【英文标准名称】:Unplasticizedpolyvinylchloride(PVC)pipes;Waterabsorption;Determinationandspecification
【原文标准名称】:未增塑聚氯乙烯(PVC)管.吸水性.测定和规范
【标准号】:ISO2508-1974
【标准状态】:作废
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【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:
【国际标准分类号】:
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【英文标准名称】:Alarmsystems.CCTVsurveillancesystemsforuseinsecurityapplications.Videotransmission
【原文标准名称】:报警系统.闭路电视(CCTV)安全性监控系统.视频传输
【标准号】:BSEN50132-5-2001
【标准状态】:作废
【国别】:英国
【发布日期】:2001-09-05
【实施或试行日期】:2001-09-05
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:警报装置;报警系统;防偷窃措施;应用规则;闭路电视;犯罪预防装置;数据传送;定义(术语);电气工程;环境测试;信息系统;安装;维护;监视装置;运行监控系统;性能测试;安全性工程;建筑物内安全系统;建筑物安全系统;信号传输;规范(验收);语音传输;监督(认可);监视系统;电视接收机;电视系统;电视发射机;试验;视频;电视工程;视频记录;视频信号记录;视频信号;视频发射机
【英文主题词】:Alarmdevices;Alarmsystems;Anti-burglarmeasures;Applicationrule;Closed-circuittelevision;Crimepreventiondevices;Datatransfer;Definitions;Electricalengineering;Environmentaltesting;Informationsystems;Installations;Maintenance;Monitoringdevice;Operationalmonitoringsystems;Performancetesting;Safetyengineering;Securitiessystemsinbuildings;Securitysystemsinbuildings;Signaltransmission;Specification(approval);Speechtransmission;Surveillance(approval);Surveillancesystems;Televisionreceivers;Televisionsystems;Televisiontransmitters;Testing;Video;Videoengineering;Videorecording;Videosignalrecording;Videosignals;Videotransmitter
【摘要】:Thisstandardspecifiestheminimumrequirementsforthespecificationandtestingoftheperformanceofavideotransmissionchannelinvolvingtransmitter,receiverorintermediatedevicesassociatedwiththeselectedtransmissionmedia,foruseinCCTVsurveillancesystems.Videotransmissionequipmentmaybecombinedwithadditionalfunctions,e.g.foraudioordatatransmission.Thesefunctionsarenotincludedinthisstandard.ThisstandardcoversthetransmissionofcolourandblackandwhitevideosignalsinaccordancewithCCIRReport624-4,625lines,50fieldspersecond.Thisstandardisnotapplicablefortransmissionsystemswhichuseinthewholesystemorinpartsthereofcompressedvideosignalsinanyway.NOTECompressiontechniquesusemethodstomatchtheinformationcontentofsignalstothebestchannelcapacity.Thevarioustestsignalsofthisstandardappliedondifferentmethodstocompressvideosignalscansupplyresultswhichmeettherequirementsofthisstandard.However,itshouldnotbeconcludedfromsuchresultsthatthosepartsoftransmissionsystemsusingmethodstocompressvideosignalsareabletotransmitarealvideosignalwithahighinformationcontentinthecorrectway.Methodstocompressvideosignalscanusetechniquesreducingvideosignalswithoutanylossofinformation(socalled"redundantreduction")orwithsomelossofinformation(socalled"irrelevancereduction").
【中国标准分类号】:A91
【国际标准分类号】:13_310;33_160_40
【页数】:38P.;A4
【正文语种】:英语