SIST ETS 300 799:1999

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digitalna zvokovna radiodifuzija (DAB) - Vmesniki za razpošiljanje - Vmesnik za razpošiljanje oddajanega signala (ETI))Digital Audio Broadcasting (DAB); Distribution interfaces; Ensemble Transport Interface (ETI)33.170Televizijska in radijska difuzijaTelevision and radio broadcastingICS:Ta slovenski standard je istoveten z:ETS 300 799 E13SIST ETS 300 799:1999en01-MXQLM19993SIST ETS 300 799:1999SLOVENSKI
STANDARD



SIST ETS 300 799:1999



EUROPEANETS 300 799TELECOMMUNICATIONSeptember 1997STANDARDSource: EBU/CENELEC/ETSI JTCReference: DE/JTC-00DAB-7ICS:33.020Key words:DAB, digital, audio, broadcasting, transport, interfaceEBUUEREuropean Broadcasting UnionUnion Européenne de Radio-TélévisionDigital Audio Broadcasting (DAB);Distribution interfaces;Ensemble Transport Interface (ETI)ETSIEuropean Telecommunications Standards InstituteETSI SecretariatPostal address: F-06921 Sophia Antipolis CEDEX - FRANCEOffice address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCEX.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.frTel.: +33 4 92 94 42 00 - Fax: +33 4 93 65 47 16Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and theforegoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1997.© European Broadcasting Union 1997.All rights reserved.SIST ETS 300 799:1999



Page 2ETS 300 799: September 1997Whilst every care has been taken in the preparation and publication of this document, errors in content,typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to"ETSI Editing and Committee Support Dept." at the address shown on the title page.SIST ETS 300 799:1999



Page 3ETS 300 799: September 1997ContentsForeword.7Introduction.81Scope.112Normative references.113Definitions, abbreviations and symbols.123.1Definitions.123.2Abbreviations.143.3Symbols.153.3.1Numerical ranges.153.3.2Bit and byte numbering.153.3.3Arithmetic operators.153.3.4Logical operators.153.4Ordering of bytes and bits for transmission.163.5Reserved bits.164Overview of the Ensemble Transport Interface (ETI) definition.174.1The Layered approach to the ETI.174.2ETI data capacity.194.3Minimum requirement for ETI equipment.195Logical definition of ETI(LI).195.1General structure.205.2Error field (ERR).205.3Frame Characterization field (FC).225.3.1Frame Count (FCT).225.3.2Fast Information Channel Flag (FICF).225.3.3Number of Streams (NST).225.3.4Frame Phase (FP).235.3.5Mode Identity (MID).235.3.6Frame Length (FL).235.4Stream Characterization (STC).245.4.1Sub-channel Stream Characterization (SSTCn).245.4.1.1Sub-Channel Identifier (SCID).245.4.1.2Sub-channel Start Address (SAD).245.4.1.3Sub-channel Type and Protection Level (TPL).255.4.1.4Sub-channel Stream Length (STL).255.5End-Of-Header data (EOH).255.5.1Multiplex Network Signalling Channel (MNSC).255.5.2Header Cyclic Redundancy Checksum (CRCh).265.6Main Stream data (MST).265.7End Of Frame (EOF).275.7.1Cyclic Redundancy Checksum (CRC).275.7.2Reserved bytes.275.8ETI(LI) Time Stamp (TIST).275.9Null transmissions.275.10Total number of bytes carrying information.275.11Maximum size of ETI(LI).276Network Independent layer for G.703 interfaces, ETI(NI) or ETI(NI, G.703).286.1General.286.2Adaptation of the logical layer.296.2.1Synchronization Field (SYNC).296.2.1.1Error Status (ERR).29SIST ETS 300 799:1999



