ETSI EN 302 307-2 V1.1.1 (2015-02)

Digital Video Broadcasting (DVB); Second generation framing structure, channel coding and modulation systems for Broadcasting, Interactive Services, News Gathering and other broadband satellite applications; Part 2: DVB-S2 Extensions (DVB-S2X)

DEN/JTC-DVB-341-2

Digitalna videoradiodifuzija (DVB) - Druga generacija strukture okvirov, kodiranja kanalov in modulacijskih sistemov za radiodifuzijo, interaktivne storitve, novinarstvo in druge širokopasovne satelitske aplikacije - 2. del: Priključki DVB-S2 (DVB-S2X)

Ta dokument določa izbirne priključke sistema S2, označene z nazivom S2X.

General Information

• Status: Published
• Publication Date: 17-Feb-2015
• Technical Committee: BROADCAS - EBU/CENELEC/ETSI on Broadcasting
• Current Stage: 12 - Completion
• Due Date: 27-Feb-2015
• Completion Date: 18-Feb-2015
• Ref Project: SIST EN 302 307-2 V1.1.1:2015 - Digital Video Broadcasting (DVB) - Second generation framing structure, channel coding and modulation systems for Broadcasting, Interactive Services, News Gathering and other broadband satellite applications - Part 2: DVB-S2 Extensions (DVB-S2X)

Overview

ETSI EN 302 307-2 V1.1.1 (2015-02) (DVB‑S2X) defines the optional extensions to the DVB‑S2 second‑generation satellite transmission system. Published by ETSI and adopted by SIST, this document specifies enhanced framing, channel coding and modulation features designed for broadcasting, interactive services, news gathering and other broadband satellite applications. DVB‑S2X builds on DVB‑S2 to provide higher spectral efficiency, more flexible frame formats and advanced modulation/coding combinations.

Key topics and technical requirements

The standard covers detailed physical‑layer and subsystem specifications, including:

• Mode adaptation and stream adaptation

  • Input interfaces, null‑packet deletion, CRC‑8 for packet streams, BB scrambling and padding.
  • GSE High Efficiency Mode (GSE‑HEM) and Transport Stream (TS) handling.

• Channel bonding and multichannel reception

  • Channel bonding mechanisms for multi‑tuner receivers (TS and GSE transmission).

• Forward Error Correction (FEC)

  • Outer BCH encoding and inner LDPC encoding for multiple FECFRAME sizes (examples in the document: 16 200, 32 400, 64 800).
  • Bit interleavers and parity accumulator addressing.

• Modulation and constellations

  • Extended constellation support including QPSK, 8PSK, and multiple APSK formats up to 256‑APSK.
  • Detailed bit‑mapping rules, π/2‑BPSK (VL‑SNR modes) and VL‑SNR specific handling.

• Physical Layer (PL) framing and signalling

  • PLFRAME structure, PL headers (PLH), MODCOD signalling, PLS codes, pilot insertion, PL scrambling.
  • Optional Super‑Framing Structure for advanced scheduling, pilot alignment and flexible formats.

• Operational features

  • Variable Length SNR (VL‑SNR) modes, short/medium frame shortening and puncturing, and signalling for adaptive coding and modulation (ACM).
  • Return‑channel signalling considerations for reception quality (normative for ACM).

Practical applications and users

DVB‑S2X is intended for stakeholders who require high spectral efficiency and flexible satellite link design:

• Satellite broadcast network operators and service providers (TV, radio, DTH)
• Satellite news gathering (SNG) and contribution links
• Equipment manufacturers (modulators, demodulators, IRDs, multi‑tuner receivers)
• System integrators and RF/links engineers optimizing bandwidth and robustness
• Test laboratories and certification bodies validating DVB‑S2X implementations

Use cases include high‑capacity DTH, professional contribution, IP trunking over satellite and mobile/VSAT networks where improved modulation and coding yields greater throughput or link margin.

Related standards

• DVB‑S2 (baseline standard) - DVB‑S2X provides optional extensions and enhanced modes.
• ETSI EN 302 307 series (ETSI publications and normative references listed in the document).

Keywords: DVB‑S2X, DVB‑S2 extensions, satellite broadcasting, modulation, LDPC, BCH, APSK, channel coding, physical layer framing, channel bonding, GSE, VL‑SNR, ACM.

Standards Content (Sample)

Draft ETSI ENN 302 307-2 V1.1.1 (2014-10)

EUROPEAN STANDARD
Digital Viideo Bd roadcasting (DVB);
Second generation fraframing structure, channel cocoding and
modulation n systems for Broadcasting, ,
Interactive SeServices, News Gathering anndd
other broadbdband satellite applications;;
Part 2: DVBB-S2 Extensions (DVB-S2X)

2 Draft ETSI EN 302 307-2 V1.1.1 (2014-10)

Reference
DEN/JTC-DVB-341-2
Keywords
BSS, digital, DVB, modulation, satellite, TV
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ETSI
3 Draft ETSI EN 302 307-2 V1.1.1 (2014-10)
Contents
Intellectual Property Rights . 6
Foreword . 6
Modal verbs terminology . 7
Introduction . 7
1 Scope . 8
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 9
3 Symbols and abbreviations . 9
3.1 Symbols . 9
3.2 Abbreviations . 9
4 Transmission system description . 9
4.1 System definition . 9
4.2 System architecture . 9
4.3 System configurations . 10
5 Subsystems specifications . 14
5.1 Mode adaptation . 14
5.1.1 Input Interfaces . 14
5.1.2 Input stream synchronizer (optional, not relevant for single TS - BS) . 14
5.1.3 Null-Packet Deletion (ACM and Transport Stream only) . 14
5.1.4 CRC-8 encoder (for packetized streams only) . 14
5.1.5 Merger/Slicer . 14
5.1.6 Base-Band Header insertion . 14
5.1.7 GSE High Efficiency Mode (GSE-HEM) . 15
5.1.8 Channel bonding for multi-tuner (L) receivers . 16
5.1.8.1 Introduction to channel bonding . 16
5.1.8.2 Channel bonding for TS transmission . 16
5.1.8.3 Channel bonding for GSE transmission . 18
5.2 Stream Adaptation . 20
5.2.1 Padding . 20
5.2.2 BB scrambling . 20
5.3 FEC Encoding . 20
5.3.1 Outer encoding (BCH) . 21
5.3.2 Inner encoding (LDPC) . 22
5.3.2.1 Inner coding for normal FECFRAME. 22
5.3.2.2 Inner coding for short and medium FECFRAME . 22
5.3.3 Bit interleaver . 23
5.4 Constellations and Bit mapping. 25
5.4.0 Bit mapping into π/2BPSK constellation (VL-SNR modes) . 25
5.4.1 Bit mapping into QPSK constellation . 25
5.4.2 Bit mapping into 8PSK and 8APSK constellations . 25
5.4.3 Bit mapping into 16APSK constellation . 26
5.4.4 Bit mapping into 32APSK constellations . 28
5.4.5 Bit mapping into 64APSK constellations . 30
5.4.6 Bit mapping into 128APSK constellations . 33
5.4.7 Bit mapping into 256APSK constellations . 35
5.5 Physical Layer (PL) framing . 41
5.5.1 Dummy PLFRAME insertion . 42
5.5.2 PL signalling . 42
5.5.2.1 SOF field . 44
5.5.2.2 MODCOD field . 44
5.5.2.3 TYPE field . 46
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4 Draft ETSI EN 302 307-2 V1.1.1 (2014-10)
5.5.2.4 PLS code, no time slicing . 46
5.5.2.5 VL-SNR Header . 47
5.5.2.6 Shortening and Puncturing of VL-SNR MODCODs . 49
5.5.3 Pilot Insertion. 49
5.5.4 Physical layer scrambling . 50
5.5.4.1 PL scrambling for VL-SNR frames . 50
5.5.4.1.1 π/2-BPSK modulated frames . 51
5.6 Baseband shaping and quadrature modulation . 51
6 Error performance . 51
Annex A (normative): Signal spectrum at the modulator output . 54
Annex B (normative): Addresses of parity bit accumulators for n = 64 800 . 56
ldpc
Annex C (normative): Addresses of parity bit accumulators for nldpc = 16 200 and
nldpc = 32 400 . 93
Annex D (normative): Additional tools . 97
D.1 Implementation of TS based channel bonding . 97
D.1.1 Transmitting side . 97
D.1.2 Receiving side (informative) . 97
D.2 Void . 97
D.3 Void . 97
D.4 Void . 98
D.5 Signalling of reception quality via return channel (Normative for ACM) . 98
Annex E (normative): Super-Framing Structure (optional) . 100
E.1 Purpose of Super-Framing Structure . 100
E.2 Specification of Super-Frame as a Container . 100
E.2.1 Super-Frame Structure . 100
E.2.2 Start of Super-Frame (SOSF) Field . 101
E.2.3 Super-Frame Format Indicator (SFFI) Field. 102
E.2.4 Two-Way Scrambling . 102
E.2.4.1 Scrambling Sequence Generation . 102
E.2.4.2 Two-Way Scrambling Method . 103
E.3 Format Specifications as Super-Frame Content . 104
E.3.1 Super-Frame-aligned Pilots (SF-Pilots). 105
E.3.1.1 Specification of SF-Pilots Type A . 105
E.3.2 Format Specification 0: DVB-S2X. 106
E.3.2.1 Pilot structure . 106
E.3.2.2 Modified VL-SNR-frame . 107
E.3.3 Format Specification 1: DVB-S2 legacy . 107
E.3.4 Format Specification 2: Bundled PLFRAME (64 800 payload Size) with SF-Pilots . 108
E.3.4.1 Bundled PLFRAME (64 800 payload) Definition . 108
E.3.4.2 PLHEADER Specification for Bundled PLFRAMEs (64 800 payload) . 110
E.3.4.3 SF-Pilot Structure . 112
E.3.5 Format Specification 3: Bundled PLFRAME (16 200 Payload Size) with SF-Pilots. 113
E.3.5.1 Bundled PLFRAME Definition . 114
E.3.5.2 PLHEADER Specification for Short Bundled PLFRAME. 115
E.3.5.3 SF-Pilot Structure . 116
E.3.6 Format Specification 4: Flexible Format with VL-SNR PLH tracking . 117
E.3.6.1 Super-Frame Header (SFH) . 118
E.3.6.2 SFH-Trailer (ST) . 119
E.3.6.3 Physical Layer Header (PLH) . 120
E.3.6.3.1 PLSCODE Definition. 120
E.3.6.3.2 PLH Protection Levels . 120
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5 Draft ETSI EN 302 307-2 V1.1.1 (2014-10)
E.3.6.3.3 Signalling of MOD/COD/SPREAD and TYPE . 121
E.3.6.3.4 Field for ISI or SID or TSN . 122
E.3.6.3.5 SOF Sequence . 122
E.3.6.4 PLFRAME structure . 123
E.3.6.5 Pilot structure . 123
E.3.6.5.1 SF-Pilots . 123
E.3.6.5.2 Special VL-SNR Pilots . 124
E.3.6.6 Spreading and Signalling Rules . 124
E.3.6.7 Dummy Frame Definition . 124
E.3.6.7.1 Dummy frames with deterministic content . 125
E.3.6.7.2 Dummy frames with arbitrary content . 126
E.3.7 Format Specifications 5 - 15: Reserved . 126
E.4 Signalling of additional reception quality parameters via return channel (Normative for
Interference Management at the Gateway). 126
Annex F: For future use . 128
Annex G: For future use . 129
Annex H (informative): Examples of possible use of the System . 130
H.1 Void . 130
H.2 Void . 130
H.3 Void . 130
H.4 Void . 130
H.5 Void . 130
H.6 Void . 130
H.7 Satellite transponder models for simulations . 130
H.8 Phase noise masks for simulations . 132
Annex I (normative): ACM Command . 134
Annex J: For future use . 135
Annex K: For future use . 136
Annex L: For future use . 137
Annex M (normative): Transmission format for wideband satellite transponders using time-
slicing (optional) . 138
History . 139

