BS EN ISO/IEC 13818-9-2001 信息技术.移动画面和相关音频信息通用编码.第9部分:系统译码器实时接口扩展
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【英文标准名称】:Informationtechnology-Genericcodingofmovingpicturesandassociatedaudioinformation-Extensionforrealtimeinterfaceforsystemsdecoders
【原文标准名称】:信息技术.移动画面和相关音频信息通用编码.第9部分:系统译码器实时接口扩展
【标准号】:BSENISO/IEC13818-9-2001
【标准状态】:作废
【国别】:英国
【发布日期】:2001-05-15
【实施或试行日期】:2001-05-15
【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】:数据处理;接口;信息交流;视频信号;情报系统;译码;声信号;录音;实时系统;编码(数据转换);电影摄影;数字记录法;视频记录
【英文主题词】:Audiosignals;Clay;Codification;Coding(dataconversion);Computergraphics;Dataconversion;Decoders;Encoding;Imageprocessing;Informationtechnology;Interfaces(dataprocessing);Multimedia;PCM;Real-time;Videorecording;Videosignals
【摘要】:ThispartofISO/IEC13818doesnotchangeorsupersedeanyoftherequirementsinISO/IEC13818-1.AllTransportStreams,whetherornottheyaredeliveredinaccordancewiththeRTIshallcomplywithISO/IEC13818-1.Inparticular,theaccuracyrequirementinISO/IEC13818-1forPCRsinTransportStreamsisnotchangedbytherequirementsofthispartofISO/IEC13818.CompliancewiththispartofISO/IEC13818isnotrequiredforcompliancewithISO/IEC13818-1.ThispartofISO/IEC13818doesnotaddressdecoderrequirementsrelatedtoclockacquisitionandslewrateconstraints.Forexample,supposeasystemutilizesthe27MHzsystemclocktoderiveanITU-RPALchromaclockof4.434MHz,witha0.1Hz/secslewratelimitation.Withasourceclockof0.1ppmaccuracy,adecoderclockof30ppmaccuracy,andstraightforwardphase-lockedloopclockrecoverycircuitry,adecodercouldrequireabout305,000bitstopreventbufferunder/overflowduringfrequencyacquisition,evenwithlow-jitterdelivery.Theactualnumberofbitsadecoderrequiresforthispurposecouldbehigherorlower,dependingontheimplementation.Figure1providesasimplifiedviewofthescopeofthispartofISO/IEC13818.ThisfigureshowsaDataLinkInterfaceAdaptor,aReal-TimeInterfaceDecoder(RTD),andthelocationoftheTransportStreamwhichcomplieswiththeRTISpecification.ItshouldbenotedthattheDataLinkInterfaceAdaptorisresponsibleforremovinganydatalinkprotocolordatastructures,aswellasanytimingvariations(i.e.jitter)inordertoproduceacompliantRTITransportStream.
【中国标准分类号】:L71
【国际标准分类号】:33_160_60;35_040
【页数】:14P.;A4
【正文语种】:英语
【原文标准名称】:信息技术.移动画面和相关音频信息通用编码.第9部分:系统译码器实时接口扩展
【标准号】:BSENISO/IEC13818-9-2001
【标准状态】:作废
【国别】:英国
【发布日期】:2001-05-15
【实施或试行日期】:2001-05-15
【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】:数据处理;接口;信息交流;视频信号;情报系统;译码;声信号;录音;实时系统;编码(数据转换);电影摄影;数字记录法;视频记录
【英文主题词】:Audiosignals;Clay;Codification;Coding(dataconversion);Computergraphics;Dataconversion;Decoders;Encoding;Imageprocessing;Informationtechnology;Interfaces(dataprocessing);Multimedia;PCM;Real-time;Videorecording;Videosignals
【摘要】:ThispartofISO/IEC13818doesnotchangeorsupersedeanyoftherequirementsinISO/IEC13818-1.AllTransportStreams,whetherornottheyaredeliveredinaccordancewiththeRTIshallcomplywithISO/IEC13818-1.Inparticular,theaccuracyrequirementinISO/IEC13818-1forPCRsinTransportStreamsisnotchangedbytherequirementsofthispartofISO/IEC13818.CompliancewiththispartofISO/IEC13818isnotrequiredforcompliancewithISO/IEC13818-1.ThispartofISO/IEC13818doesnotaddressdecoderrequirementsrelatedtoclockacquisitionandslewrateconstraints.Forexample,supposeasystemutilizesthe27MHzsystemclocktoderiveanITU-RPALchromaclockof4.434MHz,witha0.1Hz/secslewratelimitation.Withasourceclockof0.1ppmaccuracy,adecoderclockof30ppmaccuracy,andstraightforwardphase-lockedloopclockrecoverycircuitry,adecodercouldrequireabout305,000bitstopreventbufferunder/overflowduringfrequencyacquisition,evenwithlow-jitterdelivery.Theactualnumberofbitsadecoderrequiresforthispurposecouldbehigherorlower,dependingontheimplementation.Figure1providesasimplifiedviewofthescopeofthispartofISO/IEC13818.ThisfigureshowsaDataLinkInterfaceAdaptor,aReal-TimeInterfaceDecoder(RTD),andthelocationoftheTransportStreamwhichcomplieswiththeRTISpecification.ItshouldbenotedthattheDataLinkInterfaceAdaptorisresponsibleforremovinganydatalinkprotocolordatastructures,aswellasanytimingvariations(i.e.jitter)inordertoproduceacompliantRTITransportStream.
【中国标准分类号】:L71
【国际标准分类号】:33_160_60;35_040
【页数】:14P.;A4
【正文语种】:英语
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