Page 4ETS 300 799: September 19976.2.1.2Frame Synchronization Field (FSYNC).296.2.2ETI(LI) Data Field (LIDATA).306.2.3Frame Padding Field (FRPD).306.3Physical interface.307Network Independent Layer for V.11 interfaces, ETI(NI, V11).317.1General.317.2Adaptation of the logical layer.327.2.1Synchronization Field (SYNC).327.2.1.1Error Status (ERR).327.2.1.2Frame Synchronization Field (FSYNC).327.2.2ETI(LI) Data Field (LIDATA).337.2.3Frame Padding Field (FRPD).337.3Physical interface.338Network Adaptation for G.704 networks, ETI(NA, G.704).348.1General.348.2Transparency of ETI(NA, G.704) layer to ETI(LI).358.2.1Transparency of ETI(NA, G.704)5592 layer to ETI(LI).358.2.2Transparency of ETI(NA, G.704)5376 layer to ETI(LI).358.3ETI(NA, G.704) structure.358.3.1G.704 reserved bytes.368.3.2ETI(NA, G.704) reserved bytes.368.3.2.1Multiframe management byte, Mbl,s.368.3.2.2Multiframe supervision byte, Sbl,s.388.4ETI(NA, G.704) multiframe generation.388.4.1General description.388.4.2Error coding and interleaving for ETI(NA, G.704)5592.398.4.2.1Coding array formation.398.4.2.2Interleaving.408.4.2.3Output array formation.408.4.3Error coding and interleaving for ETI(NA, G.704)5376.408.4.3.1Coding array formation.408.4.3.2Interleaving.418.4.3.3Output array formation.418.5Order of data transmission.418.6Error protection code.418.7Synchronization.418.7.1Synchronization of G.704 frames.418.7.2Synchronization of ETI(NA, G.704) multiframes.428.8Physical interface.428.9Modifying the ETI(LI) STAT field.428.10Illustration of the capacity of ETI(NA, G.704).45Annex A (normative):Coding of MNSC Data.46A.1Introduction.46A.2Frame Synchronous Signalling (FSS).46A.2.1FSS messages structure.46A.2.2Pre-assigned FSS message types.46A.3Frame Asynchronous Signalling (ASS).47A.3.1ASS messages structure.47A.3.2Pre-assigned ASS message types.47A.3.2.1ASS message type 0: Transmitter Set-up and Control Information (TSC).47Annex B (normative):Coding of NASC Data.49B.1General.49B.2Frame Synchronous Signalling (FSS).49SIST ETS 300 799:1999



Page 5ETS 300 799: September 1997B.3Asynchronous Signalling (ASS).49Annex C (normative):Coding of timestamps.50C.1General.50C.2Timestamp coding.50C.2.1Expected range of timestamp values.50C.2.2Null timestamp.50C.2.3Reserved timestamp values.50C.2.4Timestamp levels.50C.3Mapping to ETI(LI) timestamp bits.50C.4Mapping to ETI (NA, G.704) timestamp bits.51C.5Interpretation of timestamp value.51C.6Use of timestamps in LI and NA layers.51Annex D (normative):Calculation of CRC words in the ETI.52Annex E (normative):Behaviour of the ETI during re-configuration.53E.1Background.53E.2Multiplex reconfiguration.53Annex F (informative):Managing delay in the Ensemble Transport network.55F.1General.55F.2Dynamic delay compensation.56Annex G (informative):Network testing and monitoring.58G.1General.58G.2Pseudo Random Binary Sequence (PRBS).58G.2.1PRBS generator.58G.2.2PRBS extractor.59G.3PRBS containers.59G.3.1Full DAB channel.59G.3.2Single DAB sub-channel.59G.3.3G.704 ts16 measurement.60Annex H (informative):Cascading in the Ensemble Transport network.61H.1General.61H.2Management of the overall delay to allow SFN operation.61H.3Testing and monitoring in a cascaded network.61Annex J (informative):Carrying ETI on 1 544 kbit/s links.63J.1Introduction.63J.2General outline of ETI(NA, G.704-T1).63J.3Transparency of ETI(NA, G.704-T1) layer to ETI(LI).63SIST ETS 300 799:1999



Page 6ETS 300 799: September 1997J.3.1Transparency of ETI(NA, G.704-T1)4464 layer to ETI(LI).63J.3.2Transparency of ETI(NA, G.704-T1)4320 layer to ETI(LI).63J.4ETI(NA, G.704-T1) structure.64J.5Error protection for ETI(NA, G.704-T1).64J.6Illustration of the capacity of ETI(NA, G.704-T1).65Annex K (informative):Bibliography.69History.70SIST ETS 300 799:1999