ETSI
6 Draft ETSI EN 302 307-2 V1.1.1 (2014-10)
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 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 headquarters is in Geneva.
European Broadcasting Union
CH-1218 GRAND SACONNEX (Geneva)
Switzerland
Tel: [phone]
Fax: [phone]
The Digital Video Broadcasting 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 that 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.
The present document is part 2 of a multipart deliverable covering the optional extensions of the DVB-S2 system,
denoted "DVB-S2X", as identified below:
Part 1: "DVB-S2";
Part 2: "DVB-S2 Extensions (DVB-S2X)".

Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 6 months after doa

ETSI
7 Draft ETSI EN 302 307-2 V1.1.1 (2014-10)
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "may not", "need", "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.
Introduction
The optional extensions of the S2 system have been approved in 2014 and are identified by the S2X denomination.
Such extensions are non-backwards-compatible with EN 302 307 (V1.1.1) [4], are optional for the implementation of
new receivers under EN 302 307-1 [3], but are normative for the implementation of receivers under the present
document: mapping of specific S2X building blocks to application areas is specified in Table 1. For every S2X
application area, as defined in Table 1, the configurations for the corresponding S2 application area, as defined in
EN 302 307-1 [3], Table 1, will be implemented. In case of conflicts the definition of the S2X application area applies.
The present document targets the core application areas of S2 (Digital Video Broadcasting, forward link for interactive
services using ACM, Digital Satellite News Gathering and professional digital links such as video point-to-point or
Internet trunking links), and new application areas requiring very-low carrier-to-noise and carrier-to-interference
operation (VL-SNR).
In particular for DTH, a possible use case is the launch of UHDTV-1 (e.g. 4k) television services in Ku-/Ka-band that
will adopt HEVC encoding. In this context it may be desirable to eventually use fragments of smaller blocks of capacity
on two or three DTH transponders and bond them into one logical stream. This permits to maximize capacity
exploitation by avoiding the presence of spare capacity in individual transponders and/or to take maximum advantage of
statistical multiplexing.
The S2X system offers the ability to operate with very-low carrier-to-noise and carrier-to-interference ratios (SNR
down to -10 dB), to serve markets such as airborne (business jets), maritime, civil aviation internet access, VSAT
terminals at higher frequency ranges or in tropical zones, small portable terminals for journalists and other
professionals. Furthermore, the S2X system provides transmission modes offering significantly higher capacity and
efficiency to serve professional links characterized by very-high carrier-to-noise and carrier-to-interference ratios
conditions.
The present document reuses the S2 system architecture, while adding finer MODCOD steps, sharper roll-off filtering,
technical means for bonding of multiple transponders and additional signalling capacity by means of an optional
periodic super-frame structure, extended PLHEADER signalling schemes and the support of GSE-Lite signals.
The present document maintains the same clause numbering as EN 302 307-1 [3], in order to facilitate cross-reference.
ETSI
8 Draft ETSI EN 302 307-2 V1.1.1 (2014-10)
1 Scope
The present document specifies the optional extensions of the S2 system, identified by the S2X denomination.
2 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.
2.1 Normative references
The following referenced documents are necessary for the application of the present document.
[1] ETSI TS 101 545-1 (V1.1.1): "Digital Video Broadcasting (DVB);Second Generation DVB
Interactive Satellite System (DVB-RCS2); Part 1: Overview and System Level specification".
[2] ETSI TS 102 606-1 (V1.2.1): "Digital Video Broadcasting (DVB); Generic Stream Encapsulation
(GSE); Part 1: Protocol".
[3] ETSI EN 302 307-1: "Digital Video Broadcasting (DVB); Second generation framing structure,
channel coding and modulation systems for Broadcasting, Interactive Services, News Gathering
and other broadband satellite applications; Part 1: DVB-S2".
[4] ETSI EN 302 307 (V1.1.1): "Digital Video Broadcasting (DVB); Second generation framing
structure, channel coding and modulation systems for Broadcasting, Interactive Services, News
Gathering and other broadband satellite applications".
[5] ETSI EN 300 468: "Digital Video Broadcasting (DVB); Specification for Service Information (SI)
in DVB systems".
[6] ETSI TS 102 606-2: "Digital Video Broadcasting (DVB); Generic Stream Encapsulation (GSE);
Part 2: Logical Link Control (LLC)".
[7] ETSI ETS 300 801: "Digital Video Broadcasting (DVB); Interaction channel through Public
Switched Telecommunications Network (PSTN)/ Integrated Services Digital Networks (ISDN)".
[8] ETSI EN 301 195: "Digital Video Broadcasting (DVB); Interaction channel through the Global
System for Mobile communications (GSM)".
[9] ETSI ES 200 800: "Digital Video Broadcasting (DVB); DVB interaction channel for Cable TV
distribution systems (CATV)".
[10] ETSI ETS 300 802: "Digital Video Broadcasting (DVB); Network-independent protocols for DVB
interactive services".
[11] ETSI EN 301 790: "Digital Video Broadcasting (DVB); Interaction channel for satellite
distribution systems".
ETSI
9 Draft ETSI EN 302 307-2 V1.1.1 (2014-10)
2.2 Informative references
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.
Not applicable.
3 Symbols and abbreviations
3.1 Symbols
For the purposes of the present document, the symbols given in EN 302 307-1 [3] apply.
3.2 Abbreviations
For the purposes of the present document, the terms and definitions given in EN 302 307-1 [3] and the following apply:
128APSK 128-ary Amplitude and Phase Shift Keying
256APSK 256-ary Amplitude and Phase Shift Keying
64APSK 64-ary Amplitude and Phase Shift Keying
BPSK Binary Phase Shift Keying
CU Capacity Unit
GSE Generic Stream Encapsulation
GSE-HEM Generic Stream Encapsulation - High Efficiency Mode
HEVC High Efficiency Video Coding
SF Super-Frame
SFFI Super-Frame Format Indicator
SFH Super-Frame Header
SOSF Start Of Super-Frame
ST Super-Frame header Trailer
UHDTV Ultra High Definition TeleVision
VL-SNR Very Low - Signal to Noise Ratio
4 Transmission system description
See EN 302 307-1 [3], clause 4.
4.1 System definition
See EN 302 307-1 [3], clause 4.1.
4.2 System architecture
See EN 302 307-1 [3], clause 4.2.
The present document reuses the S2 system architecture as described in EN 302 307-1 [3], Figure 1, while adding finer
MODCOD steps, sharper roll-off filtering, technical means allowing time-slicing of wide-band signals (for a reduced
processing speed in the receiver), technical means for bonding of multiple transponders, among other technologies.
ETSI
10 Draft ETSI EN 302 307-2 V1.1.1 (2014-10)
Additional signalling capacity is provided:
• an optional periodic super-frame structure with signalling of the format of the super-frame content and further
benefits like simplifying synch recovery at VL-SNR and allowing periodic pilot structures and PL-Scramblers;
• an extended PLHEADER signalling scheme to support the additional MODCODs;
• an extended PLHEADER signalling scheme to support Mobile Frames (VL-SNR);
• a high-efficiency BBFRAME mode (GSE-HEM), similar to the T2 and C2 systems, to transport
GSE/GSE-Lite packets;
• signalling of streams which are GSE-Lite compliant.
4.3 System configurations
See EN 302 307-1 [3], clause 4.3.
Table 1 associates the S2X system elements to the applications areas. All elements in Table 1 are optional in
transmitting and receiving equipment complying with the S2 specification. At least "Normative" subsystems and
functionalities shall be implemented in the transmitting and receiving equipment to comply with the present document
for a specific application area.
ETSI
11 Draft ETSI EN 302 307-2 V1.1.1 (2014-10)
Table 1: S2X System configurations and application areas
System configurations Broadcast Interactive DSNG Professional VL-SNR
services services services
FECFRAME (normal) 64 800 (bits)
(see MODCODs
below)
QPSK 1/4,1/3, 2/5 N N N N N
(S2-MODCODs)
1/2, 3/5, 2/3, 3/4, 4/5, 5/6, N N N N N
8/9, 9/10
(S2-MODCODs)
13/45 N N N N N
9/20; 11/20 N N N N N
8PSK 3/5, 2/3, 3/4, 5/6, 8/9, 9/10 N
N N N N
(S2-MODCODs)
23/36; 25/36; 13/18 N N N N N
8APSK-L (note 7) 5/9;26/45 N N N N N
16APSK 2/3, 3/4, 4/5, 5/6, 8/9, 9/10 N N N N N
(S2-MODCODs)
26/45; 3/5; 28/45; 23/36; 25/36; N N N N N
13/18; 7/9; 77/90
16APSK-L (note 7) 5/9; 8/15; 1/2; 3/5; 2/3 N N N N N
32APSK 3/4, 4/5, 5/6, 8/9, 9/10 N N N N N
(S2-MODCODs)
32/45; 11/15; 7/9 N N N N N
32APSK-L (note 7) 2/3 N N N N N
64APSK 11/15; 7/9; 4/5; 5/6 O N N N O
64APSK-L (note 7) 32/45 O N N N O
128APSK 3/4; 7/9 NA O O N NA
256APSK 32/45; 3/4 NA O O N NA
256APSK-L (note 7) 29/45; 2/3; 31/45; 11/15 NA O O N NA

