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1、 ETSI EN 302 307 V1.1.2 (2006-06) European Standard (Telecommunications series) Digital Video Broadcasting (DVB); Second generation framing structure, channel coding and modulation systems for Broadcasting, Interactive Services, News Gathering and other broadband satellite applications European Broa
2、dcasting Union Union Europenne de Radio-Tlvision EBUUER ETSI ETSI EN 302 307 V1.1.2 (2006-06) 2 Reference REN/JTC-DVB-196 Keywords BSS, modulation 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
3、Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice Individual copies of the present document can be downloaded from: http:/www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing
4、 or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document
5、 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 followin
6、g services: http:/portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2006. European Bro
7、adcasting Union 2006. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTM and the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for t
8、he benefit of its Members and of the 3GPP Organizational Partners. ETSI ETSI EN 302 307 V1.1.2 (2006-06) 3 Contents Intellectual Property Rights5 Foreword.5 1 Scope6 2 References8 3 Symbols and abbreviations.9 3.1 Symbols9 3.2 Abbreviations.10 4 Transmission system description11 4.1 System definitio
9、n11 4.2 System architecture 12 4.3 System configurations13 5 Subsystems specification14 5.1 Mode adaptation.14 5.1.1 Input interface.14 5.1.2 Input stream synchronizer (optional, not relevant for single TS - BS) .15 5.1.3 Null-Packet Deletion (ACM and Transport Stream only) 15 5.1.4 CRC-8 encoder (f
10、or packetized streams only)15 5.1.5 Merger/Slicer16 5.1.6 Base-Band Header insertion .17 5.2 Stream adaptation.18 5.2.1 Padding.19 5.2.2 BB scrambling19 5.3 FEC encoding.19 5.3.1 Outer encoding (BCH)20 5.3.2 Inner encoding (LDPC) 21 5.3.2.1 Inner coding for normal FECFRAME.22 5.3.2.2 Inner coding fo
11、r short FECFRAME23 5.3.3 Bit Interleaver (for 8PSK, 16APSK and 32APSK only).23 5.4 Bit mapping into constellation25 5.4.1 Bit mapping into QPSK constellation.25 5.4.2 Bit mapping into 8PSK constellation25 5.4.3 Bit mapping into 16APSK constellation.26 5.4.4 Bit mapping into 32APSK27 5.5 Physical Lay
12、er (PL) framing27 5.5.1 Dummy PLFRAME insertion.28 5.5.2 PL signalling.28 5.5.2.1 SOF field.29 5.5.2.2 MODCOD field.29 5.5.2.3 TYPE field29 5.5.2.4 PLS code.29 5.5.3 Pilots insertion30 5.5.4 Physical layer scrambling.30 5.6 Baseband shaping and quadrature modulation.32 6 Error performance33 Annex A
13、(normative): Signal spectrum at the modulator output34 Annex B (normative): Addresses of parity bit accumulators for nldpc = 64 80036 Annex C (normative): Addresses of parity bit accumulators for nldpc = 16 200.45 Annex D (normative): Additional Mode Adaptation and ACM tools.48 ETSI ETSI EN 302 307
14、V1.1.2 (2006-06) 4 D.1 “ACM Command“ signalling interface48 D.2 Input stream synchronizer48 D.3 Null-packet Deletion (normative for input transport streams and ACM).50 D.4 BBHEADER and Merging/slicing Policy for various application areas51 D.5 Signalling of reception quality via return channel (Norm
15、ative for ACM).52 Annex E (normative): SI and signal identification for DSNG and contribution applications54 Annex F (normative): Backwards Compatible modes (optional)55 Annex G (informative): Supplementary information on receiver implementation58 G.1 Carrier recovery58 G.2 FEC decoding.58 G.3 ACM:
16、Transport Stream regeneration and clock recovery using ISCR.61 G.4 Non linearity pre-compensation and Intersymbol Interference suppression techniques61 G.5 Interactive services using DVB-RCS return link: user terminal synchronization62 Annex H (informative): Examples of possible use of the System63
17、H.1 CCM digital TV broadcasting: bit rate capacity and C/N requirements63 H.2 Distribution of multiple TS multiplexes to DTT Transmitters (Multiple TS, CCM).65 H.3 SDTV and HDTV broadcasting with differentiated protection (VCM, Multiple TS) .66 H.4 DSNG Services using ACM (Single transport Stream, i
