【英文标准名称】:Informationtechnology-Codingofaudio-visualobjects-Part4:Conformancetesting
【原文标准名称】:信息技术.音频-可视对象的编码.第4部分:一致性测试
【标准号】:ISO/IEC14496-4-2004
【标准状态】:现行
【国别】:国际
【发布日期】:2004-12-01
【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/SC29
【标准类型】:()
【标准水平】:()
【中文主题词】:尺寸;代码表示;多媒体;合格试验;数据处理;编码(数据转换);编码;对象;声信号;信息技术;视频信号;计算机制图;信息交换;图像处理
【英文主题词】:Acousticsignals;Codedrepresentation;Coding(dataconversion);Computergraphics;Conformity;Conformitytesting;Dataprocessing;Encoding;Formats;Imageprocessing;Informationinterchange;Informationtechnology;Multimedia;Object;Videosignals
【摘要】:ThispartofISO/IEC14496specifieshowtestscanbedesignedtoverifywhetherbitstreamsanddecodersmeetrequirementsspecifiedinparts1,2and3ofISO/IECIEC14496andforpart6ofISO/IEC14496itspecifieshowtestscanbedesignedforbitstreamdeliveryovervariousdeliverytechnologiesinaninteroperabletransparentmannertoparts1,2and3.InthispartofISO/IEC14496,encodersarenotaddressedspecifically.AnencodermaybesaidtobeanISO/IEC14496encoderifitgeneratesbitstreamscompliantwiththesyntacticandsemanticbitstreamrequirementsspecifiedinparts1,2and3ofISO/IEC14496.Characteristicsofcodedbitstreamsanddecodersaredefinedforparts1,2and3ofISO/IEC14496.Thecharacteristicsofabitstreamdefinethesubsetofthestandardthatisexploitedinthebitstream.Examplesaretheappliedvaluesorrangeofthepicturesizeandbitrateparameters.Decodercharacteristicsdefinethepropertiesandcapabilitiesoftheapplieddecodingprocess.Anexampleofapropertyistheappliedarithmeticaccuracy.Thecapabilitiesofadecoderspecifywhichcodedbitstreamsthedecodercandecodeandreconstruct,bydefiningthesubsetofthestandardthatmaybeexploitedindecodablebitstreams.Abitstreamcanbedecodedbyadecoderifthecharacteristicsofthecodedbitstreamarewithinthesubsetofthestandardspecifiedbythedecodercapabilities.Proceduresaredescribedfortestingconformanceofbitstreamsanddecoderstotherequirementsdefinedinparts1,2and3ofISO/IEC14496.Giventhesetofcharacteristicsclaimed,therequirementsthatmustbemetarefullydeterminedbyparts1,2and3ofISO/IEC14496.ThispartofISO/IEC14496summarisestherequirements,crossreferencesthemtocharacteristics,anddefineshowconformancewiththemcanbetested.Guidelinesaregivenonconstructingteststoverifybitstreamanddecoderconformance.Thisdocumentgivesguidelinesonhowtoconstructbitstreamtestsuitestocheckorverifydecoderconformance.Inaddition,sometestbitstreamsimplementedaccordingtothoseguidelinesareprovidedasanelectronicannextothisdocument.Theproceduresandsignalingmessagesforsessionandchannelestablishmentaredefinedinpart6ofISO/IEC14496.ConformancewiththesignalingmessagesandproceduresinthispartofISO/IEC14496aredefinedinaccordancetothespecificationsinpart6ofISO/IEC14496.ThisspecificationallowsthemanufacturertoidentifytheconformanceofthesignalingmessageinastaticreviewandprovidesabstracttestcasestotesttheconformancetotheproceduresinadynamicreviewofanimplementationasdefinedinISO/IEC9646ConformanceTestingstandard.