FECFRAME (short) 16 200 (bits)
(see MODCODs
below)
ETSI
12 Draft ETSI EN 302 307-2 V1.1.1 (2014-10)
System configurations Broadcast Interactive DSNG Professional VL-SNR
services services services
QPSK 1/4,1/3, 2/5 NA N O N N
(S2-MODCODs)
1/2, 3/5, 2/3, 3/4, 4/5, 5/6, NA N O N N
8/9
(S2-MODCODs)
11/45; 4/15; 14/45; 7/15 8/15; NA N O N N
32/45
8PSK 3/5, 2/3, 3/4, 5/6, 8/9 N
NA N O N
(S2-MODCODs)
7/15; 8/15; 26/45; 32/45 NA N O N N
16APSK 2/3, 3/4, 4/5, 5/6, 8/9 NA N O N N
(S2-MODCODs)
7/15; 8/15; 26/45; 3/5; 32/45 NA N O N N
32APSK 3/4, 4/5, 5/6, 8/9 NA N O N N
(S2-MODCODs)
2/3; 32/45 NA N O N N
VL-SNR Header O O O NA N
(see MODCODs
below) (note 1)
QPSK 2/9 (normal) NA O O NA N
BPSK 1/5; 4/15; 1/3 (short) NA O O NA N
1/5; 11/45; 1/3 (medium)
BPSK-S 1/5; 11/45 (short) NA O O NA N
Spreading Factor 2
Super-frame NA O O O O
Part 2 PLHEADER 8-bits N N N N N
(note 5)
Extended PLHEADER 8+8 bits (time slicing) O O NA O O
For Wide-band mode
(note 5)
GSE-High Efficiency For GSE/GSE-Lite N N N N N
Mode (note 6)
Roll-off 0,15; 0,10 and N N N N N
0,05
Channel bonding N NA NA O NA
(note 2) (note 3)
ETSI
13 Draft ETSI EN 302 307-2 V1.1.1 (2014-10)
System configurations Broadcast Interactive DSNG Professional VL-SNR
services services services
VCM N N N N N
(note 4)
ACM NA N O O N
N = normative, O = optional, NA = not applicable.
NOTE 1: Ability to skip VL-SNR frames: Normative.
NOTE 2: Requires Input Stream Synchronizer, Null-Packet Deletion and Dummy Frame insertion.
NOTE 3: Normative for broadcast services in case of optional multiple tuner receivers.
NOTE 4: Any S2X receiver shall be able to recognize the whole set of MODCODS within the PLHeader and skip the XFECFrame if the
MODCOD is not supported.
NOTE 5: Part 2 PLHEADER and Extended PLHEADER for wideband transponders (Part 1 [3] or Part 2, annex M) cannot coexist in the
same carrier but either can coexist with the VL-SNR header.
NOTE 6: GSE is optional while support for GSE-Lite in GSE-HEM is normative across all the services.
NOTE 7: xxx-L= MODCODs optimized for quasi-linear channels.

ETSI
14 Draft ETSI EN 302 307-2 V1.1.1 (2014-10)
Within the present document, a number of configurations and mechanisms are defined as "Optional". Configurations
and mechanisms explicitly indicated as "optional" within the present document, for a given application area, need not be
implemented in the equipment to comply with the present document. Nevertheless, when an "optional" mode or
mechanism is implemented, it shall comply with the specification as given in the present document.
5 Subsystems specifications
5.1 Mode adaptation
See EN 302 307-1 [3], clause 5.1.
According to Figure 3, the input sequence(s) is (are):
• Single or multiple Transport Streams (TS).
• Single or multiple Generic Streams (packetized, continuous or high-efficiency mode (HEM) packetized).
The output sequence is a BBHEADER (80 bits) followed by a DATA FIELD.
5.1.1 Input Interfaces
See EN 302 307-1 [3], clause 5.1.1.
An efficient input interface has been introduced as GSE-HEM. For details of GSE-HEM, see clause 5.1.7.
5.1.2 Input stream synchronizer (optional, not relevant for single TS - BS)
See EN 302 307-1 [3], clause 5.1.2.
5.1.3 Null-Packet Deletion (ACM and Transport Stream only)
See EN 302 307-1 [3], clause 5.1.3.
5.1.4 CRC-8 encoder (for packetized streams only)
See EN 302 307-1 [3], clause 5.1.4.
5.1.5 Merger/Slicer
See EN 302 307-1 [3], clause 5.1.5.
5.1.6 Base-Band Header insertion
See EN 302 307-1 [3], clause 5.1.6.
First byte (MATYPE-1):
• TS/GS field (2 bits): Transport Stream Input, Generic Stream Input (packetized or continuous) or GSE-HEM.
• SIS/MIS field (1 bit): Single Input Stream or Multiple Input Stream.
• CCM/ACM field (1 bit): Constant Coding and Modulation or Adaptive Coding and Modulation (VCM is
signalled as ACM).
• ISSYI (1 bit), (Input Stream Synchronization Indicator): If ISSYI = 1 = active, the ISSY field (see annex D) is
inserted after UPs or in the baseband header in GSE-HEM.
ETSI
15 Draft ETSI EN 302 307-2 V1.1.1 (2014-10)
• For TS input mode:
- NPD (1 bit): Null-packet deletion active/not active.
• For GSE/Generic Continuous/Generic Packetized modes:
- GSE-Lite (1 bit): GSE stream is GSE-Lite compliant/non-compliant.
• RO (2 bits): Transmission Roll-off factor (α). Three additional roll-off factors shall be available, 0,15; 0,10
and 0,05. Signalling shall be according to the following rule (Table 2):
- If RO bits are signalled consistently from BBHEADER to BBHEADER as either 00, 01, 10 the
backward compatible definition (High roll-off range) applies:
00 = 0,35
01 = 0,25
10 = 0,20
- If RO bits are signalled from BBHEADER to BBHEADER in an alternating way with 11 then their
interpretation shall be Low roll-off range:
00 = 0,15
01 = 0,10
10 = 0,05
It shall be ensured that in a Multiple Input Stream configuration (SIS/MIS field = 0) alternation is
unambiguously evident over all Input Streams (for every ISI) and MODCOD combinations, such that any
receiver will receive regular alternation. Any receiver, once locked will switch to low roll-off range on first
detection of '11'.
Table 2 (see EN 302 307-1 [3], Table 3): MATYPE-1 field mapping
TS/GS SIS/MIS CCM/ACM ISSYI NPD/GSE-Lite RO
No
Alternation Alternation
with 11 = with 11 =
high roll- low roll-off
off range range
11 = Transport 1 = single 1 = CCM 1 = active 1 = active
00 = 0,15
00 = 0,35
00 = Generic Packetized 0 = multiple 0 = ACM 0 = not-active 0 = not-active
01 = 0,25 01 = 0,10
01 = Generic continuous
10 = 0,20 10 = 0,05
10 = GSE-HEM
NOTE: GSE-Lite signals are defined in annex D of TS 102 606-1 [2].
5.1.7 GSE High Efficiency Mode (GSE-HEM)
GSE variable-length or constant length UPs may be transmitted in GSE-HEM. In GSE-HEM, slicing of GSE packets is
performed and SYNCD shall always be computed. The receiver may derive the length of the UPs from the packet
header, therefore UPL transmission in BBHEADER is not performed. UPs shall not be sliced when there is a
BBFRAME from a different stream following, splitting is only possible with the immediately following BBFRAME.
The optional ISSY field is transmitted in the BBHEADER.
The Mode Adaptation unit shall perform the following sequence of operations (see Figure 1):
• Optional input stream synchronization (see EN 302 307-1 [3], clause D.2) relevant to the first transmitted UP
which starts in the data field; ISSY field inserted in the UPL and SYNC fields of the BBHEADER.
• Null-packet Deletion and CRC-8 at UP level shall not be computed nor inserted.
ETSI
16 Draft ETSI EN 302 307-2 V1.1.1 (2014-10)
• SYNCD computation (pointing at the first bit of the first transmitted UP which starts in the Data Field) and
storage in BBHEADER. The transmitted UP corresponds exactly to the original UP itself. Hence SYNCD
points to the first bit of the original UP.
• UPL not computed nor transmitted.
th
• GSE-Lite compliance of the stream shall be signalled in the 6 bit of the MATYPE-1 field. GSE-Lite=1 means
a GSE-Lite compliant signal is transmitted. GSE-Lite=0 means that the transmitted GSE stream may not meet
the definition of a GSE-Lite signal.

UPL (in GSE Headers)
Time
GSE
UP    UP UP        UP UP
User Packet
SYNCD
80 bits
DFL
BBHEADER DATA FIELD
MATYPE ISSY DFL ISSY SYNCD CRC-8
(2 bytes) (2 MSB) (2 bytes) (1 LSB) (2 bytes) MODE (1 byte)
Optional
Figure 1: Stream format at the output of the MODE ADAPTER, High Efficiency Mode for GSE
(no CRC-8 computed for UPs, optional single ISSY inserted
in the BBHEADER, UPL not transmitted)
5.1.8 Channel bonding for multi-tuner (L) receivers
5.1.8.1 Introduction to channel bonding
The present document provides tools to implement "channel bonding", where a single input stream is carried in parallel
over L transponders. The maximum number of bonded transponders shall be 3 (L ≤ 3).
Channel bonding allows for example to avoid un-used capacity in a transponder in case of Constant Bit-Rate (CBR)
video programmes, and /or to maximize the statistical multiplexing gain in cas
...

