1、STD.ETS1 EN 300 421-ENGL 1997 3400855 U237444 89L m EN 300 421 1.1.2 (1997-081 I European Standard (Telecommunications series) Digital Video Broadcasting (DVB); Framing structure, channel coding and modulation for 1 1/12 GHz satellite services COPYRIGHT European Telecommunications Standards Institut
2、eLicensed by Information Handling Services2 EN 300 421 V1.1.2 (1997-08) Reference RENIJTC-00DVB-41 (3wcOOidc.PDF) Keywords DVB, digital, video, broadcasting, satellite, MPEG, TV ETSI Secretariat Postai address F-O6921 Sophia Antipolis Cedex - FRANCE Office address 650 Route des Lucioles - Sophia Ant
3、ipolis Valbonne - FRANCE Siret No 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-prfecture de Grasse (06) No 7803/88 Tel. : +33 4 92 94 42 O0 Fax: +33 4 93 65 47 16 X.400 c= fr; a=atlas; p=etsi; s=secretariat internet secretariata etsi.fr http:/www.etsi.fr Copyright No
4、tification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. O European Telecommunications Standards Institute 1997. O European Broadcasting Union 1997. Aii rights reserved. COPYRIGHT European Teleco
5、mmunications Standards InstituteLicensed by Information Handling ServicesSTD-ETSI EN 300 421-ENGL 1777 3400855 02L744b bb4 H 3 EN 300 421 V1.1.2 (1997-08) Contents Intellectual Property Rights 4 Foreword 5 1 2 3 3.1 3.2 4 4.1 4.2 4.3 4.4 4.4.1 4.4.2 4.4.3 4.5 5 Scope 6 Symbols and abbreviations 7 Tr
6、ansmission system 8 interfacing 9 Channel coding . 9 Normative references . 6 Symbols . Abbreviations . 7 System definition . 8 Adaptation to satellite transponder characteristics . 9 Transport multiplex adaptation and randomization for energy dispersal 9 Outer coding (RS). interleaving and framing
7、. 10 Inner coding (convolutional) 12 . 13 Error performance requirements 14 Baseband shaping and modulation . Annex A (normative): Annex B (informative): Conceptual System description 17 Annex C (informative): Examples of bit rates versus transponder bandwidth . 19 Annex D (informative): Examples of
8、 possible use of the System . 22 Annex E (informative): Bibliography . 23 History 24 Signal spectrum at the modulator output . 15 COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling Services STD-ETSI EN 300 421-ENGL 1777 300855 0237447 5T0 M 4 EN 300 421 V1.1.2
9、(1997-08) 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 ETR 314: “Intellectual Prope
10、rty Rights (1PRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ESI standards“, which is available free of charge from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/www.etsi.fi-/ipr). Pursuant to the ETSI Interim IPR Policy, no investiga
11、tion, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETR 314 (or the updates on http:/www.etsi.fr/ipr) which are, or may be, or may become, essential to the present document. COPYRIGHT European Telecommunications St
12、andards InstituteLicensed by Information Handling ServicesSTD-ETSI EN 300 421-ENGL 1997 3400855 0237448 437 5 EN 300 421 V1.1.2 (1997-08) Foreword This second edition, previously as an ETS now an EN, contains changes of an entirely editorial nature as follows: 1) add the DVB logo to the kont page of
13、 the deliverable; 2) change the title from: “Digital broadcasting systems for television, sound and data services; etc.“ to “Digital Video Broadcast (DVB); etc.“; 3) add in the foreword the DVB acknowledgement. This European Standard (Telecommunications series) has been produced by the Joint Technic
14、al Committee (JTC) of the European Broadcasting Union (EBU), Comit Europen de Normalisation ELECtrotechnique (CENELEC) and the European Telecommunications Standards institute (ETSI). NOTE: The EBUETSI JTC was established in 1990 to Co-ordinate the drafting of standards in the specific field of broad
15、casting and related fields. Since 1995 the JTC 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 include
16、s 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 Case Postale 67 CH-1218 GRAND SAC
17、ONNEX (Geneva) Switzerland Tel: +41 22717 21 11 Fax: +4122 717 24 81 Digital Video Broadcasting (DVB) Project Founded in September 1993, the DVB Project is a market-led consortium of public and private sector organizations in the television industry. Its aim is to establish the framework for the int
