removal of zero padding bits. 65 8.4.3.6 Bit interleaving for L1 signalling part 2 . 66 8.4.4 Mapping bits onto constellations . 66 8.4.4.0 Overview . 66 8.4.4.1 Demultiplexing of L1 signalling part 2 . 66 8.4.4.2 Mapping onto QAM constellations . 67 8.5 Time interleaving of L1 signalling part 2 data . 67 9 Frame Builder . 69 9.0 Introduction . 69 9.1 C2 Frame structure . 69 9.1.0 Overview . 69 9.1.1 Duration of the C2 Frame . 70 9.2 Pilot Reference Sequence . 70 9.2.1 Data Scrambling Sequence . 70 9.2.2 Pilot Scrambling Sequence . 70 9.2.3 Pilot Reference Sequence . 71 9.3 Preamble Symbol . 71 9.3.1 Preamble Symbol overview . 71 9.3.2 Frequency Interleaving . 72 9.3.3 Pilot insertion . 72 9.3.3.0 Overview . 72 9.3.3.1 Locations of the preamble pilots . 73 9.3.3.2 Amplitude and modulation of the preamble pilots . 73 9.3.4 Mapping and scrambling of the signalling data . 73 9.3.5 Notches within Preamble Symbols . 74 9.3.5.0 Overview . 74 9.3.5.1 Narrowband Notches . 74 9.3.5.2 Broadband Notches . 74 9.4 Data Slice generation . 75 9.4.0 Overview . 75 9.4.1 Location of Data Slices . 75 9.4.1.1 Start and end OFDM carrier of Data Slices . 75 9.4.1.2 Maximum width of Data Slices . 75 9.4.1.3 Minimum width of Data Slices . 75 SIST EN 302 769 V1.3.1:2016



ETSI ETSI EN 302 769 V1.3.1 (2015-10) 5 9.4.1.4 Notches within Data Slices . 75 9.4.2 Number of payload cells in Data Slice. 76 9.4.3 Mapping of the Data Slice Packets . 76 9.4.4 Time Interleaving . 76 9.4.5 Frequency Interleaving . 80 9.5 Stuffing Data Slices . 81 9.6 Pilot Insertion . 81 9.6.1 Introduction. 81 9.6.2 Scattered pilot insertion . 82 9.6.2.0 Overview . 82 9.6.2.1 Locations of the scattered pilots . 82 9.6.2.2 Amplitudes of the scattered pilots . 82 9.6.2.3 Modulation of the scattered pilots . 82 9.6.3 Continual pilot insertion . 83 9.6.3.0 Overview . 83 9.6.3.1 Locations of the continual pilots . 83 9.6.3.2 Amplitudes of the Continual Pilots . 83 9.6.3.3 Modulation of the Continual Pilots . 83 9.6.4 Edge pilot insertion . 83 9.6.4.0 Overview . 83 9.6.4.1 Locations of the edge pilots . 83 9.6.4.2 Amplitudes of the Edge Pilots . 84 9.6.4.3 Modulation of the Edge Pilots . 84 9.7 Dummy carrier reservation . 85 10 OFDM generation . 85 10.0 Introduction . 85 10.1 IFFT - OFDM Modulation . 85 10.2 Guard interval insertion . 87 10.3 Spectrum characteristics . 87 Annex A (normative): Addresses of parity bit accumulators for Nldpc = 64 800 . 89 Annex B (normative): Addresses of parity bit accumulators for Nldpc = 16 200 . 95 Annex C (normative): Input stream synchronizer . 97 Annex D (normative): Input Remultiplexing Subsystem: Splitting of input MPEG-2 Transport Streams into Data PLPs, generation of a Common PLP of a group of PLPs and insertion of Null Packets into Transport Streams . 99 D.1 Overview . 99 D.2 Splitting of a group of input TSs into TSPSs streams and a TSPSC stream . 100 D.2.1 General . 100 D.2.2 Extraction of the Common PLP from a group of TS . 100 D.2.3 Insertion of additional Null Packets into TSPSs. 101 D.3 Receiver Implementation Considerations. 102 D.3.0 Introduction . 102 D.3.1 Recombination of TSPSS and TSPSC in a receiver . 102 Annex E (normative): Calculation of the CRC word . 104 Annex F (normative): Bundling of PLPs . 105 Annex G (informative): Transport Stream regeneration and clock recovery using ISCR . 107 Annex H (informative): Pilot patterns . 108 Annex I (informative): Bibliography . 111 History . 112
SIST EN 302 769 V1.3.1:2016



ETSI ETSI EN 302 769 V1.3.1 (2015-10) 6 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
...