ETSI EN 30302 307-2 V1.1.1 (2012015-02)

EUROPEAN STANDARD
Digital Viideo Bd roadcasting (DVB);
Second generation fraframing structure, channel cocoding and
modulation n systems for Broadcasting, ,
Interactive SeServices, News Gathering anndd
other broadbdband satellite applications;;
Part 2: DVBB-S2 Extensions (DVB-S2X)

2 ETSI EN 302 307-2 V1.1.1 (2015-02)

Reference
DEN/JTC-DVB-341-2
Keywords
BSS, digital, DVB, modulation, satellite, TV
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ETSI
3 ETSI EN 302 307-2 V1.1.1 (2015-02)
Contents
Intellectual Property Rights . 6
Foreword . 6
Modal verbs terminology . 7
Introduction . 7
1 Scope . 8
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 9
3 Symbols and abbreviations . 9
3.1 Symbols . 9
3.2 Abbreviations . 9
4 Transmission system description . 9
4.1 System definition . 9
4.2 System architecture . 9
4.3 System configurations . 10
5 Subsystems specifications . 14
5.1 Mode adaptation . 14
5.1.1 Input Interfaces . 14
5.1.2 Input stream synchronizer (optional, not relevant for single TS - BS) . 14
5.1.3 Null-Packet Deletion (ACM and Transport Stream only) . 14
5.1.4 CRC-8 encoder (for packetized streams only) . 14
5.1.5 Merger/Slicer . 14
5.1.6 Base-Band Header insertion . 14
5.1.7 GSE High Efficiency Mode (GSE-HEM) . 15
5.1.8 Channel bonding for multi-tuner (L) receivers . 16
5.1.8.1 Introduction to channel bonding . 16
5.1.8.2 Channel bonding for TS transmission . 16
5.1.8.3 Channel bonding for GSE transmission . 18
5.2 Stream Adaptation . 19
5.2.1 Padding . 19
5.2.2 BB scrambling . 19
5.3 FEC Encoding . 19
5.3.1 Outer encoding (BCH) . 21
5.3.2 Inner encoding (LDPC) . 21
5.3.2.1 Inner coding for normal FECFRAME. 21
5.3.2.2 Inner coding for short and medium FECFRAME . 22
5.3.3 Bit interleaver . 22
5.4 Constellations and Bit mapping. 24
5.4.0 Bit mapping into π/2BPSK constellation (VL-SNR modes) . 24
5.4.1 Bit mapping into QPSK constellation . 24
5.4.2 Bit mapping into 8PSK and 8APSK constellations . 24
5.4.3 Bit mapping into 16APSK constellation . 25
5.4.4 Bit mapping into 32APSK constellations . 27
5.4.5 Bit mapping into 64APSK constellations . 29
5.4.6 Bit mapping into 128APSK constellations . 33
5.4.7 Bit mapping into 256APSK constellations . 34
5.5 Physical Layer (PL) framing . 40
5.5.1 Dummy PLFRAME insertion . 41
5.5.2 PL signalling . 41
5.5.2.1 SOF field . 43
5.5.2.2 MODCOD field . 43
5.5.2.3 TYPE field . 45
5.5.2.4 PLS code, no time slicing . 45
ETSI
4 ETSI EN 302 307-2 V1.1.1 (2015-02)
5.5.2.5 VL-SNR Header . 46
5.5.2.6 Shortening and Puncturing of VL-SNR MODCODs . 47
5.5.3 Pilot Insertion. 48
5.5.4 Physical layer scrambling . 48
5.5.4.1 PL scrambling for VL-SNR frames . 49
5.5.4.1.1 π/2-BPSK modulated frames . 49
5.6 Baseband shaping and quadrature modulation . 49
6 Error performance . 50
Annex A (normative): Signal spectrum at the modulator output . 52
Annex B (normative): Addresses of parity bit accumulators for n = 64 800 . 54
ldpc
Annex C (normative): Addresses of parity bit accumulators for nldpc = 16 200 and
nldpc = 32 400 . 91
Annex D (normative): Additional tools . 95
D.1 Implementation of TS based channel bonding . 95
D.1.1 Transmitting side . 95
D.1.2 Receiving side (informative) . 95
D.2 Void . 95
D.3 Void . 95
D.4 Void . 95
D.5 Signalling of reception quality via return channel (Normative for ACM) . 96
Annex E (normative): Super-Framing Structure (optional) . 98
E.1 Purpose of Super-Framing Structure . 98
E.2 Specification of Super-Frame as a Container . 98
E.2.1 Super-Frame Structure . 98
E.2.2 Start of Super-Frame (SOSF) Field . 99
E.2.3 Super-Frame Format Indicator (SFFI) Field. 99
E.2.4 Two-Way Scrambling . 100
E.2.4.1 Scrambling Sequence Generation . 100
E.2.4.2 Two-Way Scrambling Method . 101
E.3 Format Specifications as Super-Frame Content . 102
E.3.1 Super-Frame-aligned Pilots (SF-Pilots). 102
E.3.1.1 Specification of SF-Pilots Type A . 103
E.3.2 Format Specification 0: DVB-S2X. 103
E.3.2.1 Pilot structure . 104
E.3.2.2 Modified VL-SNR-frame . 104
E.3.3 Format Specification 1: DVB-S2 legacy . 105
E.3.4 Format Specification 2: Bundled PLFRAME (64 800 payload Size) with SF-Pilots . 105
E.3.4.1 Bundled PLFRAME (64 800 payload) Definition . 106
E.3.4.2 PLHEADER Specification for Bundled PLFRAMEs (64 800 payload) . 107
E.3.4.3 SF-Pilot Structure . 109
E.3.5 Format Specification 3: Bundled PLFRAME (16 200 Payload Size) with SF-Pilots. 110
E.3.5.1 Bundled PLFRAME Definition . 111
E.3.5.2 PLHEADER Specification for Short Bundled PLFRAME. 112
E.3.5.3 SF-Pilot Structure . 113
E.3.6 Format Specification 4: Flexible Format with VL-SNR PLH tracking . 114
E.3.6.1 Super-Frame Header (SFH) . 115
E.3.6.2 SFH-Trailer (ST) . 116
E.3.6.3 Physical Layer Header (PLH) . 117
E.3.6.3.1 PLSCODE Definition. 117
E.3.6.3.2 PLH Protection Levels . 117
E.3.6.3.3 Signalling of MOD/COD/SPREAD and TYPE . 118
ETSI
5 ETSI EN 302 307-2 V1.1.1 (2015-02)
E.3.6.3.4 Field for ISI or SID or TSN . 119
E.3.6.3.5 SOF Sequence . 119
E.3.6.4 PLFRAME structure . 120
E.3.6.5 Pilot structure . 120
E.3.6.5.1 SF-Pilots . 120
E.3.6.5.2 Special VL-SNR Pilots . 120
E.3.6.6 Spreading and Signalling Rules . 121
E.3.6.7 Dummy Frame Definition . 121
E.3.6.7.1 Dummy frames with deterministic content . 122
E.3.6.7.2 Dummy frames with arbitrary content . 122
E.3.7 Format Specifications 5 - 15: Reserved . 122
E.4 Signalling of additional reception quality parameters via return channel (Normative for
Interference Management at the Gateway). 123
Annex F: For future use . 125
Annex G: For future use . 126
Annex H (informative): Examples of possible use of the System . 127
H.1 Void . 127
H.2 Void . 127
H.3 Void . 127
H.4 Void . 127
H.5 Void . 127
H.6 Void . 127
H.7 Satellite transponder models for simulations . 127
H.8 Phase noise masks for simulations . 129
Annex I (normative): ACM Command . 130
Annex J: For future use . 131
Annex K: For future use . 132
Annex L: For future use . 133
Annex M (normative): Transmission format for wideband satellite transponders using time-
slicing (optional) . 134
History . 135

ETSI
6 ETSI EN 302 307-2 V1.1.1 (2015-02)
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: [phone]
Fax: [phone]
The Digital Video Broadcasting 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 that 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.
The present document is part 2 of a multi-part deliverable covering the optional extensions of the DVB-S2 system,
denoted "DVB-S2X", as identified below:
Part 1: "DVB-S2";
Part 2: "DVB-S2 Extensions (DVB-S2X)".

National transposition dates
Date of adoption of this EN: 13 February 2015
Date of latest announcement of this EN (doa): 31 May 2015
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 November 2015
Date of withdrawal of any conflicting National Standard (dow): 30 November 2015

