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外文翻译--DSP的发展、现况及其应用.doc外文翻译--DSP的发展、现况及其应用.doc -- 5 元

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DSPDevelopment,theStatusandItsApplicationDigitalsignalprocessingDSPisinvolvesmanydisciplinesandwidelyappliesinthemanydomainemergingdisciplines.DSPhastwokindsofmeaningsdigitalSignalProcessing,DigitalSignalProcessor.WeoftensaythatwhatDSPreferstothedigitalsignalprocessor.TheDigitalSignalProcessorsaresuitablefortocompletedigitalsignalprocessingoperationoftheprocessor.Sincethe1960s,withthecomputerandtheinformationtechnologysswiftdevelopment,,thedigitalsignalprocessingtechnologieshasarisenatthehistoricmomentandobtainstherapiddevelopment.Inthepastmorethean20years,thedigitalsignalprocessinghaswidelyappliedinthefieldofcommuniationandothers.Thedigitalsignalprocessingusesthecomputerorthespecialpurposehandlingequipment,carriesomprocessingandsoonfathering,transformation,filter,estimating,value,enhancement,compression,recognitionbythedigitalform,tolbtianthesignalformwhichthepiopleneed.Thedigitalsignalprocessingtskesthenemerousdisciplinesastheretionale,whosescopeisextremelyapplied.Forexample,inmathematicsdomain,thecalculus,theprobabilitystatistics,thestochasticprocess,thenumericalanalysisandsoon.Theyarethedigitalsignalprocessingbasictoolandtheyarerelateto,thesignalandthesystem,thecybernetics,thecorrespondencetheory,thefailurediagnosisandsoon.Recentlytheemergingsomedisciplines,liketheartificialintelligence,thepatternrecognition,theneuralnetworksandsoon,areinseparablewiththedigitalsignalprocessing.Itcanbesaidthatdigitalsignalprocessingtakesmanyclassicssysteminfosowmrationale,simultaneouslycausesitselftobeconeaseric\esifenergingdisciplinestherationale.TheDSPismainlyappliedinthedigitalsignalprocessing,thesimingtocansatisfytherealtimesignalprocessing,thereforeitneedstbedigitalsignalprocessingoperationexecutingquickly,thereforethesehavedecidedtheDSPcharacteristicandthekeytechnologies.ThedigitalsignalprocessingsthekeytechnologiesDSPcontainsmultiplier,accumulator,specialassressproducer,thecollareopensescirculationandsoonrsisestheprocessingspdd\\eedthekeytechnologiesassemblylinetechnology,parallelprocessingtechnology,verylonginstructionword,exceedingtheallowedfigurequantitytechnology,DMAtsakondofCPU.DSPandgeneralCPUarealsodifferent,thebiggestdifferenceliesinCPUisVonNoumastructurewhileDSPtsthedataandtheaddressspaceseparatedHarvardstructure.ThecommercialprogrammablecomponentwhichintheworldisthefirstmonolithicDSPchipmustbetheS2811issuedbyAMICorporation,1979whichyearUSIntelCorporationissued2920isaDSPchipmainmilestone.ThesetwokindsofchipinteriordoesnothavethemonocyclemultiplierwhichthemodernDSPchipmusthave.In1980,JapansNECCorp.launchedμPD7720isthefirstofamultiplierofcommercialDSPchips.Afterthis,themostsuccessfulDSPchipworksasthenumberUSTexasInstrumentsCompanyTIaseriesofproducts.TIcorporrationsucceededin1982promotesitsfirstgenerationofDSPchipTMS3210andserialprlductsTMS32011,TMS320C10/C14/C15/C1617andsoon,afterwardhaspromotedsecondgenerationofDSPoneadteranotherchipTMS32020,TMS320C25/C26/C28,THIRDGENERATIONdspCHIPTMD320C30/