ETSI EN 302 769 V1.3.1 (2015-10)






EUROPEAN STANDARD
Digital Video Broadcasting (DVB);
Frame structure channel coding and modulation
for a second generation digital transmission system
for cable systems (DVB-C2)

---------------------- Page: 1 ----------------------
2 ETSI EN 302 769 V1.3.1 (2015-10)



Reference
REN/JTC-DVB-353
Keywords
audio, broadcasting, cable, data, digital, DVB,
MPEG, 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
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the
print of the Portable Document Format (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:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2015.
© European Broadcasting Union 2015.
All rights reserved.

TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP 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.
ETSI

---------------------- Page: 2 ----------------------
3 ETSI EN 302 769 V1.3.1 (2015-10)
Contents
Intellectual Property Rights . 6
Foreword . 6
Modal verbs terminology . 6
Introduction . 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 . 11
3.3 Abbreviations . 14
4 DVB-C2 System architecture . 16
4.1 System overview . 16
4.2 System architecture . 16
4.3 Target performance . 19
5 Input processing . 19
5.1 Mode adaptation . 19
5.1.0 Overview . 19
5.1.1 Input Formats . 20
5.1.2 Input Interface . 20
5.1.3 Input Stream Synchronization (Optional) . 21
5.1.4 Null Packet Deletion (optional, for TS only, NM and HEM) . 21
5.1.5 CRC-8 encoding (for GFPS and TS, NM only) . 22
5.1.6 Baseband Header (BBHeader) insertion . 22
5.1.7 Mode adaptation sub-system output stream formats . 24
5.2 Stream adaptation . 27
5.2.0 Overview . 27
5.2.1 Scheduler . 27
5.2.2 Padding . 27
5.2.3 BB scrambling . 27
6 Bit-interleaved coding and modulation . 28
6.1 FEC encoding . 28
6.1.0 Overview . 28
6.1.1 Outer encoding (BCH) . 29
6.1.2 Inner encoding (LDPC) . 30
6.1.2.0 Overview . 30
6.1.2.1 Inner coding for normal FECFrame . 30
6.1.2.2 Inner coding for short FECFrame . 32
6.1.3 Bit Interleaver . 32
6.2 Mapping bits onto constellations . 34
6.2.0 Overview . 34
6.2.1 Bit to cell word demultiplexer . 35
6.2.2 Cell word mapping into I/Q constellations . 38
7 Data Slice Packet Generation . 45
7.0 Overview . 45
7.1 Data Slice Packets for Data Slice Type 1 . 45
7.2 Data Slice Packets for Data Slice Type 2 . 45
7.2.0 Overview . 45
7.2.1 FECFrame header signalling data . 46
7.2.2 Coding of the FECFrame header . 47
7.2.2.0 Overview . 47
ETSI