ETSI
7 ETSI EN 302 307-2 V1.1.1 (2015-02)
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "may not", "need", "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.
Introduction
The optional extensions of the S2 system have been approved in 2014 and are identified by the S2X denomination.
Such extensions are non-backwards-compatible with EN 302 307 (V1.1.1) [4], are optional for the implementation of
new receivers under EN 302 307-1 [3], but are normative for the implementation of receivers under the present
document: mapping of specific S2X building blocks to application areas is specified in Table 1. For every S2X
application area, as defined in Table 1, the configurations for the corresponding S2 application area, as defined in
EN 302 307-1 [3], Table 1, will be implemented. In case of conflicts the definition of the S2X application area applies.
The present document targets the core application areas of S2 (Digital Video Broadcasting, forward link for interactive
services using ACM, Digital Satellite News Gathering and professional digital links such as video point-to-point or
Internet trunking links), and new application areas requiring very-low carrier-to-noise and carrier-to-interference
operation (VL-SNR).
In particular for DTH, a possible use case is the launch of UHDTV-1 (e.g. 4k) television services in Ku-/Ka-band that
will adopt HEVC encoding. In this context it may be desirable to eventually use fragments of smaller blocks of capacity
on two or three DTH transponders and bond them into one logical stream. This permits to maximize capacity
exploitation by avoiding the presence of spare capacity in individual transponders and/or to take maximum advantage of
statistical multiplexing.
The S2X system offers the ability to operate with very-low carrier-to-noise and carrier-to-interference ratios (SNR
down to -10 dB), to serve markets such as airborne (business jets), maritime, civil aviation internet access, VSAT
terminals at higher frequency ranges or in tropical zones, small portable terminals for journalists and other
professionals. Furthermore, the S2X system provides transmission modes offering significantly higher capacity and
efficiency to serve professional links characterized by very-high carrier-to-noise and carrier-to-interference ratios
conditions.
The present document reuses the S2 system architecture, while adding finer MODCOD steps, sharper roll-off filtering,
technical means for bonding of multiple transponders and additional signalling capacity by means of an optional
periodic super-frame structure, extended PLHEADER signalling schemes and the support of GSE-Lite signals.
The present document maintains the same clause numbering as EN 302 307-1 [3], in order to facilitate cross-reference.
ETSI
8 ETSI EN 302 307-2 V1.1.1 (2015-02)
1 Scope
The present document specifies the optional extensions of the S2 system, identified by the S2X denomination.
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] ETSI TS 101 545-1 (V1.1.1): "Digital Video Broadcasting (DVB);Second Generation DVB
Interactive Satellite System (DVB-RCS2); Part 1: Overview and System Level specification".
[2] ETSI TS 102 606-1 (V1.2.1): "Digital Video Broadcasting (DVB); Generic Stream Encapsulation
(GSE); Part 1: Protocol".
[3] ETSI EN 302 307-1: "Digital Video Broadcasting (DVB); Second generation framing structure,
channel coding and modulation systems for Broadcasting, Interactive Services, News Gathering
and other broadband satellite applications; Part 1: DVB-S2".
[4] ETSI EN 302 307 (V1.1.1): "Digital Video Broadcasting (DVB); Second generation framing
structure, channel coding and modulation systems for Broadcasting, Interactive Services, News
Gathering and other broadband satellite applications".
[5] ETSI EN 300 468: "Digital Video Broadcasting (DVB); Specification for Service Information (SI)
in DVB systems".
[6] ETSI TS 102 606-2: "Digital Video Broadcasting (DVB); Generic Stream Encapsulation (GSE);
Part 2: Logical Link Control (LLC)".
[7] ETSI ETS 300 801: "Digital Video Broadcasting (DVB); Interaction channel through Public
Switched Telecommunications Network (PSTN)/ Integrated Services Digital Networks (ISDN)".
[8] ETSI EN 301 195: "Digital Video Broadcasting (DVB); Interaction channel through the Global
System for Mobile communications (GSM)".
[9] ETSI ES 200 800: "Digital Video Broadcasting (DVB); DVB interaction channel for Cable TV
distribution systems (CATV)".
[10] ETSI ETS 300 802: "Digital Video Broadcasting (DVB); Network-independent protocols for DVB
interactive services".
[11] ETSI EN 301 790: "Digital Video Broadcasting (DVB); Interaction channel for satellite
distribution systems".
ETSI
9 ETSI EN 302 307-2 V1.1.1 (2015-02)
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.
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.
Not applicable.
3 Symbols and abbreviations
3.1 Symbols
For the purposes of the present document, the symbols given in EN 302 307-1 [3] apply.
3.2 Abbreviations
For the purposes of the present document, the abbreviations given in EN 302 307-1 [3] and the following apply:
128APSK 128-ary Amplitude and Phase Shift Keying
256APSK 256-ary Amplitude and Phase Shift Keying
64APSK 64-ary Amplitude and Phase Shift Keying
BPSK Binary Phase Shift Keying
CU Capacity Unit
GSE Generic Stream Encapsulation
GSE-HEM Generic Stream Encapsulation - High Efficiency Mode
HEVC High Efficiency Video Coding
SF Super-Frame
SFFI Super-Frame Format Indicator
SFH Super-Frame Header
SOSF Start Of Super-Frame
ST Super-Frame header Trailer
UHDTV Ultra High Definition TeleVision
VL-SNR Very Low - Signal to Noise Ratio
4 Transmission system description
See EN 302 307-1 [3], clause 4.
4.1 System definition
See EN 302 307-1 [3], clause 4.1.
4.2 System architecture
See EN 302 307-1 [3], clause 4.2.
The present document reuses the S2 system architecture as described in EN 302 307-1 [3], Figure 1, while adding finer
MODCOD steps, sharper roll-off filtering, technical means allowing time-slicing of wide-band signals (for a reduced
processing speed in the receiver), technical means for bonding of multiple transponders, among other technologies.
ETSI
10 ETSI EN 302 307-2 V1.1.1 (2015-02)
Additional signalling capacity is provided:
• an optional periodic super-frame structure with signalling of the format of the super-frame content and further
benefits like simplifying synch recovery at VL-SNR and allowing periodic pilot structures and PL-Scramblers;
• an extended PLHEADER signalling scheme to support the additional MODCODs;
• an extended PLHEADER signalling scheme to support Mobile Frames (VL-SNR);
• a high-efficiency BBFRAME mode (GSE-HEM), similar to the T2 and C2 systems, to transport
GSE/GSE-Lite packets;
• signalling of streams which are GSE-Lite compliant.
4.3 System configurations
See EN 302 307-1 [3], clause 4.3.
Table 1 associates the S2X system elements to the applications areas. All elements in Table 1 are optional in
transmitting and receiving equipment complying with the S2 specification. At least "Normative" subsystems and
functionalities shall be implemented in the transmitting and receiving equipment to comply with the present document
for a specific application area.
ETSI
11 ETSI EN 302 307-2 V1.1.1 (2015-02)
Table 1: S2X System configurations and application areas
System configurations Broadcast Interactive DSNG Professional VL-SNR
services services services
FECFRAME (normal) 64 800 (bits)
(see MODCODs
below)
QPSK 1/4,1/3, 2/5 N N N N N
(S2-MODCODs)
1/2, 3/5, 2/3, 3/4, 4/5, 5/6, N N N N N
8/9, 9/10
(S2-MODCODs)
13/45 N N N N N
9/20; 11/20 N N N N N
8PSK 3/5, 2/3, 3/4, 5/6, 8/9, 9/10 N
N N N N
(S2-MODCODs)
23/36; 25/36; 13/18 N N N N N
8APSK-L (note 7) 5/9;26/45 N N N N N
16APSK 2/3, 3/4, 4/5, 5/6, 8/9, 9/10 N N N N N
(S2-MODCODs)
26/45; 3/5; 28/45; 23/36; 25/36; N N N N N
13/18; 7/9; 77/90
16APSK-L (note 7) 5/9; 8/15; 1/2; 3/5; 2/3 N N N N N
32APSK 3/4, 4/5, 5/6, 8/9, 9/10 N N N N N
(S2-MODCODs)
32/45; 11/15; 7/9 N N N N N
32APSK-L (note 7) 2/3 N N N N N
64APSK 11/15; 7/9; 4/5; 5/6 O N N N O
64APSK-L (note 7) 32/45 O N N N O
128APSK 3/4; 7/9 NA O O N NA
256APSK 32/45; 3/4 NA O O N NA
256APSK-L (note 7) 29/45; 2/3; 31/45; 11/15 NA O O N NA

FECFRAME (short) 16 200 (bits)
(see MODCODs
below)
ETSI
12 ETSI EN 302 307-2 V1.1.1 (2015-02)
System configurations Broadcast Interactive DSNG Professional VL-SNR
services services services
QPSK 1/4,1/3, 2/5 NA N O N N
(S2-MODCODs)
1/2, 3/5, 2/3, 3/4, 4/5, 5/6, NA N O N N
8/9
(S2-MODCODs)
11/45; 4/15; 14/45; 7/15 8/15; NA N O N N
32/45
8PSK 3/5, 2/3, 3/4, 5/6, 8/9 N
NA N O N
(S2-MODCODs)
7/15; 8/15; 26/45; 32/45 NA N O N N
16APSK 2/3, 3/4, 4/5, 5/6, 8/9 NA N O N N
(S2-MODCODs)
7/15; 8/15; 26/45; 3/5; 32/45 NA N O N N
32APSK 3/4, 4/5, 5/6, 8/9 NA N O N N
(S2-MODCODs)
2/3; 32/45 NA N O N N
VL-SNR Header O O O NA N
(see MODCODs
below) (note 1)
QPSK 2/9 (normal) NA O O NA N
BPSK 1/5; 4/15; 1/3 (short) NA O O NA N
1/5; 11/45; 1/3 (medium)
BPSK-S 1/5; 11/45 (short) NA O O NA N
Spreading Factor 2
Super-frame NA O O O O
Part 2 PLHEADER 8-bits N N N N N
(note 5)
Extended PLHEADER 8+8 bits (time slicing) O O NA O O
For Wide-band mode
(note 5)
GSE-High Efficiency For GSE/GSE-Lite N N N N N
Mode (note 6)
Roll-off 0,15; 0,10 and N N N N N
0,05
Channel bonding N NA NA O NA
(note 2) (note 3)
ETSI
13 ETSI EN 302 307-2 V1.1.1 (2015-02)
System configurations Broadcast Interactive DSNG Professional VL-SNR
services services services
VCM N N N N N
(note 4)
ACM NA N O O N
N = normative, O = optional, NA = not applicable.
NOTE 1: Ability to skip VL-SNR frames: Normative.
NOTE 2: Requires Input Stream Synchronizer, Null-Packet Deletion and Dummy Frame insertion.
NOTE 3: Normative for broadcast services in case of optional multiple tuner receivers.
NOTE 4: Any S2X receiver shall be able to recognize the whole set of MODCODS within the PLHeader and skip the XFECFrame if the
MODCOD is not supported.
NOTE 5: Part 2 PLHEADER and Extended PLHEADER for wideband transponders (Part 1 [3] or Part 2, annex M) cannot coexist in the
same carrier but either can coexist with the VL-SNR header.
NOTE 6: GSE is optional while support for GSE-Lite in GSE-HEM is normative across all the services.
NOTE 7: xxx-L= MODCODs optimized for quasi-linear channels.

