【英文标准名称】:Digitallivingnetworkalliance(DLNA)homenetworkeddeviceinteroperabilityguidelines-Part2:DLNAmediaformats
【原文标准名称】:数字生活网络联盟(DLNA)家用网络装置互用性指南.第2部分:DLNA媒体格式
【标准号】:IEC62481-2-2007
【标准状态】:现行
【国别】:国际
【发布日期】:2007-08
【实施或试行日期】:
【发布单位】:国际电工委员会(IEC)
【起草单位】:IEC/TC100
【标准类型】:()
【标准水平】:()
【中文主题词】:适配器;音频的;电路网络;通信;通信系统;兼容性;压缩;数据压缩;数据交换;数据格式;数据传送;定义;装置配置;电气工程;娱乐电子学;(数据)格式;指南;家用网络;信息交换;接口;因特网协议;互用性;媒体格式;多媒体;网络管理;信号传输;软件;规范(验收);远程通信;视频
【英文主题词】:Adapters;Audio;Circuitnetworks;Communication;Communicationsystems;Compatibility;Compression;Computersoftware;Datacompression;Dataexchange;Dataformats;Datatransfer;Definition;Definitions;Deviceconfiguration;Electricalengineering;Englishlanguage;Entertainmentelectronics;Formats;Guidelines;Homenetwork;Informationinterchange;Interfaces;Interfaces(dataprocessing);InternetProtocol;Interoperability;Mediaformats;Multimedia;Networkmanagement;Signaltransmission;Software;Specification(approval);Telecommunications;Video
【摘要】:ThispartofIEC62481specifiestheDLNAmediaformatprofilesapplicabletoIEC62481-1.Mediaformatprofilesaredefinedforeachofthefollowingmediaclasses:audio,image,andAV.Inaddition,profileIDvaluesthatidentifymediacollectionsandprinterXHTMLdocumentsarealsointroduced.Itisenvisionedthatinthehomenetworkenvironment,deviceswillbecapableofexchangingcontentitemsthatoriginatefromdifferentsources.Contentitemswilltypicallycomeencodedindifferentformats.Theterm"format"designatesthecompressionandencodingtoolsutilizedtogeneratethebinaryinstanceofacontentitem,whichwillbeeventuallyexchangedoverthehomenetworkusingstreamingorfiletransferprotocols.ExamplesofformatsincludeMPEG-2,MPEG-4,WMVandothersforvideo;orMP3,AAC,WMAandothersforaudio.Formatsalone,however,includeaspartoftheirspecifications,multipleparameters,featuresandtoolswhichcanbeusedinamyriadofcombinationstogeneratecontentbinaries.Inthisstandard,thenotionofaformatprofileisintroducedtoidentifyaparticularsuitablecombinationofformatparameterswhichdefineawayforrepresentingcontentbinaries.AformatlikeMPEG-2,forexample,canhavemultipleprofilesdependingonselectionsforthecompanionaudio,thesystem-layermultiplexingspecifications,allowedframeresolutions,allowedaspectratios,allowedbitrates,etc.Thisstandardprovidesaquasi-exhaustivelistofbroadly-usedformatprofilesforimage,audio,andAVformats.Foreachparticularformatprofile,thisstandarddefinesaprofileIDtexttokentobeusedduringtheDLNAmediadiscoveryandmediatransferoperations.TheprofileIDisexposedinaserver'scontentdirectoryservice(CDS)tosignaltopotentialnetworkedplayersorrendererstheexistenceofacontentitemwithparticularcodingandcompressionfeaturesdefinedpreciselybytheitem'sprofileID.ThisstandardalsodescribestheusesofformatprofileswhichdefinemediacollectionsandprinterXHTMLdocuments.Thenumberofpotentialcombinationsforsuitableprofilesbecomeslargeratherquickly,asevidencedbythelongprofilelistsobservedinthedifferentsectionsofthisstandard.Consequently,thisstandardintroducesthenotionofmandatoryprofiles,supportedbyalldevices,asameanstoprovidebaselinecontentinteroperabilityinthehome.Servershavetobecapableofexposingandtransferringmandatoryprofileswhileplayersandrenderershavetobecapableofdecodingandrenderingthemandatoryprofiles.Unfortunately,mandatoryformatprofilescannotbedefineduniversallytosuitallscenarios.Forthisreason,thedefinitionofmandatoryprofilesismadetakingintoaccountthegeographicalregionandthetargetdevicecategory.
【中国标准分类号】:M11
【国际标准分类号】:33_160;35_100_05;35_110
【页数】:240P.;A4
【正文语种】:英语
基本信息
标准名称: | 真空法微碳铬铁 |
英文名称: | Vacuum extra low carbon ferrochrome |
中标分类: |
冶金 >>
钢铁产品 >>
铁合金 |
ICS分类: |
冶金 >>
铁合金
|
替代情况: | 替代GB 5684-1985;被GB/T 5683-2008代替 |
发布部门: | 中华人民共和国冶金工业部 |
发布日期: | 1987-07-23 |
实施日期: | 1988-07-01 |
首发日期: | 1985-12-04 |
作废日期: | 2009-04-01 |
主管部门: | 中国钢铁工业协会 |
提出单位: | 中华人民共和国冶金工业部 |
归口单位: | 全国钢标准化技术委员会 |
起草单位: | 吉林铁合金厂 |
起草人: | 常镇有、王成化、舒莉 |
出版社: | 中国标准出版社 |
出版日期: | 1900-01-01 |
页数: | 2页 |
适用范围
本标准适用J几炼钢中作为合金元素加入剂用的真空法微碳铬铁
前言
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目录
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引用标准
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所属分类: 冶金 钢铁产品 铁合金 冶金 铁合金