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页数:15页
时间:2019-07-21
《Specifying_Jitter_Performance》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、AudioEngineeringSocietyConventionPaperPresentedatthe117thConvention2004October28–31SanFrancisco,CA,USASpecifyingtheJitterPerformanceofAudioComponents12ChrisTravisandPaulLesso1SonopsisLtd,Wotton-under-Edge,Gloucestershire,UK2、K>2WolfsonMicroelectronicsplc,Edinburgh,UKABSTRACTThequestionofsample-clockqualityisaperennialonefordigitalaudioequipmentdesigners.Yetmostchipmakersprovideverylittleinformationaboutthejitterperformanceoftheirproducts.Conse3、quently,equipmentdesignerssometimesgetburntbyjitterissues.Theincreasinguseofpacket-basedcommunicationsandclass-Damplificationwillthrowthesemattersintosharprelief.Thispaperreviewsvariouswaysofcharacterizingandquantifyingjitter,andrefinesseveralofthemfo4、raudiopurposes.Italsoattemptstopresentacommon,unambiguousterminology.Thefocusincludeswidebandjitter,basebandjitter,jitterspectra,periodjitter,long-termjitterandjittersignatures.Commentsaremadeonjittertransferthroughphase-lockedloopsandonthejittersusce5、ptibilityofaudioconverters.1INTRODUCTIONDetailscanbefoundat.Clockstickattheheartofeverydigitalaudioproduct.TheauthorsalsoinvitefeedbackonthepresentpaperJitteronclocksthatareappliedtoaudioconvertersbydirectemail.(analog-to-digita6、landdigital-to-analog)candegradeaudioperformance.Tomakesenseofthissituation,2OVERVIEWdesignersneedaframeworkforthinkingaboutjitter.Tomakeprogress,theindustryneedssomegoodwaysTheemphasisinthispaperisonaudiosampleclocksofcharacterizingandquantifyingjitt7、erperformance.andontheclockingchainsfromwhichtheyarederived.Italsoneedsacommonterminology.ThispaperaimsItisnotoninterface-specificaspectsofjitter.tocontributeinalloftheseareas.WehavechosentofocusatthisstageoncomponentsAtthetimeofwriting,anewprojecthas8、beenproposed(e.g.chips)ratherthanequipment(e.g.mixingdesks).totheAESStandardsCommitteewiththeshorttitleProgresswiththeformerwillhopefullyspawnprogress'JitterPerformanceSpecification'.Itislikelytobewiththelatterinduecourse.allocatedtoAESSC-02-0
2、K>2WolfsonMicroelectronicsplc,Edinburgh,UKABSTRACTThequestionofsample-clockqualityisaperennialonefordigitalaudioequipmentdesigners.Yetmostchipmakersprovideverylittleinformationaboutthejitterperformanceoftheirproducts.Conse
3、quently,equipmentdesignerssometimesgetburntbyjitterissues.Theincreasinguseofpacket-basedcommunicationsandclass-Damplificationwillthrowthesemattersintosharprelief.Thispaperreviewsvariouswaysofcharacterizingandquantifyingjitter,andrefinesseveralofthemfo
4、raudiopurposes.Italsoattemptstopresentacommon,unambiguousterminology.Thefocusincludeswidebandjitter,basebandjitter,jitterspectra,periodjitter,long-termjitterandjittersignatures.Commentsaremadeonjittertransferthroughphase-lockedloopsandonthejittersusce
5、ptibilityofaudioconverters.1INTRODUCTIONDetailscanbefoundat.Clockstickattheheartofeverydigitalaudioproduct.TheauthorsalsoinvitefeedbackonthepresentpaperJitteronclocksthatareappliedtoaudioconvertersbydirectemail.(analog-to-digita
6、landdigital-to-analog)candegradeaudioperformance.Tomakesenseofthissituation,2OVERVIEWdesignersneedaframeworkforthinkingaboutjitter.Tomakeprogress,theindustryneedssomegoodwaysTheemphasisinthispaperisonaudiosampleclocksofcharacterizingandquantifyingjitt
7、erperformance.andontheclockingchainsfromwhichtheyarederived.Italsoneedsacommonterminology.ThispaperaimsItisnotoninterface-specificaspectsofjitter.tocontributeinalloftheseareas.WehavechosentofocusatthisstageoncomponentsAtthetimeofwriting,anewprojecthas
8、beenproposed(e.g.chips)ratherthanequipment(e.g.mixingdesks).totheAESStandardsCommitteewiththeshorttitleProgresswiththeformerwillhopefullyspawnprogress'JitterPerformanceSpecification'.Itislikelytobewiththelatterinduecourse.allocatedtoAESSC-02-0
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