IEC6095842003

INTERNATIONALSTANDARDIEC60958-4Secondedition2003-05Digitalaudiointerface–Part4:Professionalapplications(TA4)Interfaceaudionumérique–Partie4:Applicationsprofessionnelles(TA4)IEC2003Copyright-allrightsreservedNopartofthispublicationmaybereproducedorutilizedinanyformorbyanymeans,electronicormechanical,includingphotocopyingandmicrofilm,withoutpermissioninwritingfromthepublisher.InternationalElectrotechnicalCommission,3,ruedeVarembé,POBox131,CH-1211Geneva20,SwitzerlandTelephone:[phone]Telefax:[phone]E-mail:[e-mail]:МеждународнаяЭлектротехническаяКомиссия–1–INTERNATIONALELECTROTECHNICALCOMMISSION____________DIGITALAUDIOINTERFACE–Part4:ProfessionalapplicationsFOREWORD1)TheIEC(InternationalElectrotechnicalCommission)isaworldwideorganizationforstandardizationcomprisingallnationalelectrotechnicalcommittees(IECNationalCommittees).TheobjectoftheIECistopromoteinternationalco-operationonallquestionsconcerningstandardizationintheelectricalandelectronicfields.Tothisendandinadditiontootheractivities,theIECpublishesInternationalStandards.Theirpreparationisentrustedtotechnicalcommittees;anyIECNationalCommitteeinterestedinthesubjectdealtwithmayparticipateinthispreparatorywork.International,governmentalandnon-governmentalorganizationsliaisingwiththeIECalsoparticipateinthispreparation.TheIECcollaboratescloselywiththeInternationalOrganizationforStandardization(ISO)inaccordancewithconditionsdeterminedbyagreementbetweenthetwoorganizations.2)TheformaldecisionsoragreementsoftheIEContechnicalmattersexpress,asnearlyaspossible,aninternationalconsensusofopinionontherelevantsubjectssinceeachtechnicalcommitteehasrepresentationfromallinterestedNationalCommittees.3)Thedocumentsproducedhavetheformofrecommendationsforinternationaluseandarepublishedintheformofstandards,technicalspecifications,technicalreportsorguidesandtheyareacceptedbytheNationalCommitteesinthatsense.4)Inordertopromoteinternationalunification,IECNationalCommitteesundertaketoapplyIECInternationalStandardstransparentlytothemaximumextentpossibleintheirnationalandregionalstandards.AnydivergencebetweentheIECStandardandthecorrespondingnationalorregionalstandardshallbeclearlyindicatedinthelatter.5)TheIECprovidesnomarkingproceduretoindicateitsapprovalandcannotberenderedresponsibleforanyequipmentdeclaredtobeinconformitywithoneofitsstandards.6)AttentionisdrawntothepossibilitythatsomeoftheelementsofthisInternationalStandardmaybethesubjectofpatentrights.TheIECshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.InternationalStandardIEC60958-4hasbeenpreparedbyIECtechnicalcommittee100:Audio,videoandmultimediasystemsandequipment.ThissecondeditionofIEC60958-4cancelsandreplacesthefirsteditionpublishedin1999andconstitutesatechnicalrevision.Thetextofthisstandardisbasedonthefollowingdocuments:FDISReportonvoting100/643/FDIS100/669/RVDFullinformationonthevotingfortheapprovalofthisstandardcanbefoundinthereportonvotingindicatedintheabovetable.ThispublicationhasbeendraftedinaccordancewiththeISO/IECDirectives,Part2.Themainchangeswithrespecttothepreviousedition(1999)arelistedbelow.−ThescopespecifiestheprofessionalapplicationofIEC60958-1(generalitieshavebeenremovedtoanintroduction).−Aclauseontermsanddefinitionshasbeenadded.−InTable1,expandedchannelstatusassignmentshavebeenaddedandchannelstatusdefinitionsexpandedtoaccommodateextendedsamplingfrequencies,indicationofalignmentlevelandmulti-channeloptions.–2–−Figure1andassociatedtexthasbeenrevisedtobemoregeneralized.Threenotesoncableperformancefactorshavebeenadded.−Theimpedancespecificationisnowdependentonmaximumframerate.−Thecommon-modebalancespecificationisnowdependentonmaximumframerate−Theimpedancespecificationisnowdependentonmaximumframerate.IEC60958consistsofthefollowingpartsunderthegenerictitleDigitalaudiointerface:Part1:GeneralPart3:ConsumerapplicationsPart4:ProfessionalapplicationsThecommitteehasdecidedthatthispublicationremainsvaliduntilSeptember2005.Atthisdate,inaccordancewiththecommittee’sdecision,thepublicationwillbe•reconfirmed;•withdrawn;•replacedbyarevisededition,or•amended.CONTENTSINTRODUCTION.....................................................................................................................41Scope...............................................................................................................................52Normativereferences........................................................................................................53Termsanddefinitions.......................................................................................................54Interfaceformat................................................................................................................54.1General...................................................................................................................54.2Validitybit.........................................