---------------------- Page: 3 ----------------------
4 ETSI EN 302 769 V1.3.1 (2015-10)
7.2.2.1 Error Coding . 48
7.2.2.2 Cyclic Delay . 48
7.2.2.3 Scrambling of the lower branch . 48
7.2.3 Mapping onto QAM constellations . 49
7.2.3.0 Overview . 49
7.2.3.1 Robust FECFrame header . 49
7.2.3.2 High efficiency FECFrame header . 49
7.2.4 Mapping of the XFECFrame cells . 49
7.2.5 Length of the Data Slice Packet for Data Slice Type 2 . 49
7.2.6 Stuffing Data Slice Packets . 50
8 Generation, coding and modulation of Layer 1 part 2 signalling . 51
8.1 Overview . 51
8.2 Preamble Header . 51
8.3 L1 signalling part 2 data . 53
8.3.0 Overview . 53
8.3.1 L1 block padding . 58
8.3.2 CRC for the L1 signalling part 2. 58
8.3.3 L1 padding . 58
8.4 Modulation and error correction coding of the L1 part 2 data . 59
8.4.1 Overview . 59
8.4.2 Parameters for FEC encoding of L1 part 2 data . 61
8.4.3 FEC Encoding . 63
8.4.3.1 Zero padding of BCH information bits . 63
8.4.3.2 BCH encoding . 64
8.4.3.3 LDPC encoding . 64
8.4.3.4 Puncturing of LDPC parity bits . 65
8.4.3.5 Removal of zero padding bits. 65
8.4.3.6 Bit interleaving for L1 signalling part 2 . 66
8.4.4 Mapping bits onto constellations . 66
8.4.4.0 Overview . 66
8.4.4.1 Demultiplexing of L1 signalling part 2 . 66
8.4.4.2 Mapping onto QAM constellations . 67
8.5 Time interleaving of L1 signalling part 2 data . 67
9 Frame Builder . 69
9.0 Introduction . 69
9.1 C2 Frame structure . 69
9.1.0 Overview . 69
9.1.1 Duration of the C2 Frame . 70
9.2 Pilot Reference Sequence . 70
9.2.1 Data Scrambling Sequence . 70
9.2.2 Pilot Scrambling Sequence . 70
9.2.3 Pilot Reference Sequence . 71
9.3 Preamble Symbol . 71
9.3.1 Preamble Symbol overview . 71
9.3.2 Frequency Interleaving . 72
9.3.3 Pilot insertion . 72
9.3.3.0 Overview . 72
9.3.3.1 Locations of the preamble pilots . 73
9.3.3.2 Amplitude and modulation of the preamble pilots . 73
9.3.4 Mapping and scrambling of the signalling data . 73
9.3.5 Notches within Preamble Symbols . 74
9.3.5.0 Overview . 74
9.3.5.1 Narrowband Notches . 74
9.3.5.2 Broadband Notches . 74
9.4 Data Slice generation . 75
9.4.0 Overview . 75
9.4.1 Location of Data Slices . 75
9.4.1.1 Start and end OFDM carrier of Data Slices . 75
9.4.1.2 Maximum width of Data Slices . 75
9.4.1.3 Minimum width of Data Slices . 75
ETSI

---------------------- Page: 4 ----------------------
5 ETSI EN 302 769 V1.3.1 (2015-10)
9.4.1.4 Notches within Data Slices . 75
9.4.2 Number of payload cells in Data Slice. 76
9.4.3 Mapping of the Data Slice Packets . 76
9.4.4 Time Interleaving . 76
9.4.5 Frequency Interleaving . 80
9.5 Stuffing Data Slices . 81
9.6 Pilot Insertion . 81
9.6.1 Introduction. 81
9.6.2 Scattered pilot insertion . 82
9.6.2.0 Overview . 82
9.6.2.1 Locations of the scattered pilots . 82
9.6.2.2 Amplitudes of the scattered pilots . 82
9.6.2.3 Modulation of the scattered pilots . 82
9.6.3 Continual pilot insertion . 83
9.6.3.0 Overview . 83
9.6.3.1 Locations of the continual pilots . 83
9.6.3.2 Amplitudes of the Continual Pilots . 83
9.6.3.3 Modulation of the Continual Pilots . 83
9.6.4 Edge pilot insertion . 83
9.6.4.0 Overview . 83
9.6.4.1 Locations of the edge pilots . 83
9.6.4.2 Amplitudes of the Edge Pilots . 84
9.6.4.3 Modulation of the Edge Pilots . 84
9.7 Dummy carrier reservation . 85
10 OFDM generation . 85
10.0 Introduction . 85
10.1 IFFT - OFDM Modulation . 85
10.2 Guard interval insertion . 87
10.3 Spectrum characteristics . 87
Annex A (normative): Addresses of parity bit accumulators for Nldpc = 64 800 . 89
Annex B (normative): Addresses of parity bit accumulators for Nldpc = 16 200 . 95
Annex C (normative): Input stream synchronizer . 97
Annex D (normative): Input Remultiplexing Subsystem: Splitting of input MPEG-2 Transport
Streams into Data PLPs, generation of a Common PLP of a group of
PLPs and insertion of Null Packets into Transport Streams . 99
D.1 Overview . 99
D.2 Splitting of a group of input TSs into TSPSs streams and a TSPSC stream . 100
D.2.1 General . 100
D.2.2 Extraction of the Common PLP from a group of TS . 100
D.2.3 Insertion of additional Null Packets into TSPSs. 101
D.3 Receiver Implementation Considerations. 102
D.3.0 Introduction . 102
D.3.1 Recombination of TSPSS and TSPSC in a receiver . 102
Annex E (normative): Calculation of the CRC word . 104
Annex F (normative): Bundling of PLPs . 105
Annex G (informative): Transport Stream regeneration and clock recovery using ISCR . 107
Annex H (informative): Pilot patterns . 108
Annex I (informative): Bibliography . 111
History . 112

ETSI

---------------------- Page: 5 ----------------------
6 ETSI EN 302 769 V1.3.1 (2015-10)
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

The Digital Vide
...

