1、NORME INTERNATIONALE CEI IEC INTERNATIONAL STANDARD 607742 Premiredition Firstedition 199911 Systmedemagntoscopecassettebalayage hlicodalutilisantlabandemagntiquede 12,65mm(0,5in)deformatVHS Partie2: EnregistrementaudioMF Helicalscanvideotapecassettesystemusing 12,65mm(0,5in)magnetictapeontypeVHS Pa
2、rt2: FMaudiorecording Numroderfrence Referencenumber CEI/IEC607742:1999Numrosdespublications Depuisle1erjanvier1997,lespublicationsdelaCEI sontnumrotespartirde60000. Publicationsconsolides Lesversionsconsolidesdecertainespublicationsde laCEIincorporantlesamendementssontdisponibles. Parexemple,lesnum
3、rosddition1.0,1.1et1.2 indiquentrespectivementlapublicationdebase,la publicationdebaseincorporantlamendement1,etla publicationdebaseincorporantlesamendements1 et2. Validitdelaprsentepublication LecontenutechniquedespublicationsdelaCEIest constammentrevuparlaCEIafinquilreflteltat actueldelatechnique.
4、 Desrenseignementsrelatifsladatedereconfir mationdelapublicationsontdisponiblesdansle CataloguedelaCEI. Lesrenseignementsrelatifsdesquestionsltudeet destravauxencoursentreprisparlecomittechnique quiatablicettepublication,ainsiquelalistedes publicationstablies,setrouventdanslesdocumentsci dessous: Si
5、tewebdelaCEI* CataloguedespublicationsdelaCEI Publiannuellementetmisjour rgulirement (Catalogueenligne)* BulletindelaCEI DisponiblelafoisausitewebdelaCEI* etcommepriodiqueimprim Terminologie,symbolesgraphiques etlittraux Encequiconcernelaterminologiegnrale,lelecteur sereporteralaCEI60050: Vocabulair
6、eElectro techniqueInternational (VEI). Pourlessymbolesgraphiques,lessymboleslittraux etlessignesdusagegnralapprouvsparlaCEI,le lecteurconsulteralaCEI60027: Symboleslittraux utiliserenlectrotechnique,laCEI60417:Symboles graphiquesutilisablessurlematriel.Index,relevet compilationdesfeuillesindividuell
7、es, etlaCEI60617: Symbolesgraphiquespourschmas. * Voiradressesitewebsurlapagedetitre. Numbering Asfrom1January1997allIECpublicationsare issuedwithadesignationinthe60000series. Consolidatedpublications ConsolidatedversionsofsomeIECpublications includingamendmentsareavailable.Forexample, editionnumber
8、s1.0,1.1and1.2refer,respectively,to thebasepublication,thebasepublicationincor poratingamendment1andthebasepublication incorporatingamendments1and2. Validityofthispublication ThetechnicalcontentofIECpublicationsiskept underconstantreviewbytheIEC,thusensuringthat thecontentreflectscurrenttechnology.