Page 7ETS 300 799: September 1997ForewordThis European Telecommunication Standard (ETS) has been produced by the Joint Technical Committee(JTC) of the European Broadcasting Union (EBU), Comité Européen de Normalisation ELECtrotechnique(CENELEC) and the European Telecommunications Standards Institute (ETSI).NOTE:The EBU/ETSI JTC was established in 1990 to co-ordinate the drafting of ETSs in thespecific field of broadcasting and related fields. Since 1995 the JTC became a tripartitebody by including in the Memorandum of Understanding also CENELEC, which isresponsible for the standardization of radio and television receivers. The EBU is aprofessional association of broadcasting organizations whose work includes theco-ordination of its Members' activities in the technical, legal, programme-making andprogramme-exchange domains. The EBU has Active Members in about 60 countriesin the European Broadcasting 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 81EUREKA Project 147 (DAB**)EUREKA Project 147 was established in 1987, with funding from the EC, to develop a system for thebroadcasting of audio and data to fixed, portable or mobile receivers. Their work resulted in the publicationof a European Standard, ETS 300 401 [1], for DAB which now has world-wide acceptance. The membersof the Eureka 147 Project are drawn from broadcasting organizations and telecommunication providerstogether with companies from the professional and consumer electronics industry.**DAB is a registered trademark owned by one of the EUREKA 147 partners.ETSI Project Team PT 84VAn ETSI Project Team was formed to produce this ETS describing the Digital Audio Broadcasting (DAB)Ensemble Transport Interface (ETI). The work of the Project Team was based on studies carried out by aEUREKA 147 Task Force on the definition of the ETI. The Project Team consisted of members ofEuropean broadcasting organizations and the consumer and professional electronics industry who hadalso been involved in the work of the EUREKA Task Force.Transposition datesDate of adoption:22 August 1997Date of latest announcement of this ETS (doa):31 December 1997Date of latest publication of new National Standardor endorsement of this ETS (dop/e):30 June 1998Date of withdrawal of any conflicting National Standard (dow):30 June 1998SIST ETS 300 799:1999



Page 8ETS 300 799: September 1997IntroductionThis ETS is one of a set associated with ETS 300 401 [1] describes the transmitted signal, the interfacebetween the broadcaster's transmitters and the listener's receiver. The associated ETSs describeadditional interfaces which can be used by broadcasters or network providers to build DAB networks.Figure 1 shows a DAB network in outline. For convenience, the Network is split into a number of differentparts, each managed by a different entity. The different entities are: the Programme/Data provider, theService Component provider, the Ensemble provider and the Transmission Network provider.NOTE:A Service Component provider may be generating a full DAB service or a componentof a DAB service. For the purposes of this ETS, the terms Service provider andService Component provider are interchangeable.Programme/Data providerThe Programme/Data provider is the originator of the audio programme or the data being carried withinthe DAB Service Component. The format for the output of the Programme/Data provider may take manydifferent forms and should be agreed between the Programme/Data provider and the Service Componentprovider.Service Component providerThe Service Component provider is producing one or more complete Service Components which can formthe complete DAB Service, but may not. The data from the Service Component provider will be of threedifferent types:-Service Component data which is to be inserted into the DAB Main Service Channel (MSC);-Service Information related to the Service Component data which is to be inserted into theFast Information Channel (FIC);-Other data, not intended for transmission, including status monitoring or control.The interface between the Service Component provider and the Ensemble provider is known as theService Transport Interface (STI) and is defined in EN 300 797 [2].Ensemble providerThe Ensemble provider receives a set of service components from one or more Service Componentproviders. He then formats the FIC, and generates an unambiguous description of the full DAB Ensemble.The ensemble description is passed to the Transmission Network provider via an interface called the ETIwhich is the subject of this ETS.Transmission Network providerThe Transmission Network provider generates the DAB Ensemble and transmits it to the receiver. Theoutput of the Transmission provider is defined by ETS 300 401 [1].In some cases, as an intermediate step, the Transmission provider may find it convenient to generate abase-band representation of the signal to be transmitted. The base-band representation, known as theDigital baseband I/Q Interface, is a set of digital samples defining the In-phase (I) and Quadrature (Q)components of the final carrier. This interface is defined in EN 300 798 [3] and provides a convenientinterface between digital processing equipment and radio-frequency modulating equipment.SIST ETS 300 799:1999



