【英文标准名称】:Informationtechnology-Multimediacontentdescriptioninterface-Part4:Audio
【原文标准名称】:信息技术.多媒体内容描述界面.第4部分:音频
【标准号】:ISO/IEC15938-4-2002
【标准状态】:现行
【国别】:国际
【发布日期】:2002-06
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/IECJTC1
【标准类型】:()
【标准水平】:()
【中文主题词】:数据表示;定义;定义;信息技术;数据处理;多媒体;信息交换;界面;数据编码;
【英文主题词】:Audio;Dataenciphering;Dataprocessing;Datarepresentation;Definitions;Informationinterchange;Informationtechnology;Interfaces;Multimedia
【摘要】:1DefinitionofScopeThisInternationalStandarddefinesaMultimediaContentDescriptionInterface,specifyingaseriesofinterfacesfromsystemtoapplicationleveltoallowdisparatesystemstointerchangeinformationaboutmultimediacontent.Itdescribesthearchitectureforsystems,alanguageforextensionsandspecificapplications,descriptiontoolsintheaudioandvisualdomains,aswellastoolsthatarenotspecifictoaudio-visualdomains.Asawhole,thisInternationalStandardencompassingalloftheaforementionedcomponentsisknownas“MPEG-7.”MPEG-7isdividedintoeightparts(asdefinedintheForeword).ThispartoftheMPEG-7Standard(Part4:Audio)specifiesdescriptiontoolsthatpertaintomultimediaintheaudiodomain.Seebelowforfurtherdetailsofapplication.ThispartoftheMPEG-7Standardisintendedtobeimplementedinconjunctionwithotherpartsofthestandard.Inparticular,MPEG-7Part4:AudioassumesknowledgeofPart2:DescriptionDefinitionLanguage(DDL)initsnormativesyntacticdefinitionsofDescriptorsandDescriptionSchemes.ThispartofthestandardalsohasdependenciesuponclausesinPart5:MultimediaDescriptionSchemes,namelymanyofthefundamentalDescriptionSchemesthatextendthebasictypecapabilitiesoftheDDL.MPEG-7isanextensiblestandard.ThemethodtoextendthestandardbeyondtheDescriptionSchemesprovidedinthestandardistodefinenewonesintheDDL,andtomakethoseDSsavailablewiththeinstantiateddescriptions.FurtherdetailsareavailableinPart2.Toavoidduplicatefunctionalitywithotherpartsofthestandard,theDDListheonlyextensionfacilityprovided.2FieldsofapplicationMPEG-7Part4:Audioisapplicabletoallformsofaudiocontent.Theencodingformatormediumofthesaidaudioisnotlimitedinanyway,andmayincludeaudioheldinananaloguemediumsuchasmagnetictapeoropticalfilm.Thecontentoftheaudioisnotlimitedwithinorwithoutmusic,speech,soundeffects,soundtracks,oranymixturesthereof.ThetoolslistedinthispartoftheInternationalStandardareapplicabletobothaudioinisolationandtoaudioassociatedwithvideo.ThespecifictoolsprovidedwithintheAudioportionofthestandardaredesignedtoworkinconjunctionwiththeMultimediaDescriptionSchemesthatapplytobothaudioandvideo.Becauseofthe“toolbox”natureofthestandard,themostappropriatetoolsfromthedifferentpartsofthestandardmaybemixed,withintheconstraintsoftheDDL.TheMPEG-7Audiotoolsareapplicabletotwogeneralareas:low-levelaudiodescription,inthecaseoftheAudioFramework(clause5),andapplication-drivendescription,inthecaseoftheHighLevelTools(clause6).TheAudioFrameworktoolsareapplicabletogeneralaudio,withoutregardtothespecificcontentcarriedbytheencodedsignal.TheScalableSeriesprovidesgeneralcapabilitiesformulti-levelsampleddata.TheAudioDescriptionFrameworkdefinesspecificdescriptorsforusewiththeScalableSeriesorwithAudioSegments,whichhaspropertiesinheritedfromthegeneralSegmentdescribedintheMultimediaDescriptionSchemespartofthestandard.TheSilenceDescriptorworkswiththeSegmentdescriptor,andisapplicableacrossallpossibleaudiosignals.Thehighleveldescriptiontoolsareapplicabletospecifictypesofcontentwithinaudio.Thespecificdomainsarewelldocumentedwithintheintroductiontoeachsub-clause.TheaudiodomainsencompassedbythevariousMPEG-7Audiotoolsarespeech,soundeffects,musicalinstruments,melodieswithinmusicandgeneralaudiorecognition.Thesespecialisedtoolsmaybeemployedinconjunctionwiththeothertoolswithinthestandard.
【中国标准分类号】:L81
【国际标准分类号】:35_040
【页数】:114P.;A4
【正文语种】:英语