18、roduction 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 consumer electronics and the broadcast industry. Proposed national
19、transposition dates Date of adoption: Date of latest announcement of this EN (doa): 15 August 1994 30 November 1997 Date of latest publication of new National Standard or endorsement of this EN (dople): 31 May 1998 I Date of withdrawal of any conflicting National Standard (dow): 31 May 1998 COPYRIGH
20、T European Telecommunications Standards InstituteLicensed by Information Handling Services STD-ETSI EN 300 421-ENGL 1997 W 3400855 0237449 373 W 6 EN 300 421 V1 .i .2 (1997-08) 1 Scope The present document describes the modulation and channel coding system (denoted the “System“ for the purposes of t
21、he present document) for satellite digital multi-programme Television (TV)/High Definition Television (HDTV) services to be used for primary and secondary distribution in Fixed Satellite Service (FSS) and Broadcast Satellite Service (BSS) bands. The System is intended to provide Direct-To-Home (DTH)
22、 services for consumer Integrated Receiver Decoder (IRD), as well as collective antenna systems (Satellite Master Antenna Television (SMATV) and cable television head-end stations, with a likelihood of remodulation, see EN 300 429 (bibliography). The System uses Quaternary Phase Shift Keying (QPSK)
23、modulation and concatenated error protection strategy based on a convolutional code and a shortened Reed-Solomon (RS) code. The System is suitable for use on different satellite transponder bandwidths. Compatibility with Moving Pictures Experts Group-2 (MPEG-2) coded TV services (see ISO/IEC DIS 138
24、18-1 i), with a transmission structure synchronous with the packet multiplex, is provided. Exploitation of the multiplex flexibility allows the use of the transmission capacity for a variety of TV service configurations, including sound and data services. All service components are Time Division Mul
25、tiplexed (TDM) on a single digital carrier. The present document: - gives a general description of the System for satellite digital TV transmission; specifies the digitally modulated signal in order to allow compatibility between pieces of equipment developed by different manufacturers. This is achi
26、eved by describing in detail the signal processing principles at the modulator side, while the processing at the receive side is left open to different implementation solutions. However, it is necessary in the present document to refer to certain aspects of reception; identifies the global performan
27、ce requirements and features of the System, in order to meet the service quality targets. - - 2 Normative references References may be made to: a) specific versions of publications (identified by date of publication, edition number, version number, etc.), in which case, subsequent revisions to the r
28、eferenced document do not apply; or b) all versions up to and including the identified version (identified by “up to and including“ before the version identity); or c) all versions subsequent to and including the identified version (identified by “onwards“ following the version identity); or d) publ
29、ications without mention of a specific version, in which case the latest version applies. A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the same number. il Pl ISO/IEC DIS 13818-1 (June 1994): “Coding of moving pictures and associated audio“
30、. Forney, G.D. IEEE Trans. Comm. Tech., COM-19, pp. 772-781, (October 1971): “Burst- correcting codes for the classic bursty channel“. Intelsat Earth Station Standards (IESS) No. 308, revision 6 (26 October 1990): “Performance characteristics for Immediate Data Rate (IDR) digital carriers“. 31 COPYR
31、IGHT European Telecommunications Standards InstituteLicensed by Information Handling ServicesSTD-ETSI EN 300 421-ENGL L997 W 3400855 0237450 095 7 EN 300 421 Vi .1.2 (1997-08) 3 Symbols and abbreviations 3.1 Symbols For the purposes of the present document, the following symbols apply: Roll-off fact