ETSI
14 ETSI EN 302 307-2 V1.1.1 (2015-02)
Within the present document, a number of configurations and mechanisms are defined as "Optional". Configurations
and mechanisms explicitly indicated as "optional" within the present document, for a given application area, need not be
implemented in the equipment to comply with the present document. Nevertheless, when an "optional" mode or
mechanism is implemented, it shall comply with the specification as given in the present document.
5 Subsystems specifications
5.1 Mode adaptation
See EN 302 307-1 [3], clause 5.1.
According to Figure 3, the input sequence(s) is (are):
• Single or multiple Transport Streams (TS).
• Single or multiple Generic Streams (packetized, continuous or high-efficiency mode (HEM) packetized).
The output sequence is a BBHEADER (80 bits) followed by a DATA FIELD.
5.1.1 Input Interfaces
See EN 302 307-1 [3], clause 5.1.1.
An efficient input interface has been introduced as GSE-HEM. For details of GSE-HEM, see clause 5.1.7.
5.1.2 Input stream synchronizer (optional, not relevant for single TS - BS)
See EN 302 307-1 [3], clause 5.1.2.
5.1.3 Null-Packet Deletion (ACM and Transport Stream only)
See EN 302 307-1 [3], clause 5.1.3.
5.1.4 CRC-8 encoder (for packetized streams only)
See EN 302 307-1 [3], clause 5.1.4.
5.1.5 Merger/Slicer
See EN 302 307-1 [3], clause 5.1.5.
5.1.6 Base-Band Header insertion
See EN 302 307-1 [3], clause 5.1.6.
First byte (MATYPE-1):
• TS/GS field (2 bits): Transport Stream Input, Generic Stream Input (packetized or continuous) or GSE-HEM.
• SIS/MIS field (1 bit): Single Input Stream or Multiple Input Stream.
• CCM/ACM field (1 bit): Constant Coding and Modulation or Adaptive Coding and Modulation (VCM is
signalled as ACM).
• ISSYI (1 bit), (Input Stream Synchronization Indicator): If ISSYI = 1 = active, the ISSY field (see annex D) is
inserted after UPs or in the baseband header in GSE-HEM.
• For TS input mode:
- NPD (1 bit): Null-packet deletion active/not active.
ETSI
15 ETSI EN 302 307-2 V1.1.1 (2015-02)
• For GSE/Generic Continuous/Generic Packetized modes:
- GSE-Lite (1 bit): GSE stream is GSE-Lite compliant/non-compliant.
• RO (2 bits): Transmission Roll-off factor (α). Three additional roll-off factors shall be available, 0,15; 0,10
and 0,05. Signalling shall be according to the following rule (Table 2):
- If RO bits are signalled consistently from BBHEADER to BBHEADER as either 00, 01, 10 the
backward compatible definition (High roll-off range) applies:
00 = 0,35
01 = 0,25
10 = 0,20
- If RO bits are signalled from BBHEADER to BBHEADER in an alternating way with 11 then their
interpretation shall be Low roll-off range:
00 = 0,15
01 = 0,10
10 = 0,05
It shall be ensured that in a Multiple Input Stream configuration (SIS/MIS field = 0) alternation is
unambiguously evident over all Input Streams (for every ISI) and MODCOD combinations, such that any
receiver will receive regular alternation. Any receiver, once locked will switch to low roll-off range on first
detection of '11'.
Table 2 (see EN 302 307-1 [3], Table 3): MATYPE-1 field mapping
TS/GS SIS/MIS CCM/ACM ISSYI NPD/GSE-Lite RO
No
Alternation Alternation
with 11 = with 11 =
high roll- low roll-off
off range range
11 = Transport 1 = single 1 = CCM 1 = active 1 = active
00 = 0,35 00 = 0,15
00 = Generic Packetized 0 = multiple 0 = ACM 0 = not-active 0 = not-active
01 = 0,25 01 = 0,10
01 = Generic continuous
10 = 0,20 10 = 0,05
10 = GSE-HEM
NOTE: GSE-Lite signals are defined in annex D of TS 102 606-1 [2].
5.1.7 GSE High Efficiency Mode (GSE-HEM)
GSE variable-length or constant length UPs may be transmitted in GSE-HEM. In GSE-HEM, slicing of GSE packets is
performed and SYNCD shall always be computed. The receiver may derive the length of the UPs from the packet
header, therefore UPL transmission in BBHEADER is not performed. UPs shall not be sliced when there is a
BBFRAME from a different stream following, splitting is only possible with the immediately following BBFRAME.
The optional ISSY field is transmitted in the BBHEADER.
The Mode Adaptation unit shall perform the following sequence of operations (see Figure 1):
• Optional input stream synchronization (see EN 302 307-1 [3], clause D.2) relevant to the first transmitted UP
which starts in the data field; ISSY field inserted in the UPL and SYNC fields of the BBHEADER.
• Null-packet Deletion and CRC-8 at UP level shall not be computed nor inserted.
• SYNCD computation (pointing at the first bit of the first transmitted UP which starts in the Data Field) and
storage in BBHEADER. The transmitted UP corresponds exactly to the original UP itself. Hence SYNCD
points to the first bit of the original UP.
• UPL not computed nor transmitted.
ETSI
16 ETSI EN 302 307-2 V1.1.1 (2015-02)
th
• GSE-Lite compliance of the stream shall be signalled in the 6 bit of the MATYPE-1 field. GSE-Lite=1 means
a GSE-Lite compliant signal is transmitted. GSE-Lite=0 means that the transmitted GSE stream may not meet
the definition of a GSE-Lite signal.

UPL (in GSE Headers)
Time
GSE
UP    UP UP        UP UP
User Packet
SYNCD
80 bits
DFL
BBHEADER DATA FIELD
MATYPE ISSY DFL ISSY SYNCD CRC-8
(2 bytes)
(2 bytes) (2 MSB) (2 bytes) (1 LSB) MODE (1 byte)
Optional
Figure 1: Stream format at the output of the MODE ADAPTER, High Efficiency Mode for GSE
(no CRC-8 computed for UPs, optional single ISSY inserted
in the BBHEADER, UPL not transmitted)
5.1.8 Channel bonding for multi-tuner (L) receivers
5.1.8.1 Introduction to channel bonding
The present document provides tools to implement "channel bonding", where a single input stream is carried in parallel
over L transponders. The
...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.VWRULWYH'9%6;Digital Video Broadcasting (DVB) - Second generation framing structure, channel coding and modulation systems for Broadcasting, Interactive Services, News Gathering and other broadband satellite applications - Part 2: DVB-S2 Extensions (DVB-S2X)33.170Televizijska in radijska difuzijaTelevision and radio broadcastingICS:Ta slovenski standard je istoveten z:EN 302 307-2 Version 1.1.1SIST EN 302 307-2 V1.1.1:2015en01-oktober-2015SIST EN 302 307-2 V1.1.1:2015SLOVENSKI
STANDARD
ETSI EN 30Digital VidSecond generation framodulation Interactive Seother broadbPart 2: DVB
EUROPEAN STANDARD
302 307-2 V1.1.1 (201ideo Broadcasting (DVB); framing structure, channel con systems for Broadcasting, Services, News Gathering anddband satellite applications; B-S2 Extensions (DVB-S2X) 2015-02) coding and ,
nd ;
ETSI ETSI EN 302 307-2 V1.1.1 (2015-02)2
Reference DEN/JTC-DVB-341-2 Keywords BSS, digital, DVB, modulation, satellite, TV 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 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 302 307-2 V1.1.1:2015

ETSI ETSI EN 302 307-2 V1.1.1 (2015-02)3 Contents Intellectual Property Rights . 6 Foreword . 6 Modal verbs terminology . 7 Introduction . 7 1 Scope . 8 2 References . 8 2.1 Normative references . 8 2.2 Informative references . 9 3 Symbols and abbreviations . 9 3.1 Symbols . 9 3.2 Abbreviations . 9 4 Transmission system description . 9 4.1 System definition . 9 4.2 System architecture . 9 4.3 System configurations . 10 5 Subsystems specifications . 14 5.1 Mode adaptation . 14 5.1.1 Input Interfaces . 14 5.1.2 Input stream synchronizer (optional, not relevant for single TS - BS) . 14 5.1.3 Null-Packet Deletion (ACM and Transport Stream only) . 14 5.1.4 CRC-8 encoder (for packetized streams only) . 14 5.1.5 Merger/Slicer . 14 5.1.6 Base-Band Header insertion . 14 5.1.7 GSE High Efficiency Mode (GSE-HEM) . 15 5.1.8 Channel bonding for multi-tuner (L) receivers . 16 5.1.8.1 Introduction to channel bonding . 16 5.1.8.2 Channel bonding for TS transmission . 16 5.1.8.3 Channel bonding for GSE transmission . 18 5.2 Stream Adaptation . 19 5.2.1 Padding . 19 5.2.2 BB scrambling . 19 5.3 FEC Encoding . 19 5.3.1 Outer encoding (BCH) . 21 5.3.2 Inner encoding (LDPC) . 21 5.3.2.1 Inner coding for normal FECFRAME. 21 5.3.2.2 Inner coding for short and medium FECFRAME . 22 5.3.3 Bit interleaver . 22 5.4 Constellations and Bit mapping. 24 5.4.0 Bit mapping into π/2BPSK constellation (VL-SNR modes) . 24 5.4.1 Bit mapping into QPSK constellation . 24 5.4.2 Bit mapping into 8PSK and 8APSK constellations . 24 5.4.3 Bit mapping into 16APSK constellation . 25 5.4.4 Bit mapping into 32APSK constellations . 27 5.4.5 Bit mapping into 64APSK constellations . 29 5.4.6 Bit mapping into 128APSK constellations . 33 5.4.7 Bit mapping into 256APSK constellations . 34 5.5 Physical Layer (PL) framing . 40 5.5.1 Dummy PLFRAME insertion . 41 5.5.2 PL signalling . 41 5.5.2.1 SOF field . 43 5.5.2.2 MODCOD field . 43 5.5.2.3 TYPE field . 45 5.5.2.4 PLS code, no time slicing . 45 SIST EN 302 307-2 V1.1.1:2015

ETSI ETSI EN 302 307-2 V1.1.1 (2015-02)4 5.5.2.5 VL-SNR Header . 46 5.5.2.6 Shortening and Puncturing of VL-SNR MODCODs . 47 5.5.3 Pilot Insertion. 48 5.5.4 Physical layer scrambling . 48 5.5.4.1 PL scrambling for VL-SNR frames . 49 5.5.4.1.1 π/2-BPSK modulated frames . 49 5.6 Baseband shaping and quadrature modulation . 49 6 Error performance . 50 Annex A (normative): Signal spectrum at the modulator output . 52 Annex B (normative): Addresses of parity bit accumulators for nldpc = 64 800 . 54 Annex C (normative): Addresses of parity bit accumulators for nldpc = 16 200 and nldpc = 32 400 . 91 Annex D (normative): Additional tools . 95 D.1 Implementation of TS based channel bonding . 95 D.1.1 Transmitting side . 95 D.1.2 Receiving side (informative) . 95 D.2 Void . 95 D.3 Void . 95 D.4 Void . 95 D.5 Signalling of reception quality via return channel (Normative for ACM) . 96 Annex E (normative): Super-Framing Structure (optional) . 98 E.1 Purpose of Super-Framing Structure . 98 E.2 Specification of Super-Frame as a Container . 98 E.2.1 Super-Frame Structure . 98 E.2.2 Start of Super-Frame (SOSF) Field . 99 E.2.3 Super-Frame Format Indicator (SFFI) Field. 99 E.2.4 Two-Way Scrambling . 100 E.2.4.1 Scrambling Sequence Generation . 100 E.2.4.2 Two-Way Scrambling Method . 101 E.3 Format Specifications as Super-Frame Content . 102 E.3.1 Super-Frame-aligned Pilots (SF-Pilots). 102 E.3.1.1 Specification of SF-Pilots Type A . 103 E.3.2 Format Specification 0: DVB-S2X. 103 E.3.2.1 Pilot structure . 104 E.3.2.2 Modified VL-SNR-frame . 104 E.3.3 Format Specification 1: DVB-S2 legacy . 105 E.3.4 Format Specification 2: Bundled PLFRAME (64 800 payload Size) with SF-Pilots . 105 E.3.4.1 Bundled PLFRAME (64 800 payload) Definition . 106 E.3.4.2 PLHEADER Specification for Bundled PLFRAMEs (64 800 payload) . 107 E.3.4.3 SF-Pilot Structure . 109 E.3.5 Format Specification 3: Bundled PLFRAME (16 200 Payload Size) with SF-Pilots. 110 E.3.5.1 Bundled PLFRAME Definition . 111 E.3.5.2 PLHEADER Specification for Short Bundled PLFRAME. 112 E.3.5.3 SF-Pilot Structure . 113 E.3.6 Format Specification 4: Flexible Format with VL-SNR PLH tracking . 114 E.3.6.1 Super-Frame Header (SFH) . 115 E.3.6.2 SFH-Trailer (ST) . 116 E.3.6.3 Physical Layer Header (PLH) . 117 E.3.6.3.1 PLSCODE Definition. 117 E.3.6.3.2 PLH Protection Levels . 117 E.3.6.3.3 Signalling of MOD/COD/SPREAD and TYPE . 118 SIST EN 302 307-2 V1.1.1:2015

