ETSI EN 300 473 V1.1.2 (1997-08)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digitalna videoradiodifuzija (DVB) – Distribucijski sistemi s satelitsko televizijo prek glavne antene (SMATV)Digital Video Broadcasting (DVB); Satellite Master Antenna Television (SMATV) distribution systems33.170Televizijska in radijska difuzijaTelevision and radio broadcasting33.120.40AnteneAerialsICS:Ta slovenski standard je istoveten z:EN 300 473 Version 1.1.2SIST EN 300 473 V1.1.2:2003en01-december-2003SIST EN 300 473 V1.1.2:2003SLOVENSKI
STANDARD



SIST EN 300 473 V1.1.2:2003



European Telecommunications Standards Institute EN 300 473 V1.1.2 (1997-08)European Standard (Telecommunications series)Digital Video Broadcasting (DVB);Satellite Master Antenna Television (SMATV)distribution systemsEBUUEREuropean Broadcasting UnionUnion Européenne de Radio-TélévisionSIST EN 300 473 V1.1.2:2003



EN 300 473 V1.1.2 (1997-08)2ReferenceREN/JTC-00DVB-48 (4do00idc.PDF)KeywordsDVB, digital, video, broadcasting, MPEG, TV,SMATVETSI SecretariatPostal addressF-06921 Sophia Antipolis Cedex - FRANCEOffice address650 Route des Lucioles - Sophia AntipolisValbonne - FRANCETel.: +33 4 92 94 42 00
Fax: +33 4 93 65 47 16Siret N° 348 623 562 00017 - NAF 742 CAssociation à but non lucratif enregistrée à laSous-Préfecture de Grasse (06) N° 7803/88X.400c= fr; a=atlas; p=etsi; s=secretariatInternetsecretariat@etsi.frhttp://www.etsi.frCopyright NotificationNo 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 1997.© European Broadcasting Union 1997.All rights reserved.SIST EN 300 473 V1.1.2:2003



EN 300 473 V1.1.2 (1997-08)3ContentsIntellectual Property Rights.4Foreword.41Scope.52Normative references.53Symbols and abbreviations.63.1Symbols.63.2Abbreviations.64SMATV distribution system concepts.75SMATV System A.85.1Full implementation of SMATV System A.85.2Simplified implementation of SMATV System A.86SMATV System B.106.1SMATV-IF.116.2SMATV-S.117MPEG-2 transport layer.118Framing structure.11Annex A (informative):Channel model of SMATV distribution systems.12A.1Channel model response.12A.2Definition of adaptive equalization requirements.12Annex B (informative):Examples of 64-QAM and QPSK performance with equalizers.15B.1SMATV System A - Simulation results.15B.2SMATV System B - Simulation results.16Annex C (informative):Bit rate consideration for SMATV distribution systems.20Annex D (Informative):Bibliography.22History.23SIST EN 300 473 V1.1.2:2003



EN 300 473 V1.1.2 (1997-08)4Intellectual Property RightsIPRs essential or potentially essential to the present document may have been declared to ETSI. The informationpertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be foundin ETR 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect ofETSI standards", which is available free of charge from the ETSI Secretariat. Latest updates are available on the ETSIWeb server (http://www.etsi.fr/ipr).Pursuant to the ETSI Interim 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 ETR 314 (or the updates onhttp://www.etsi.fr/ipr) which are, or may be, or may become, essential to the present document.ForewordThis 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 front page of 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 Technical Committee (JTC) of theEuropean Broadcasting Union (EBU), Comité Européen de Normalisation ELECtrotechnique (CENELEC) and theEuropean Telecommunications Standards Institute (ETSI).NOTE:The EBU/ETSI JTC was established in 1990 to co-ordinate the drafting of standards in the specific fieldof broadcasting and related fields. Since 1995 the JTC became a tripartite body by including in theMemorandum of Understanding also CENELEC, which is responsible for the standardization of radio andtelevision receivers. The EBU is a professional association of broadcasting organizations whose workincludes the co-ordination of its members' activities in the technical, legal, programme-making andprogramme-exchange domains. The EBU has active members in about 60 countries in the Europeanbroadcasting area; its headquarters is in Geneva *.*European Broadcasting UnionCase Postale 67CH-1218 GRAND SACONNEX (Geneva)SwitzerlandTel:+41 22 717 21 11Fax:+41 22 717 24 81Digital Video Broadcasting (DVB) ProjectFounded in September 1993, the DVB Project is a market-led consortium of public and private sector organizations inthe television industry. Its aim is to establish the framework for the introduction of MPEG-2 based digital televisionservices. 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 broadcastindustry.Proposed national transposition datesDate of adoption of ETS 300 473:26 December 1994Date of latest announcement of ETS 300 473 (doa):31 August 1995Date of latest publication of new National Standardor endorsement of ETS 300 473 (dop/e):29 February 1996Date of withdrawal of any conflicting National Standard (dow):29 February 1996SIST EN 300 473 V1.1.2:2003