Draft ETSI EN 302 769 V1.3.1 (2015-06)






EUROPEAN STANDARD
Digital Video Broadcasting (DVB);
Frame structure channel coding and modulation
for a second generation digital transmission system
for cable systems (DVB-C2)

---------------------- Page: 1 ----------------------
2 Draft ETSI EN 302 769 V1.3.1 (2015-06)



Reference
REN/JTC-DVB-353
Keywords
audio, broadcasting, cable, data, digital, DVB,
MPEG, 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
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the
print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat.
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© European Telecommunications Standards Institute 2015.
© European Broadcasting Union 2015.
All rights reserved.

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of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI

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3 Draft ETSI EN 302 769 V1.3.1 (2015-06)
Contents
Intellectual Property Rights . 6
Foreword . 6
Modal verbs terminology . 6
Introduction . 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 . 11
3.3 Abbreviations . 14
4 DVB-C2 System architecture . 16
4.1 System overview . 16
4.2 System architecture . 16
4.3 Target performance . 19
5 Input processing . 19
5.1 Mode adaptation . 19
5.1.0 Overview . 19
5.1.1 Input Formats . 20
5.1.2 Input Interface . 20
5.1.3 Input Stream Synchronization (Optional) . 21
5.1.4 Null Packet Deletion (optional, for TS only, NM and HEM) . 21
5.1.5 CRC-8 encoding (for GFPS and TS, NM only) . 22
5.1.6 Baseband Header (BBHeader) insertion . 22
5.1.7 Mode adaptation sub-system output stream formats . 24
5.2 Stream adaptation . 27
5.2.0 Overview . 27
5.2.1 Scheduler . 27
5.2.2 Padding . 27
5.2.3 BB scrambling . 27
6 Bit-interleaved coding and modulation . 28
6.1 FEC encoding . 28
6.1.0 Overview . 28
6.1.1 Outer encoding (BCH) . 29
6.1.2 Inner encoding (LDPC) . 30
6.1.2.0 Overview . 30
6.1.2.1 Inner coding for normal FECFrame . 30
6.1.2.2 Inner coding for short FECFrame . 32
6.1.3 Bit Interleaver . 32
6.2 Mapping bits onto constellations . 34
6.2.0 Overview . 34
6.2.1 Bit to cell word demultiplexer . 35
6.2.2 Cell word mapping into I/Q constellations . 38
7 Data Slice Packet Generation . 45
7.0 Overview . 45
7.1 Data Slice Packets for Data Slice Type 1 . 45
7.2 Data Slice Packets for Data Slice Type 2 . 45
7.2.0 Overview . 45
7.2.1 FECFrame header signalling data . 46
7.2.2 Coding of the FECFrame header . 47
7.2.2.0 Overview . 47
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4 Draft ETSI EN 302 769 V1.3.1 (2015-06)
7.2.2.1 Error Coding . 48
7.2.2.2 Cyclic Delay . 48
7.2.2.3 Scrambling of the lower branch . 48
7.2.3 Mapping onto QAM constellations . 49
7.2.3.0 Overview . 49
7.2.3.1 Robust FECFrame header . 49
7.2.3.2 High efficiency FECFrame header . 49
7.2.4 Mapping of the XFECFrame cells . 49
7.2.5 Length of the Data Slice Packet for Data Slice Type 2 . 49
7.2.6 Stuffing Data Slice Packets . 50
8 Generation, coding and modulation of Layer 1 part 2 signalling . 51
8.1 Overview . 51
8.2 Preamble Header . 51
8.3 L1 signalling part 2 data . 53
8.3.0 Overview . 53
8.3.1 L1 block padding . 58
8.3.2 CRC for the L1 signalling part 2. 58
8.3.3 L1 padding . 58
8.4 Modulation and error correction coding of the L1 part 2 data . 59
8.4.1 Overview . 59
8.4.2 Parameters for FEC encoding of L1 part 2 data . 61
8.4.3 FEC Encoding . 63
8.4.3.1 Zero padding of BCH information bits . 63
8.4.3.2 BCH encoding . 64
8.4.3.3 LDPC encoding . 64
8.4.3.4 Puncturing of LDPC parity bits . 65
8.4.3.5 Removal of zero padding bits. 65
8.4.3.6 Bit interleaving for L1 signalling part 2 . 66
8.4.4 Mapping bits onto constellations . 66
8.4.4.0 Overview . 66