9、Informationrelatingtothedateofthereconfirmation ofthepublicationisavailableintheIECcatalogue. Informationonthesubjectsunderconsiderationand workinprogressundertakenbythetechnical committeewhichhaspreparedthispublication,aswell asthelistofpublicationsissued,istobefoundatthe followingIECsources: IECwe
10、bsite* CatalogueofIECpublications Publishedyearlywithregularupdates (Onlinecatalogue)* IECBulletin AvailablebothattheIECwebsite*and asaprintedperiodical Terminology,graphicalandletter symbols Forgeneralterminology,readersarereferredto IEC60050:InternationalElectrotechnicalVocabulary (IEV). Forgraphi
11、calsymbols,andlettersymbolsandsigns approvedbytheIECforgeneraluse,readersare referredtopublicationsIEC60027: Lettersymbolsto beusedinelectricaltechnology ,IEC60417: Graphical symbolsforuseonequipment.Index,surveyand compilationofthesinglesheets andIEC60617: Graphicalsymbolsfordiagrams. * Seewebsitea
12、ddressontitlepage.NORME INTERNATIONALE CEI IEC INTERNATIONAL STANDARD 607742 Premiredition Firstedition 199911 Systmedemagntoscopecassettebalayage hlicodalutilisantlabandemagntiquede 12,65mm(0,5in)deformatVHS Partie2: EnregistrementaudioMF Helicalscanvideotapecassettesystemusing 12,65mm(0,5in)magnet
13、ictapeontypeVHS Part2: FMaudiorecording Commission Electrotechnique Internationale InternationalElectrotechnicalCommission Pourprix,voircatalogueenvigueur Forprice,seecurrentcatalogue IEC1999Droitsdereproductionrservs Copyrightallrightsreserved Aucunepartiedecettepublicationnepeuttrereproduiteni uti
14、lisesousquelqueformequecesoitetparaucunprocd, lectroniqueoumcanique,ycomprislaphotocopieetles microfilms,sanslaccordcritdelditeur. Nopartofthispublicationmaybereproducedorutilizedin anyformorbyanymeans,electronicormechanical, includingphotocopyingandmicrofilm,withoutpermissionin writingfromthepublis
15、her. InternationalElectrotechnicalCommission 3,ruedeVarembGeneva,Switzerland Telefax:+41229190300 email:inmailiec.ch IECwebsite http:/www.iec.ch CODEPRIX PRICECODE L2 607742CEI:1999 SOMMAIRE Pages AVANTPROPOS .4 Articles 1 Domainedapplication 8 2 Rfrencesnormatives. 8 3 Mthodedenregistrement 8 4 Con
16、figurationmcanique 8 4.1 DispositiondespistesaudioMF 8 4.2 Anglesdazimutdesttes 10 4.3 Diffrencedetempsdenregistrement . 10 5 Caractristiquesdelenregistrement. 10 5.1 Rductiondubruit. 10 5.2 Praccentuation 10 5.3 Frquencecentraledelaporteuse 12 5.4 Excursiondefrquence. 12 5.5 Polaritdelamodulation.
17、12 5.6 Niveaudenregistrement 12 6 Autressujets(voieutilisepourlesapplications) 12 AnnexeA(normative)Mthodedemesureducodeurtransitoire 20 Figure1Dispositiondespistes 14 Figure2Rponseenfrquencedelapraccentuation . 14 Figure3Spectredusignal . 16 Figure4SchmasynoptiquedusystmedenregistrementaudioMF 16 F
18、igure5Schmasynoptiquedusystmederductiondebruit. 18 FigureA.1Mthodedemesureducodeurtransitoire 20 Tableau1DimensionsdelapisteaudioMF . 10 Tableau2Anglesdazimutdesttes 10 Tableau3Frquencescentralesdelaporteuse . 12 Tableau4Voieutilisepourlesapplications 12607742IEC:1999 3 CONTENTS Page FOREWORD 5 Clau
19、se 1 Scope 9 2 Normativereferences. 9 3 Recordingmethod 9 4 Mechanicalconfiguration 9 4.1 FMaudiotrackpattern 9 4.2 Headazimuthangles. 11 4.3 Recordingtimedifference . 11 5 Recordingcharacteristics . 11 5.1 Noisereduction. 11 5.2 Preemphasis 11 5.3 Carriercentrefrequency 13 5.4 Frequencydeviation 13