32、or Signal-to-noise ratio Convolutional code free distance Ratio between the energy per useful bit and twice the noise power spectral density Nyquist frequency Convolutional code generators RS code generator polynomial Interleaving depth bytes In-phase, Quadrature phase components of the modulated si
33、gnal Branch index of the interleaver Convolutional code constraint length Convolutional interleaver branch depth for j = 1, M = N/I Error protected frame length (bytes) RS field generator polynomial In-band ripple (dB) Symbol rate corresponding to the bilateral Nyquist bandwidth of the modulated sig
34、nal Useful bit rate after MPEG-2 i transport multiplexer Bit rate after RS outer coder Number of bytes which can be corrected in RS error protected packet Symbol period Di-bit stream after rate 112 convolutional coding 3.2 Abbreviations For the purposes of the present document, the following abbrevi
35、ations apply: AWGN BB BER BSS BW DTH FDM FEC FIFO FIR FS S HEX HDTV IF IMUX IRD MPEG MSB MUX OB0 OCT OMUX PDH PS K PRBS e Additive White Gaussian Noise B aseB and Bit Error Ratio Broadcast Satellite Service Bandwidth Direct To Home Frequency Division Multiplex Forward Error Correction First-In, Firs
36、t-Out shift register Finite Impulse Response Fixed Satellite Service Hexadecimal notation High Definition Television Intermediate Frequency Input Multiplexer - Filter Integrated Receiver Decoder Moving Pictures Experts Group Most Significant Bit Multiplex Output Back Off Octal notation Output Multip
37、lexer - Filter Puncturing Plesiochronous Digital Hierarchy Phase Shift Keying Pseudo Random Binary Sequence COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling ServicesQEF QPSK R RF RS SMATV TBD TDM TV TWTA 8 EN 300 421 V1.1.2 (1997-08) Quasi-Error-Free Quaterna
38、ry PSK Randomized sequence Radio Frequency Reed-S olomon Satellite Master Antenna Television To Be Defined Time Division Multiplex Television Travelling Wave Tube Amplifier 4 Transmission system 4.1 System definition The System is defined as the functional block of equipment performing the adaptatio
39、n of the baseband TV signals, from the output of the MPEG-2 transport multiplexer (see ISO/IEC DIS 13818-1 l), to the satellite channel characteristics. The following processes shall be applied to the data stream (see figure 1): - - outer coding (Le. Reed-Solomon); - convolutional interleaving; - -
40、baseband shaping for modulation; - modulation. transport multiplex adaptation and randomization for energy dispersal; inner coding (i.e. punctured convolutional code); The System functional description is given in annex B. DTH services via satellite are particularly affected by power limitations, th
41、erefore, ruggedness against noise and interference, shall be the main design objective, rather than spectrum efficiency. To achieve a very high power efficiency without excessively penalizing the spectrum efficiency, the System shall use QPSK modulation and the concatenation of convolutional and RS
42、codes. The convolutional code is able to be configured flexibly, allowing the optimization of the system performance for a given satellite transponder bandwidth (see annex C). Although the System is optimized for single carrier per transponder Time Division Multiplex (TDM), it is able to be used for
43、 multi-carrier Frequency Division Multiplex (FDM) type applications. 0 Video coder 0 Audio coder 0 Data coder I/ Service components M. EBU Review - Technical, Summer 93, (EBU V4MOD 235 rev.): “Satellite digital multi-programme TV/HDTV“. DTVB 11 10/GT V4/MOD 252/ DTVC 18,7th revised version, January
44、1994: “Baseline modulatiodchannel coding system for digital multi-programme television by satellite“ (Contribution from V4/MOD-B). EN 300 429: “Digital Video Broadcasting (DVB); Framing structure, channel coding and modulation for cable systems“. - - COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling Services24 EN 300 421 V1.1.2 (1997-08) History ISBN 2-7437-1 649-5 Dpt lgal : AoGt 1997 COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling Services