EN 300 473 V1.1.2 (1997-08)51ScopeThe present document describes the transmission system proposal for digital multi-programme television suitable fordistribution in Satellite Master Antenna Television (SMATV) systems.The present document is complementary to the EN 300 429 [1] and it is aligned with EN 300 421 [2].The System described in the present document is compatible with the modulation and channel coding systems used fordigital multi-programme television by cable and satellite transmissions (see EN 300 429 [1] and EN 300 421 [2],respectively).The System described in the present document is based on the MPEG-2 System Layer, see ISO/IEC DIS 13818-1 [3],with the addition of appropriate Forward Error Correction (FEC) technique.The System described in the present document allows for further evolution as technology advances as described indocument EN 300 429 [1] and is capable of starting a reliable service as of now (see also annex D, bibliography).2Normative referencesReferences may be made to:a)specific versions of publications (identified by date of publication, edition number, version number, etc.), inwhich case, subsequent revisions to the referenced document do not apply; orb)all versions up to and including the identified version (identified by "up to and including" before the versionidentity); orc)all versions subsequent to and including the identified version (identified by "onwards" following the versionidentity); ord)publications 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 samenumber.[1]EN 300 429: "Digital Video Broadcasting (DVB); Framing structure, channel coding andmodulation for cable systems".[2]EN 300 421: "Digital Video Broadcasting (DVB); Framing structure, channel coding andmodulation for 11/12 GHz satellite services".[3]ISO/IEC DIS 13818-1 (1994): "Coding of moving pictures and associated audio".[4]Forney, G.D. IEEE Trans. Comm. Tech., COM-19, pp. 772-781, (October 1971):"Burst-correcting codes for the classic bursty channel".SIST EN 300 473 V1.1.2:2003



EN 300 473 V1.1.2 (1997-08)63Symbols and abbreviations3.1SymbolsFor the purposes of the present document, the following symbols apply:µroll-off factorf0channel centre frequencyRssymbol Rate corresponding to the bilateral Nyquist bandwidth of the modulated signalRuuseful bit Rate after MPEG-2 transport multiplexerRu'bit Rate after RS outer coderTnumber of bytes which can be corrected in RS error protected packetTssymbol period3.2AbbreviationsFor the purposes of the present document, the following abbreviations apply:BBBaseBandBERBit Error RatioBWBandWidthC/NSignal-to-Noise ratioDTVCDigital TeleVision by CableDVBDigital Video BroadcastingETSEuropean Telecommunication StandardFECForward Error CorrectionFIRFinite Impulse ResponseIFIntermediate FrequencyIRDIntegrated Receiver DecoderLNBLow Noise BlockLSBLeast Significant BitMPEGMoving Pictures Experts GroupMSBMost Significant BitMUXMultiplexPDHPlesiochronous Digital HierarchyPRBSPseudo Random Binary SequenceQAMQuadrature Amplitude ModulationQEFQuasi Error FreeQPSKQuaternary Phase Shift KeyingRFRadio FrequencyRSReed-SolomonSMATVSatellite Master Antenna TeleVision (as defined in clause 4)SMATV-DTMSMATV system based on Digital TransModulationSMATV-IFSMATV system based on distribution at IFSMATV-SSMATV system based on distribution at extended Super bandTDLTapped Delay LineTDMTime Division MultiplexTDTTransparent Digital TransmodulationTVTelevisionUHFUltra High FrequencyVHFVery High FrequencySIST EN 300 473 V1.1.2:2003