20、 5.5 Modulationpolarity 13 5.6 Recordinglevel . 13 6 Othersubjects(channelapplication). 13 AnnexA(normative)Encodertransientmeasurementmethod 21 Figure1Trackarrangement. 15 Figure2Preemphasisfrequencyresponse 15 Figure3Signalspectrum . 17 Figure4BlockdiagramofFMaudiorecording . 17 Figure5Blockdiagra
21、mofnoisereductionsystem 19 FigureA.1Encodertransientmeasurementmethod . 21 Table1FMaudiotrackdimensions 11 Table2Headazimuthangles. 11 Table3Carriercentrefrequencies. 13 Table4Channelapplications . 134 607742CEI:1999 COMMISSIONLECTROTECHNIQUEINTERNATIONALE _ SYSTMEDEMAGNTOSCOPECASSETTE BALAYAGEHLICO
22、DALUTILISANTLABANDEMAGNTIQUE DE12,65mm(0,5in)DEFORMATVHS Partie2:EnregistrementaudioMF AVANTPROPOS 1) LaCEI(CommissionlectrotechniqueInternationale)estuneorganisationmondialedenormalisationcompose delensembledescomitslectrotechniquesnationaux(ComitsnationauxdelaCEI).LaCEIapourobjetde favoriserlacoop
23、rationinternationalepourtouteslesquestionsdenormalisationdanslesdomainesde llectricitetdellectronique.Aceteffet,laCEI,entreautresactivits,publiedesNormesinternationales. Leurlaborationestconfiedescomitsdtudes,auxtravauxdesquelstoutComitnationalintressparle sujettraitpeutparticiper.Lesorganisationsin
24、ternationales,gouvernementalesetnongouvernementales,en liaisonaveclaCEI,participentgalementauxtravaux.LaCEIcollaboretroitementaveclOrganisation InternationaledeNormalisation(ISO),selondesconditionsfixesparaccordentrelesdeuxorganisations. 2) LesdcisionsouaccordsofficielsdelaCEIconcernantlesquestionst
25、echniquesreprsentent,danslamesure dupossible,unaccordinternationalsurlessujetstudis,tantdonnquelesComitsnationauxintresss sontreprsentsdanschaquecomitdtudes. 3) Lesdocumentsproduitsseprsententsouslaformederecommandationsinternationales.Ilssontpublis commenormes,spcificationstechniques,rapportstechni
26、quesouguidesetagrscommetelsparlesComits nationaux. 4) Danslebutdencouragerlunificationinternationale,lesComitsnationauxdelaCEIsengagentappliquerde faontransparente,danstoutelamesurepossible,lesNormesinternationalesdelaCEIdansleursnormes nationalesetrgionales.ToutedivergenceentrelanormedelaCEIetlanor
27、menationaleourgionale correspondantedoittreindiqueentermesclairsdanscettedernire. 5) LaCEInafixaucuneprocdureconcernantlemarquagecommeindicationdapprobationetsaresponsabilit nestpasengagequandunmatrielestdclarconformelunedesesnormes. 6)LattentionestattiresurlefaitquecertainsdeslmentsdelaprsenteNorme
28、internationalepeuventfaire lobjetdedroitsdepropritintellectuelleoudedroitsanalogues.LaCEInesauraittretenuepour responsabledenepasavoiridentifidetelsdroitsdepropritetdenepasavoirsignalleurexistence. LaNormeinternationaleCEI607742attablieparlesouscomit100B:Systmesde stockagedinformationsmultimdia,vido
29、etaudio,ducomitdtudes100delaCEI: Systmesetappareilsaudio,vidoetmultimdia. CettepremireditiondelaCEI607742annuleetremplacelaCEI61054,parueen1991, dontelleconstitueunervisiontechnique. Letextedecettenormeestissudesdocumentssuivants: FDIS Rapportdevote 100B/234/FDIS 100B/246/RVD Lerapportdevoteindiquda
30、nsletableaucidessusdonnetouteinformationsurlevoteayant aboutilapprobationdecettenorme. CettepublicationatrdigeselonlesDirectivesISO/CEI,Partie3. LannexeAfaitpartieintgrantedecettenorme.607742IEC:1999 5 INTERNATIONALELECTROTECHNICALCOMMISSION _ HELICALSCANVIDEOTAPECASSETTESYSTEM USING12,65mm(0,5in)MA
31、GNETICTAPEONTYPEVHS Part2:FMaudiorecording FOREWORD 1) TheIEC(InternationalElectrotechnicalCommission)isaworldwideorganizationforstandardizationcomprising allnationalelectrotechnicalcommittees(IECNationalCommittees).TheobjectoftheIECistopromote internationalcooperationonallquestionsconcerningstandar