Page 9ETS 300 799: September 1997Programmeor Dataprovider N
ATransmission Network providerSTISTISTISTIETIProgrammeor Dataprovider 1
ZFrom other ServiceComponent providersSTI - Service Transport InterfaceETI - Ensemble Transport InterfaceDIQ - Digital Baseband I/Q InterfaceTransmitter 1Transmitter METIETIDIQDIQServiceComponentproviderServiceComponentproviderEnsembleproviderBasebandprocessingRFmodulationBasebandprocessingRFmodulationDAB Ensemble toETS 300 401 [1]DAB Ensemble toETS 300 401 [1]Programmeor Dataprovider 1
AProgrammeor Dataprovider N
ZService Component provider ZService Component provider AFigure 1: DAB network outlineSIST ETS 300 799:1999



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Page 11ETS 300 799: September 19971ScopeThis European Telecommunication Standard (ETS) establishes a standard method for the distribution ofDAB signals between DAB multiplexing equipment, which may be located at the broadcaster's studiocentres, and DAB modulation equipment located at transmission sites.ETS 300 401 [1] established a broadcasting standard for a DAB system. Broadcasters who implementDAB networks require methods for transporting DAB signals, or the component parts of a DAB signal,between studio centres, where the programme or data service originates, and the transmitter sites fromwhich the signal will be radiated. The network of circuits connecting the studio centre to the transmitters isgenerally known as the Distribution Network.This ETS is applicable to Distribution Networks used in a DAB System. It describes the characteristics of asignal suitable for transporting a full DAB Ensemble, comprising a number of sub-channels and aformatted Fast Information Channel (FIC), between the DAB Ensemble provider and the Transmissionnetwork provider. The interface is suitable for use on a number of different physical media includingstandard 2 Mbit/s switched telecommunication networks. Provision is made for the inclusion of appropriateerror detection and correction and for the management of network transit delay. Limited capacity is alsomade available for signalling from the studio centre to other equipment in the distribution network.This ETS is not applicable to the distribution of DAB signals where the Service Information is available inany form other than as a complete, correctly formatted, FIC. The interface described is intended for useon unidirectional networks and this ETS does not cover the provision of status nor control information inthe reverse direction (i.e. from transmitters back to the Ensemble provider or any other central monitoringpoint).2Normative referencesThis ETS incorporates, by dated and undated references, provisions from other publications. Thesenormative references are cited at appropriate places in the text and the publications are listed hereafter.For dated references, subsequent amendments to or revisions to any of these publications apply to thisETS only when incorporated in it by amendment or revision. For undated references, the latest edition ofthe publication referred to applies.[1]ETS 300 401 (1996): "Radio broadcasting systems; Digital Audio Broadcasting(DAB) to mobile, portable and fixed receivers".[2]prEN 300 797: "Digital Audio Broadcasting (DAB); Distribution interfaces;Service Transport Interface (STI)".[3]prEN 300 798: "Digital Audio Broadcasting (DAB); Distribution interfaces; Digitalbaseband I/Q interface (DIQ)".[4]ITU-T Recommendation G.703 (1972): "Physical/Electrical characteristics ofhierarchical digital interfaces: Section 6. Interface at 2 048 kbit/s".[5]ITU-T Recommendation X.24 (1988): "List of definitions for interchange circuitsbetween data terminal equipment (DTE) and data circuit-terminating equipment(DCE) on public data networks".[6]ITU-T Recommendation V.11 (1988): "Electrical characteristics for balanceddouble-current interchange circuits for general use with integrated circuitequipment in the field of data communications".[7]ITU-T Recommendation G.704 (1988): "Synchronous frame structures used atprimary and secondary hierarchical levels: Section 2.3 Basic frame structure at2 048 kbit/s".[8]ITU-T Recommendation G.706 (1988): "Frame alignment and cyclic redundancycheck (CRC) procedures relating to basic frame structures definedin Recommendation G.704".SIST ETS 300 799:1999



Page 12ETS 300 799: September 19973Definitions, abbreviations and symbols3.1DefinitionsFor the purposes of this ETS, the definitions of ETS 300 401 [1] and the following definitions apply:block: A component part of an ETI(NA, G.704) multiframe consisting of 8 G.704 frames. Each blockcomprises 256 bytes.CIFcount: The common interleaved Frame (CIF) counter as defined in ETS 300 401 [1].codeword: A Reed-Solomon codeword, as used by ETI(NA, G.704), comprises 240 bytes. Some of thesebytes are data bytes, others are check bytes.cod
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