EN 300 473 V1.1.2 (1997-08)74SMATV distribution system conceptsA Satellite Master Antenna Television (SMATV) system is defined as a system which is intended for the distribution oftelevision and sound signals to households located in one or more adjacent buildings.These signals are received by a satellite receiving antenna and may be combined with terrestrial TV signals. SMATVdistribution systems are also known as community antenna installations or domestic TV cable networks.A SMATV system represents a means for sharing the same resources among several users for satellite and terrestrialreception.The SMATV System is designed to perform the adaptation of the satellite TV signals to the SMATV channelcharacteristics.The primary consideration of the SMATV System is the transparency of the SMATV head-end to the digital TVmultiplex from a satellite reception without baseband interfacing, delivering that signal to the user home IntegratedReceiver Decoder (IRD); thus permitting simple and cost effective head-end as required for the consumer profile ofSMATV equipment.The present document considers two main SMATV System approaches for distribution of digital TV signals in SMATVinstallations, as follows:SMATV System AThe System A approach consists of the transmodulation from satellite Quaternary Phase Shift Keying (QPSK)signals as defined in EN 300 421 [2] to a Quadrature Amplitude Modulation (QAM) scheme (16-QAM, 32-QAMor 64-QAM) using either:a.1)a full implementation of the System described in EN 300 429 [1] (see subclause 5.1), ora.2)a simplified transmodulation process as described in subclause 5.2 of the present document.This process of transmodulation without baseband interfacing is also known as "Transparent Transmodulation".SMATV System BThe System B approach consists of direct distribution of QPSK satellite signals as defined in EN 300 421 [2]using frequency conversion of the received satellite signal to a frequency band appropriate to the characteristicsof the distribution network.The use of one of the System A or System B approaches depends on the technical performance and cost trade-offs ineach particular situation.NOTE:Digital terrestrial specification is not the subject of the present document.SIST EN 300 473 V1.1.2:2003



EN 300 473 V1.1.2 (1997-08)85SMATV System ASMATV System A is based on the use of the transmodulation from satellite QPSK signals to a QAM modulation scheme(see figure 1). This system is also known as SMATV-DTM.The System comprises the following elements:-Head-end transmodulation unit: this performs the required decoding and adapts the signal modulation codingto the cable distribution network. This unit is also known as the Transparent Digital Transmodulator (TDT).-SMATV UHF distribution network: this is a physical cable structure for distribution of the signal to severalusers. The reference channel response of SMATV distribution network is given in annex A.-User IRD: this unit performs the required equalization to compensate the channel distortion as well asdemodulating and decoding the QAM signal.5.1Full implementation of SMATV System AA full implementation of the QAM System shall be performed according to EN 300 429 [1] and EN 300 421 [2] with atransparent interface between them.To this end, the full implementation of SMATV System A shall make use of the MPEG-2 transport layer, the framingstructure, the channel coding, the byte-to-symbol mapping and modulation consistent with EN 300 429 [1] andEN 300 421 [2].The channel coding shall include the randomization for spectrum shaping, the Reed-Solomon (RS) coding and theconvolutional interleaving according to Forney [4]. This configuration is shown in figure 2.5.2Simplified implementation of SMATV System AIn the complete implementation architecture of SMATV System A, outer error protection (i.e. RS and convolutionalinterleaving) is performed twice, i.e. independently for the satellite link and the cable link. Therefore, the cable link isfed by a Quasi Error Free (QEF) bit stream.In cases when an adequate satellite link margin is achieved, one RS decoder-encoder and deinterleaving-interleavingprocess could be eliminated from the System. In such cases, a single RS decoder at the user IRD is capable of correctingerrors generated in the cable link added to the remaining burstly errors after Viterbi decoding.This configuration is shown in figure 2 when removing the dashed line blocks.NOTE:This simplified configuration may imply a non-negligible saving in terms of the number of gates and thusin the total equipment cost.Due to consumer type character of SMATV head-ends, this saving is important when an economy of scaleis achieved.Consequently, manufacturers could decide whether to adopt the simplified SMATV System Aarchitecture.SIST EN 300 473 V1.1.2:2003



EN 300 473 V1.1.2 (1997-08)9Figure 1: SMATV System A configurationFigure 2: Functional diagram of a SMATV System ASIST EN 300 473 V1.1.2:2003



EN 300 473 V1.1.2 (1997-08)106SMATV System BSMATV System B is based on the use of QPSK modulation (see figure 3).The SMATV System B concept allows a direct reception of digital satellite signals by the user IRD connected to aSMATV distribution network. The functional elements of this system are given in the baseline satellite specificationEN 300 421 [2].Two configurations of SMATV System B are c
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