32、dizationintheelectricalandelectronicfields.To thisendandinadditiontootheractivities,theIECpublishesInternationalStandards.Theirpreparationis entrustedtotechnicalcommittees;anyIECNationalCommitteeinterestedinthesubjectdealtwithmay participateinthispreparatorywork.International,governmentalandnongover
33、nmentalorganizationsliaising withtheIECalsoparticipateinthispreparation.TheIECcollaboratescloselywiththeInternationalOrganization forStandardization(ISO)inaccordancewithconditionsdeterminedbyagreementbetweenthetwo organizations. 2) TheformaldecisionsoragreementsoftheIEContechnicalmattersexpress,asne
34、arlyaspossible,an internationalconsensusofopinionontherelevantsubjectssinceeachtechnicalcommitteehasrepresentation fromallinterestedNationalCommittees. 3) Thedocumentsproducedhavetheformofrecommendationsforinternationaluseandarepublishedintheform ofstandards,technicalspecifications,technicalreportso
35、rguidesandtheyareacceptedbytheNational Committeesinthatsense. 4)Inordertopromoteinternationalunification,IECNationalCommitteesundertaketoapplyIECInternational Standardstransparentlytothemaximumextentpossibleintheirnationalandregionalstandards.Any divergencebetweentheIECStandardandthecorrespondingnat
36、ionalorregionalstandardshallbeclearly indicatedinthelatter. 5)TheIECprovidesnomarkingproceduretoindicateitsapprovalandcannotberenderedresponsibleforany equipmentdeclaredtobeinconformitywithoneofitsstandards. 6)AttentionisdrawntothepossibilitythatsomeoftheelementsofthisInternationalStandardmaybethesu
37、bject ofpatentrights.TheIECshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights. InternationalStandardIEC607742hasbeenpreparedbysubcommittee100B:Audio,video andmultimediainformationstoragesystems,ofIECtechnicalcommittee100:Audio,videoand multimediasystemsandequipment. ThisfirsteditionofIE
38、C607742cancelsandreplacesIEC61054,publishedin1991,and constitutesatechnicalrevision. Thetextofthisstandardisbasedonthefollowingdocuments: FDIS Reportonvoting 100B/234/FDIS 100B/246/RVD Fullinformationonthevotingfortheapprovalofthisstandardcanbefoundinthereporton votingindicatedintheabovetable. Thisp
39、ublicationhasbeendraftedinaccordancewiththeISO/IECDirectives,Part3. AnnexAformsanintegralpartofthisstandard.6 607742CEI:1999 LaCEI60774estcomposedeplusieurspartiesprsentessousletitregnral: Systmede magntoscopecassettebalayagehlicodalutilisantlabandemagntiquede12,65mm (0,5in)deformatVHS: Partie1:Syst
40、medecassettevidoVHSetVHScompacte; Partie2:EnregistrementaudioMF; Partie3:SVHS. Lecomitadcidquecettepublicationrestevalablejusquen2005. Acettedate,selondcisionpralableducomit,lapublicationsera reconduite; supprime; remplaceparuneditionrvise,ou amende.607742IEC:1999 7 IEC60774consistsofseveralpartsund
41、erthegeneraltitle:Helicalscanvideotapecassette systemusing12,65mm(0,5in)magnetictapeontypeVHS: Part1:VHSandcompactVHSvideocassettesystem; Part2:FMaudiorecording; Part3:SVHS. Thecommitteehasdecidedthatthispublicationremainsvaliduntil2005. Atthisdate,inaccordancewiththecommitteesdecision,thepublicatio
42、nwillbe reconfirmed; withdrawn; replacedbyarevisededition,or amended.8 607742CEI:1999 SYSTMEDEMAGNTOSCOPECASSETTE BALAYAGEHLICODALUTILISANTLABANDEMAGNTIQUE DE12,65mm(0,5in)DEFORMATVHS Partie2:EnregistrementaudioMF 1 Domainedapplication LaprsentepartiedelaCEI60774sappliquelenregistrementaudioenmodulationde frquence(MF)quiesttotalementcompatibleaveclesystmeVHSdfinidanslaCEI607741. Lobjetdecetten