ETSI ETSI EN 302 307-2 V1.1.1 (2015-02)5 E.3.6.3.4 Field for ISI or SID or TSN . 119 E.3.6.3.5 SOF Sequence . 119 E.3.6.4 PLFRAME structure . 120 E.3.6.5 Pilot structure . 120 E.3.6.5.1 SF-Pilots . 120 E.3.6.5.2 Special VL-SNR Pilots . 120 E.3.6.6 Spreading and Signalling Rules . 121 E.3.6.7 Dummy Frame Definition . 121 E.3.6.7.1 Dummy frames with deterministic content . 122 E.3.6.7.2 Dummy frames with arbitrary content . 122 E.3.7 Format Specifications 5 - 15: Reserved . 122 E.4 Signalling of additional reception quality parameters via return channel (Normative for Interference Management at the Gateway). 123 Annex F: For future use . 125 Annex G: For future use . 126 Annex H (informative): Examples of possible use of the System . 127 H.1 Void . 127 H.2 Void . 127 H.3 Void . 127 H.4 Void . 127 H.5 Void . 127 H.6 Void . 127 H.7 Satellite transponder models for simulations . 127 H.8 Phase noise masks for simulations . 129 Annex I (normative): ACM Command . 130 Annex J: For future use . 131 Annex K: For future use . 132 Annex L: For future use . 133 Annex M (normative): Transmission format for wideband satellite transponders using time-slicing (optional) . 134 History . 135
ETSI ETSI EN 302 307-2 V1.1.1 (2015-02)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 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: [phone] Fax: [phone]
The Digital Video Broadcasting 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 that 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. The present document is part 2 of a multi-part deliverable covering the optional extensions of the DVB-S2 system, denoted "DVB-S2X", as identified below: Part 1: "DVB-S2"; Part 2: "DVB-S2 Extensions (DVB-S2X)".
National transposition dates Date of adoption of this EN: 13 February 2015 Date of latest announcement of this EN (doa): 31 May 2015 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
30 November 2015 Date of withdrawal of any conflicting National Standard (dow): 30 November 2015
ETSI ETSI EN 302 307-2 V1.1.1 (2015-02)7 Modal verbs terminology In the present document "shall", "shall not", "should", "should not", "may", "may not", "need", "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. Introduction The optional extensions of the S2 system have been approved in 2014 and are identified by the S2X denomination. Such extensions are non-backwards-compatible with EN 302 307 (V1.1.1) [4], are optional for the implementation of new receivers under EN 302 307-1 [3], but are normative for the implementation of receivers under the present document: mapping of specific S2X building blocks to application areas is specified in Table 1. For every S2X application area, as defined in Table 1, the configurations for the corresponding S2 application area, as defined in EN 302 307-1 [3], Table 1, will be implemented. In case of conflicts the definition of the S2X application area applies. The present document targets the core application areas of S2 (Digital Video Broadcasting, forward link for interactive services using ACM, Digital Satellite News Gathering and professional digital links such as video point-to-point or Internet trunking links), and new application areas requiring very-low carrier-to-noise and carrier-to-interference operation (VL-SNR). In particular for DTH, a possible use case is the launch of UHDTV-1 (e.g. 4k) television services in Ku-/Ka-band that will adopt HEVC encoding. In this context it may be desirable to eventually use fragments of smaller blocks of capacity on two or three DTH transponders and bond them into one logical stream. This permits to maximize capacity exploitation by avoiding the presence of spare capacity in individual transponders and/or to take maximum advantage of statistical multiplexing. The S2X system offers the ability to operate with very-low carrier-to-noise and carrier-to-interference ratios (SNR down to -10 dB), to serve markets such as airborne (business jets), maritime, civil aviation internet access, VSAT terminals at higher frequency ranges or in tropical zones, small portable terminals for journalists and other professionals. Furthermore, the S2X system provides transmission modes offering significantly higher capacity and efficiency to serve professional links characterized by very-high carrier-to-noise and carrier-to-interference ratios conditions. The present document reuses the S2 system architecture, while adding finer MODCOD steps, sharper roll-off filtering, technical means for bonding of multiple transponders and additional signalling capacity by means of an optional periodic super-frame structure, extended PLHEADER signalling schemes and the support of GSE-Lite signals.
The present document maintains the same clause numbering as EN 302 307-1 [3], in order to facilitate cross-reference. SIST EN 302 307-2 V1.1.1:2015

ETSI ETSI EN 302 307-2 V1.1.1 (2015-02)8 1 Scope The present document specifies the optional extensions of the S2 system, identified by the S2X denomination. 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] ETSI TS 101 545-1 (V1.1.1): "Digital Video Broadcasting (DVB);Second Generation DVB Interactive Satellite System (DVB-RCS2); Part 1: Overview and System Level specification". [2] ETSI TS 102 606-1 (V1.2.1): "Digital Video Broadcasting (DVB); Generic Stream Encapsulation (GSE); Part 1: Protocol". [3] ETSI EN 302 307-1: "Digital Video Broadcasting (DVB); Second generation framing structure, channel coding and modulation systems for Broadcasting, Interactive Services, News Gathering and other broadband satellite applications; Part 1: DVB-S2". [4] ETSI EN 302 307 (V1.1.1): "Digital Video Broadcasting (DVB); Second generation framing structure, channel coding and modulation systems for Broadcasting, Interactive Services, News Gathering and other broadband satellite applications". [5] ETSI EN 300 468: "Digital Video Broadcasting (DVB); Specification for Service Information (SI) in DVB systems". [6] ETSI TS 102 606-2: "Digital Video Broadcasting (DVB); Generic Stream Encapsulation (GSE); Part 2: Logical Link Control (LLC)". [7] ETSI ETS 300 801: "Digital Video Broadcasting (DVB); Interaction channel through Public Switched Telecommunications Network (PSTN)/ Integrated Services Digital Networks (ISDN)". [8] ETSI EN 301 195: "Digital Video Broadcasting (DVB); Interaction channel through the Global System for Mobile communications (GSM)". [9] ETSI ES 200 800: "Digital Video Broadcasting (DVB); DVB interaction channel for Cable TV distribution systems (CATV)". [10] ETSI ETS 300 802: "Digital Video Broadcasting (DVB); Network-independent protocols for DVB interactive services". [11] ETSI EN 301 790: "Digital Video Broadcasting (DVB); Interaction channel for satellite distribution systems". SIST EN 302 307-2 V1.1.1:2015

ETSI ETSI EN 302 307-2 V1.1.1 (2015-02)9 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. 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. Not applicable. 3 Symbols and abbreviations 3.1 Symbols For the purposes of the present document, the symbols given in EN 302 307-1 [3] apply. 3.2 Abbreviations For the purposes of the present document, the abbreviations given in EN 302 307-1 [3] and the following apply: 128APSK 128-ary Amplitude and Phase Shift Keying 256APSK 256-ary Amplitude and Phase Shift Keying 64APSK 64-ary Amplitude and Phase Shift Keying BPSK Binary Phase Shift Keying CU Capacity Unit GSE Generic Stream Encapsulation GSE-HEM Generic Stream Encapsulation - High Efficiency Mode HEVC High Efficiency Video Coding SF Super-Frame SFFI Super-Frame Format Indicator SFH Super-Frame Header SOSF Start Of Super-Frame ST Super-Frame header Trailer UHDTV Ultra High Definition TeleVision VL-SNR Very Low - Signal to Noise Ratio 4 Transmission system description See EN 302 307-1 [3], clause 4. 4.1 System definition See EN 302 307-1 [3], clause 4.1. 4.2 System architecture See EN 302 307-1 [3], clause 4.2. The present document reuses the S2 system architecture as described in EN 302 307-1 [3], Figure 1, while adding finer MODCOD steps, sharper roll-off filtering, technical means allowing time-slicing of wide-band signals (for a reduced processing speed in the receiver), technical means for bonding of multiple transponders, among other technologies. SIST EN 302 307-2 V1.1.1:2015

ETSI ETSI EN 302 307-2 V1.1.1 (2015-02)10 Additional signalling capacity is provided:
• an optional periodic super-frame structure with signalling of the format of the super-frame content and further benefits like simplifying synch recovery at VL-SNR and allowing periodic pilot structures and PL-Scramblers; • an extended PLHEADER signalling scheme to support the additional MODCODs; • an extended PLHEADER signalling scheme to support Mobile Frames (VL-SNR); • a high-efficiency BBFRAME mode (GSE-HEM), similar to the T2 and C2 systems, to transport GSE/GSE-Lite packets; • signalling of streams which are GSE-Lite compliant. 4.3 System configurations See EN 302 307-1 [3], clause 4.3. Table 1 associates the S2X system elements to the applications areas. All elements in Table 1 are optional in transmitting and receiving equipment complying with the S2 specification. At least "Normative" subsystems and functionalities shall be implemented in the transmitting and receiving equipment to comply with the present document for a specific application area. SIST EN 302 307-2 V1.1.1:2015