【中国标准分类号】:L81
【国际标准分类号】:35_040
【页数】:308P.;A4
【正文语种】:英语


【英文标准名称】:Plastics-Acrylonitrile-styrene-acrylate(ASA),acrylonitrile-(ethylene-propylene-diene)-styrene(AEPDS)andacrylonitrile-(chlorinatedpolyethylene)-styrene(ACS)mouldingandextrusionmaterials-Part1:Designationsystemandbasisforspecifications
【原文标准名称】:塑料.丙烯腈-苯乙烯-丙烯酸酯、丙烯腈-(乙烯-丙烯-二烯烃)-苯乙烯和丙烯腈-(氯化聚乙烯)-苯乙烯模制和挤压材料.第1部分:命名系统和基本规范
【标准号】:ISO6402-1-2002
【标准状态】:现行
【国别】:国际
【发布日期】:2002-10
【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/TC61
【标准类型】:()
【标准水平】:()
【中文主题词】:模制材料;名称与符号;模塑材料;冲击强度;丙烯腈;抗冲击;塑料;丙烯腈-苯乙烯;聚苯乙烯;分类;识别方法;共聚物;规范;分类系统;苯乙烯;丙烯腈-苯乙烯-丙烯酸酯共聚物;命名体制;材料;二烯烃;挤压;热塑性聚合物;定义;作标记;AES;丙烯酸类树脂;酯;ASA模塑材料;编码;ACS;特性;基础
【英文主题词】:Acrylicresins;Acrylonitrile;Acrylonitrile-styrene;ACS;AES;ASA;ASAmouldingmaterial;Basis;Classification;Classificationsystems;Copolymers;Definitions;Designationsystems;Designations;Dienes;Encoding;Esters;Extruding;Identificationmethods;Impactresistant;Impactstrength;Marking;Materials;Mouldingmaterials;Mouldings(shapedsection);Plastics;Polystyrene;Properties;Specification;Specifications;Styrene;Thermoplasticpolymers
【摘要】:1ThispartofISO6402establishesasystemofdesignationforacrylonitrile-styrene-acrylate(ASA),acrylonitrile-(ethylene-propylene-diene)-styrene(AEPDS)andacrylonitrile-(chlorinatedpolyethylene)-styrene(ACS)mouldingandextrusionmaterials,whichmaybeusedasthebasisforspecifications.2ThetypesofASA,AEPDSandACSplasticaredifferentiatedfromeachotherbyaclassificationsystembasedonappropriatelevelsofthedesignatorypropertiesa)Vicatsofteningtemperatureb)meltvolume-flowratec)Charpynotchedimpactstrengthd)tensilemodulusandoninformationaboutcomposition,intendedapplicationand/ormethodofprocessing,importantproperties,additives,colorants,fillersandreinforcingmaterials.3ThispartofISO6402isapplicabletoallASA,AEPDSandACSmaterialsconsistingofacontinuousphasebasedmainlyonstyrene-acrylonitrile(SAN)copolymer(inwhichthestyrenecomponentmaybestyreneitselfand/oralkyl-substitutedstyrene)andadispersedelastomericphasebasedmainlyonacrylate(ASAmaterials),ethylene-propylene-diene(EPDM)(AEPDSmaterials),chlorinatedpolyethylene(ACSmaterials),withorwithoutothercomponents,insuchquantitiesasspecifiedindatablock1.ItappliestoASA,AEPDSandACSmaterialsreadyfornormaluseintheformofpowder,granules,pelletsorchips,unmodifiedormodifiedbycolorants,additives,fillers,etc.ISO6402-1:2002doesnotapplytomaterialsa)containinglessthan10%bymassofacrylonitrileinthecontinuousphase;b)withaCharpynotchedimpactstrengthoflessthan3kilojoulespersquaremetre;c)containinglessthan50%bymassofacrylateintheelastomericphaseinthecaseofASA;d)containinglessthan50%bymassofethylene-propylene-dieneintheelastomericphaseinthecaseofAEPDS;e)containinglessthan50%bymassofchlorinatedpolyethyleneintheelastomericphaseinthecaseofACS.4Itisnotintendedtoimplythatmaterialshavingthesamedesignationgivenecessarilythesameperformance.ThispartofISO6402doesnotprovideengineeringdata,performancedataordataonprocessingconditionswhichmayberequiredtospecifyamaterialforaparticularapplicationand/ormethodofprocessing.Ifsuchadditionalpropertiesarerequired,theyshallbedeterminedinaccordancewiththetestmethodsspecifiedinpart2ofthisInternationalStandard,ifsuitable.5Inordertospecifyathermoplasticmaterialforparticularapplicationortoensurereproducibleprocessing,additionalrequirementsmaybegivenindatablock5(see3.1).
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:8P;A4
【正文语种】:英语