8.4.4.1 Demultiplexing of L1 signalling part 2 . 66
8.4.4.2 Mapping onto QAM constellations . 67
8.5 Time interleaving of L1 signalling part 2 data . 67
9 Frame Builder . 69
9.0 Introduction . 69
9.1 C2 Frame structure . 69
9.1.0 Overview . 69
9.1.1 Duration of the C2 Frame . 70
9.2 Pilot Reference Sequence . 70
9.2.1 Data Scrambling Sequence . 70
9.2.2 Pilot Scrambling Sequence . 70
9.2.3 Pilot Reference Sequence . 71
9.3 Preamble Symbol . 71
9.3.1 Preamble Symbol overview . 71
9.3.2 Frequency Interleaving . 72
9.3.3 Pilot insertion . 72
9.3.3.0 Overview . 72
9.3.3.1 Locations of the preamble pilots . 73
9.3.3.2 Amplitude and modulation of the preamble pilots . 73
9.3.4 Mapping and scrambling of the signalling data . 73
9.3.5 Notches within Preamble Symbols . 74
9.3.5.0 Overview . 74
9.3.5.1 Narrowband Notches . 74
9.3.5.2 Broadband Notches . 74
9.4 Data Slice generation . 75
9.4.0 Overview . 75
9.4.1 Location of Data Slices . 75
9.4.1.1 Start and end OFDM carrier of Data Slices . 75
9.4.1.2 Maximum width of Data Slices . 75
9.4.1.3 Minimum width of Data Slices . 75
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5 Draft ETSI EN 302 769 V1.3.1 (2015-06)
9.4.1.4 Notches within Data Slices . 75
9.4.2 Number of payload cells in Data Slice. 76
9.4.3 Mapping of the Data Slice Packets . 76
9.4.4 Time Interleaving . 76
9.4.5 Frequency Interleaving . 80
9.5 Stuffing Data Slices . 81
9.6 Pilot Insertion . 81
9.6.1 Introduction. 81
9.6.2 Scattered pilot insertion . 82
9.6.2.0 Overview . 82
9.6.2.1 Locations of the scattered pilots . 82
9.6.2.2 Amplitudes of the scattered pilots . 82
9.6.2.3 Modulation of the scattered pilots . 82
9.6.3 Continual pilot insertion . 83
9.6.3.0 Overview . 83
9.6.3.1 Locations of the continual pilots . 83
9.6.3.2 Amplitudes of the Continual Pilots . 83
9.6.3.3 Modulation of the Continual Pilots . 83
9.6.4 Edge pilot insertion . 83
9.6.4.0 Overview . 83
9.6.4.1 Locations of the edge pilots . 83
9.6.4.2 Amplitudes of the Edge Pilots . 84
9.6.4.3 Modulation of the Edge Pilots . 84
9.7 Dummy carrier reservation . 85
10 OFDM generation . 85
10.0 Introduction . 85
10.1 IFFT - OFDM Modulation . 85
10.2 Guard interval insertion . 87
10.3 Spectrum characteristics . 87
Annex A (normative): Addresses of parity bit accumulators for Nldpc = 64 800 . 89
Annex B (normative): Addresses of parity bit accumulators for Nldpc = 16 200 . 95
Annex C (normative): Input stream synchronizer . 97
Annex D (normative): Input Remultiplexing Subsystem: Splitting of input MPEG-2 Transport
Streams into Data PLPs, generation of a Common PLP of a group of
PLPs and insertion of Null Packets into Transport Streams . 99
D.1 Overview . 99
D.2 Splitting of a group of input TSs into TSPSs streams and a TSPSC stream . 100
D.2.1 General . 100
D.2.2 Extraction of the Common PLP from a group of TS . 100
D.2.3 Insertion of additional Null Packets into TSPSs. 101
D.3 Receiver Implementation Considerations. 102
D.3.0 Introduction . 102
D.3.1 Recombination of TSPSS and TSPSC in a receiver . 102
Annex E (normative): Calculation of the CRC word . 104
Annex F (normative): Bundling of PLPs . 105
Annex G (informative): Transport Stream regeneration and clock recovery using ISCR . 107
Annex H (informative): Pilot patterns . 108
Annex I (informative): Bibliography . 111
History . 112

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6 Draft ETSI EN 302 769 V1.3.1 (2015-06)
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 draft 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), and is now submitted for the combined Public Enquiry and Vote phase
of the ETSI standards EN Approval Procedure.
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 headquarter
...

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