18、nformation rate varying in time)66 H.5 IP Unicast Services (Non-uniform protection on a user-by-user basis).67 H.6 Example performance of BC modes.69 H.7 Satellite transponder models for simulations .70 H.8 Phase noise masks for simulations.72 Annex I (informative): Bibliography.73 History74 ETSI ET
19、SI EN 302 307 V1.1.2 (2006-06) 5 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 S
20、R 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:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR
21、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
22、European Standard (Telecommunications series) has been produced by Joint Technical Committee (JTC) Broadcast of the European Broadcasting Union (EBU), Comit Europen de Normalisation ELECtrotechnique (CENELEC) and the European Telecommunications Standards Institute (ETSI). The work of the JTC was bas
23、ed on the studies carried out by the European DVB Project under the auspices of theAd Hoc Group on DVB-S2 of the DVB Technical Module. This joint group of industry, operators and broadcasters provided the necessary information on all relevant technical matters (see bibliography). NOTE: The EBU/ETSI
24、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
25、 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 Europ
26、ean 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 Founded in September 1993, the DVB Project is a market-led consortium of public and private sector organizations in the television
27、 industry. Its aim is to establish the framework for the introduction of MPEG-2 based digital television services. Now comprising over 200 organizations from more than 25 countries around the world, DVB fosters market-led systems, which meet the real needs, and economic circumstances, of the consume
28、r electronics and the broadcast industry. National transposition dates Date of latest announcement of this EN (doa): 30 September 2006 Date of latest publication of new National Standard or endorsement of this EN (dop/e): 31 March 2007 Date of withdrawal of any conflicting National Standard (dow): 3
29、1 March 2007 ETSI ETSI EN 302 307 V1.1.2 (2006-06) 6 1 Scope DVB-S (EN 300 421 2) was introduced as a standard in 1994 and DVB-DSNG (EN 301 210 3) in 1997. The DVB-S standard specifies QPSK modulation and concatenated convolutional and Reed-Solomon channel coding, and is now used by most satellite o
30、perators worldwide for television and data broadcasting services. DVB-DSNG specifies, in addition to DVB-S format, the use of 8PSK and 16QAM modulation for satellite news gathering and contribution services. Since 1997, digital satellite transmission technology has evolved somewhat: New channel codi
31、ng schemes, combined with higher order modulation, promise more powerful alternatives to the DVB-S/DVB-DSNG coding and modulation schemes. The result is a capacity gain in the order of 30 % at a given transponder bandwidth and transmitted EIRP, depending on the modulation type and code rate. Variabl
32、e Coding and Modulation (VCM) may be applied to provide different levels of error protection to different service components (e.g. SDTV and HDTV, audio, multimedia). In the case of interactive and point-to-point applications, the VCM functionality may be combined with the use of return channels, to
33、achieve Adaptive Coding and Modulation (ACM). This technique provides more exact channel protection and dynamic link adaptation to propagation conditions, targeting each individual receiving terminal. ACM systems promise satellite capacity gains of up to 100 %-200 %. In addition, service availabilit
34、y may be extended compared to a constant protection system (CCM) such as DVB-S or DVB-DSNG. Such gains are achieved by informing the satellite up-link station of the channel condition (e.g. C/N+I) of each receiving terminal via the satellite or terrestrial return channels. DVB-S and DVB-DSNG are str
35、ictly focused on a unique data format, the MPEG Transport Stream (ISO/IEC 13818-1 1 or a reference to it). Extended flexibility to cope with other input data formats (such as multiple Transport Streams, or generic data formats) is now possible without significant complexity increase. The present doc
36、ument defines a “second generation“ modulation and channel coding system (denoted the “System“ or “DVB-S2“ for the purposes of the present document) to make use of the improvements listed above. DVB-S2 is a single, very flexible standard, covering a variety of applications by satellite, as described