ETSI ETSI EN 302 307-2 V1.1.1 (2015-02)11
Table 1: S2X System configurations and application areas System configurations Broadcast services Interactive services DSNG Professional services VL-SNR FECFRAME (normal) (see MODCODs below) 64 800 (bits)
QPSK 1/4,1/3, 2/5 (S2-MODCODs) N N N N N 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9, 9/10 (S2-MODCODs) N N N N N 13/45 N N N N N 9/20; 11/20 N N N N N 8PSK 3/5, 2/3, 3/4, 5/6, 8/9, 9/10 (S2-MODCODs) N N N N N 23/36; 25/36; 13/18 N N N N N 8APSK-L (note 7) 5/9;26/45 N N N N N 16APSK 2/3, 3/4, 4/5, 5/6, 8/9, 9/10 (S2-MODCODs) N N N N N 26/45; 3/5; 28/45; 23/36; 25/36; 13/18; 7/9; 77/90 N N N N N 16APSK-L (note 7) 5/9; 8/15; 1/2; 3/5; 2/3 N N N N N 32APSK 3/4, 4/5, 5/6, 8/9, 9/10
(S2-MODCODs) N
N N N N 32/45; 11/15; 7/9 N N N N N 32APSK-L (note 7) 2/3 N N N N N 64APSK 11/15; 7/9; 4/5; 5/6 O N N N O 64APSK-L (note 7) 32/45 O N N N O 128APSK 3/4; 7/9 NA O O N NA 256APSK 32/45; 3/4 NA O O N NA 256APSK-L (note 7) 29/45; 2/3; 31/45; 11/15 NA O O N NA
FECFRAME (short) (see MODCODs below) 16 200 (bits)
ETSI ETSI EN 302 307-2 V1.1.1 (2015-02)12
System configurations Broadcast services Interactive services DSNG Professional services VL-SNR QPSK 1/4,1/3, 2/5 (S2-MODCODs) NA N O N N 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9 (S2-MODCODs) NA N O N N 11/45; 4/15; 14/45; 7/15 8/15; 32/45 NA N O N N 8PSK 3/5, 2/3, 3/4, 5/6, 8/9 (S2-MODCODs) NA N O N N 7/15; 8/15; 26/45; 32/45 NA N O N N 16APSK 2/3, 3/4, 4/5, 5/6, 8/9 (S2-MODCODs) NA N O N N 7/15; 8/15; 26/45; 3/5; 32/45 NA N O N N 32APSK 3/4, 4/5, 5/6, 8/9 (S2-MODCODs) NA N O N N 2/3; 32/45 NA N O N N
VL-SNR Header (see MODCODs below) (note 1)
O
O O NA
N QPSK 2/9 (normal) NA O O NA N BPSK
1/5; 4/15; 1/3 (short) 1/5; 11/45; 1/3 (medium) NA O O NA N BPSK-S Spreading Factor 2
1/5; 11/45 (short) NA O O NA N
Super-frame
NA O O O O Part 2 PLHEADER (note 5) 8-bits N N N N N Extended PLHEADER
For Wide-band mode (note 5) 8+8 bits (time slicing) O O NA O O GSE-High Efficiency Mode
For GSE/GSE-Lite (note 6) N N
N N N Roll-off 0,15; 0,10 and 0,05
N N N N N Channel bonding (note 2)
N (note 3) NA NA O NA SIST EN 302 307-2 V1.1.1:2015

ETSI ETSI EN 302 307-2 V1.1.1 (2015-02)13
System configurations Broadcast services Interactive services DSNG Professional services VL-SNR VCM (note 4)
N N N N N ACM
NA N O O N N = normative, O = optional, NA = not applicable.
NOTE 1: Ability to skip VL-SNR frames: Normative. NOTE 2: Requires Input Stream Synchronizer, Null-Packet Deletion and Dummy Frame insertion. NOTE 3: Normative for broadcast services in case of optional multiple tuner receivers. NOTE 4: Any S2X receiver shall be able to recognize the whole set of MODCODS within the PLHeader and skip the XFECFrame if the MODCOD is not supported. NOTE 5: Part 2 PLHEADER and Extended PLHEADER for wideband transponders (Part 1 [3] or Part 2, annex M) cannot coexist in the same carrier but either can coexist with the VL-SNR header. NOTE 6: GSE is optional while support for GSE-Lite in GSE-HEM is normative across all the services. NOTE 7: xxx-L= MODCODs optimized for quasi-linear channels.
ETSI ETSI EN 302 307-2 V1.1.1 (2015-02)14 Within the present document, a number of configurations and mechanisms are defined as "Optional". Configurations and mechanisms explicitly indicated as "optional" within the present document, for a given application area, need not be implemented in the equipment to comply with the present document. Nevertheless, when an "optional" mode or mechanism is implemented, it shall comply with the specification as given in the present document. 5 Subsystems specifications 5.1 Mode adaptation See EN 302 307-1 [3], clause 5.1. According to Figure 3, the input sequence(s) is (are): • Single or multiple Transport Streams (TS). • Single or multiple Generic Streams (packetized, continuous or high-efficiency mode (HEM) packetized). The output sequence is a BBHEADER (80 bits) followed by a DATA FIELD. 5.1.1 Input Interfaces See EN 302 307-1 [3], clause 5.1.1. An efficient input interface has been introduced as GSE-HEM. For details of GSE-HEM, see clause 5.1.7. 5.1.2 Input stream synchronizer (optional, not relevant for single TS - BS) See EN 302 307-1 [3], clause 5.1.2. 5.1.3 Null-Packet Deletion (ACM and Transport Stream only) See EN 302 307-1 [3], clause 5.1.3. 5.1.4 CRC-8 encoder (for packetized streams only) See EN 302 307-1 [3], clause 5.1.4. 5.1.5 Merger/Slicer See EN 302 307-1 [3], clause 5.1.5. 5.1.6 Base-Band Header insertion See EN 302 307-1 [3], clause 5.1.6. First byte (MATYPE-1): • TS/GS field (2 bits): Transport Stream Input, Generic Stream Input (packetized or continuous) or GSE-HEM. • SIS/MIS field (1 bit): Single Input Stream or Multiple Input Stream. • CCM/ACM field (1 bit): Constant Coding and Modulation or Adaptive Coding and Modulation (VCM is signalled as ACM). • ISSYI (1 bit), (Input Stream Synchronization Indicator): If ISSYI = 1 = active, the ISSY field (see annex D) is inserted after UPs or in the baseband header in GSE-HEM. • For TS input mode: - NPD (1 bit): Null-packet deletion active/not active.
ETSI ETSI EN 302 307-2 V1.1.1 (2015-02)15 • For GSE/Generic Continuous/Generic Packetized modes: - GSE-Lite (1 bit): GSE stream is GSE-Lite compliant/non-compliant. • RO (2 bits): Transmission Roll-off factor (α). Three additional roll-off factors shall be available, 0,15; 0,10 and 0,05. Signalling shall be according to the following rule (Table 2): - If RO bits are signalled consistently from BBHEADER to BBHEADER as either 00, 01, 10 the backward compatible definition (High roll-off range) applies: 00 = 0,35
01 = 0,25
10 = 0,20
- If RO bits are signalled from BBHEADER to BBHEADER in an alternating way with 11 then their interpretation shall be Low roll-off range: 00 = 0,15
01 = 0,10
10 = 0,05 It shall be ensured that in a Multiple Input Stream configuration (SIS/MIS field = 0) alternation is unambiguously evident over all Input Streams (for every ISI) and MODCOD combinations, such that any receiver will receive regular alternation. Any receiver, once locked will switch to low roll-off range on first detection of '11'. Table 2 (see EN 302 307-1 [3], Table 3): MATYPE-1 field mapping TS/GS SIS/MIS CCM/ACM ISSYI NPD/GSE-Lite RO No Alternation with 11 = high roll-off range
Alternation with 11 = low roll-off range 11 = Transport 00 = Generic Packetized 01 = Generic continuous 10 = GSE-HEM 1 = single
0 = multiple 1 = CCM 0 = ACM 1 = active 0 = not-active 1 = active 0 = not-active 00 = 0,35 01 = 0,25 10 = 0,20 00 = 0,15 01 = 0,10 10 = 0,05
NOTE: GSE-Lite signals are defined in annex D of TS 102 606-1 [2]. 5.1.7 GSE High Efficiency Mode (GSE-HEM) GSE variable-length or constant length UPs may be transmitted in GSE-HEM. In GSE-HEM, slicing of GSE packets is performed and SYNCD shall always be computed. The receiver may derive the length of the UPs from the packet header, therefore UPL transmission in BBHEADER is not performed. UPs shall not be sliced when there is a BBFRAME from a different stream following, splitting is only possible with the immediately following BBFRAME. The optional ISSY field is transmitted in the BBHEADER. The Mode Adaptation unit shall perform the following sequence of operations (see Figure 1): • Optional input stream synchronization (see EN 302 307-1 [3], clause D.2) relevant to the first transmitted UP which starts in the data field; ISSY field inserted in the UPL and SYNC fields of the BBHEADER. • Null-packet Deletion and CRC-8 at UP level shall not be computed nor inserted. • SYNCD computation (pointing at the first bit of the first transmitted UP which starts in the Data Field) and storage in BBHEADER. The transmitted UP corresponds exactly to the original UP itself. Hence SYNCD points to the first bit of the original UP. • UPL not computed nor transmitted. SIST EN 302 307-2 V1.1.1:2015

ETSI ETSI EN 302 307-2 V1.1.1 (2015-02)16 • GSE-Lite compliance of the stream shall be signalled in the 6th bit of the MATYPE-1 field. GSE-Lite=1 means a GSE-Lite compliant signal is transmitted. GSE-Lite=0 means that the transmitted GSE stream may not meet the definition of a GSE-Lite signal.
Figure 1: Stream format at the output of the MODE ADAPTER, High Efficiency Mode for GSE (no CRC-8 computed for UPs, optional single ISSY inserted in the BBHEADER, UPL not transmitted) 5.1.8 Channel bonding for multi-tuner (L) receivers 5.1.8.1 Introduction to channel bonding The present document provides tools to implement "channel bonding", where a single input stream is carried in parallel over L transponders. The maximum number of bonded transponders shall be 3 (L ≤ 3). Channel bonding allows for example to avoid un-used capacity in a transponder in case of Constant Bit-Rate (CBR) video programmes, and /or to maximize the statistical multiplexing gain in case of Variable Bit-Rate (VBR) video programmes. The bonded channels shall lie in the same frequency band. Further, channel bonding shall use CCM only, and shall not be combined with wideband tuners (according to annex M of [3] and annex M). In the following subsections, channel bonding for TS transmission (clause 5.1.8.2) and for GSE (clause 5.1.8.3) will be described in more detail. 5.1.8.2
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