37、 below. It is characterized by: A flexible input stream adapter, suitable for operation with single and multiple input streams of various formats (packetized or continuous); a powerful FEC system based on LDPC (Low-Density Parity Check) codes concatenated with BCH codes, allowing Quasi-Error-Free op
38、eration at about 0,7dB to 1 dB from the Shannon limit, depending on the transmission mode (AWGN channel, modulation constrained Shannon limit); a wide range of code rates (from 1/4 up to 9/10); 4 constellations, ranging in spectrum efficiency from 2 bit/s/Hz to 5 bit/s/Hz, optimized for operation ov
39、er non-linear transponders; a set of three spectrum shapes with roll-off factors 0,35, 0,25 and 0,20; Adaptive Coding and Modulation (ACM) functionality, optimizing channel coding and modulation on a frame-by-frame basis. The System has been optimized for the following broadband satellite applicatio
40、ns: Broadcast Services (BS) Digital multi-programme Television (TV)/High Definition Television (HDTV) Broadcasting services to be used for primary and secondary distribution in the Fixed Satellite Service (FSS) and the Broadcast Satellite Service (BSS) bands. ETSI ETSI EN 302 307 V1.1.2 (2006-06) 7
41、DVB-S2 is intended to provide Direct-To-Home (DTH) services for consumer Integrated Receiver Decoder (IRD), as well as collective antenna systems (Satellite Master Antenna Television - SMATV) and cable television head-end stations (possibly with remodulation, see EN 300 429 6). DVB-S2 may be conside
42、red a successor to the current DVB-S standard EN 300 421 2, and may be introduced for new services and allow for a long-term migration. BS services are transported in MPEG Transport Stream format. VCM may be applied on multiple transport stream to achieve a differentiated error protection for differ
43、ent services (TV, HDTV, audio, multimedia). Two modes are available: NBC-BS (Non Backwards Compatible Broadcast Services) is not backwards-compatible with EN 300 421 2. BC-BS (Backwards-Compatible Broadcast Services) is backwards-compatible to EN 300 421 2 (see annex F). In fact, with a large number
44、 of DVB-S receivers already installed, backwards compatibility may be required for a period of time, where old receivers continue to receive the same capacity as before, while the new DVB-S2 receivers could receive additional capacity broadcasts. When the complete receiver population has migrated to
45、 DVB-S2, the transmitted signal can be modified to a non-backward compatible mode, thus exploiting the full potential of DVB-S2. To facilitate the reception of DVB-S services by DVB-S2 receivers, implementation of DVB-S in DVB-S2 chips is highly recommended. Interactive Services (IS) Interactive dat
46、a services including Internet access DVB-S2 is intended to provide interactive services to consumer IRDs and to personal computers, where DVB-S2s forward path supersedes the current DVB-S standard EN 300 421 2 for interactive systems. The return path can be implemented using various DVB interactive
47、systems, such as DVB-RCS (EN 301 790 7), DVB-RCP (ETS 300 801 8), DVB-RCG (EN 301 195 9), DVB-RCC (ES 200 800 10). Data services are transported in (single or multiple) Transport Stream format according to EN 301 192 5 (e.g. using Multiprotocol Encapsulation), or in (single or multiple) generic stre
48、am format. DVB-S2 can provide Constant Coding and Modulation (CCM), or Adaptive Coding and Modulation (ACM), where each individual satellite receiving station controls the protection mode of the traffic addressed to it. Input Stream Adaptation for ACM is specified in annex D. Digital TV Contribution
49、 and Satellite News Gathering (DTVC/DSNG) Digital television contribution applications by satellite consist of point-to-point or point-to-multipoint transmissions, connecting fixed or transportable uplink and receiving stations. They are not intended for reception by the general public. According to ITU-R Recommendation SNG.770-1 11, SNG is defined as “Temporary and occasional transmission with short notice of television or sound for broadcasting purposes, using highly portable or transportable uplink earth stati
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