C31/C32,fourthgenerationofDSPchipTMS320C40/C44,fifthgenerationofDSPchipTMS320C5X/C54X,secondgenerationofDSPchipadvancedversionTMS320C2XX,collectionpieceofDSPchipsinbodyshignperformanceDPchipTMD320C8XaswellaspresentspeedquickestsixthgenerationofDSPchipTMS320C62X/C67Xandsoon.TIthecommonlyusedDSPchipinductionwillbethreebigseries,namelyTMS320C2000seriesincludingTMS320C2X/2XX,TMS320C5000seriesincludingTMS320C5X/C54X,TMS320C6000seriesTMS320C62X/C67X.Now,TICorporationsaseriesofDSPchipproductalreadbecamenoeintheworldthemostinflut\entialDSPchip.TICorporationalsobecomesthebiggestDSPchipsupplieranditsDSPmarketchareoccupiestheworldsharenearly50.Atpresent,theDSPprocessorbyTI,AGERE,ADIandsoonwasstillseized,theproductiscontrolledtheforeignbigenterarise.AthometheDSPmanufacturearenotmany,butthemainapplicationproductisDVDandtheradiotelephoneandsoon.ThereforethedomesticDSPoutputvalueisnothign.Butintheproductapplication,teimportantDSPapplicationproduct,likethemobilephone,themodem,personalcomputerandthecommunicationdomainapplicationproduct,allusetheinternationalbigplantDSPsolution.TheDSPtechnologyappliescornerofourlife,frommilitarytocivil,theaerospaetotheproductionlife.Intheaerospaceaspect,theDSPtechnologymainlyusedintheradarandsonarsignaldisposal.Inthecorrespondenceaspect,mainlyusedinthemobilephone,VoiceOverIP,ADSLandHFCsignalingInthecontrolaspect,mainlyusedinthemotorcontrol,thelightdrivingwiththeharddiskdriverInthetest/surveyaspect,mainlyusesinthehypothesizedinstrumentmtheautomatedtestsystem,themedicaldiagnosisandsoonIntheelectronicentertainmentaspect,mainlyusedinapplicationshighdefinitiontelevisionHDTV,settopboxesSTB,AC3,familytheater,DVDAlsothedigitalcamera\,thenetworkcameraandsoontoapplytheDSPtechnology.Atthesametime,theSOCchipsystem,willapply,embeddedDSPiswirelesthefutureDSPdevelopmentdirectionandthetendency,ItcanbesaidifthesetheDSPtherewillbefewpeopletobrowseinternetmultimedia,alsowillnothavethewirelesscommunication.Therefore,theDSPwillstillbetheentiresemiconductorindustrytechnicaldrivinginfluence.Now,theDSPapplicationsapplicationdomainexpandsunceasingly,itsletterscreenincludingwidebandinternetturningonservice,nextgenerationwirelesscommunicationsystemsdevelopment,digitalexpenseelectronmarket,automobileelectronmarketdevelopmentandsoonmanyvarious.ThemoderndigitalsignalprocessoriscariesoutthehighspeedfoguresignalprocessingICelectriccircuit,ittoadaptthemultimediainformationizationsecietydemandexactly,growsstrongrapidly,Now,worldappliedineachproductrealmofprlduction,moreoverDSPunceasinglywasstillespandingwiththedomain,thedevelopmentspeedisunusual.Themainapplicationsofitisthedigitizationmobilephone,thedatamodem,thedisk/CDROMcontrollerdemand,thegraphimageryprocessingdemand,theautomobleelectronsystemandsoon.TheusingoftheDSPdomainistoonumeroustociteindividually.IntheTVconferencesystem,alsoappliestheDSPcomponentmassively.IntheseeingandhearingmachinealsoappliestheDSP.Alongwithscienceandtechnologydevelopment,itwillpresentmanytheDSPnewapplicationdomain.TheDSPdevelopmentkitincludeseachkindofsimulationsoftware,thehardwaresimulator,theappraisalboard,thebeginnertotestthesuite,theteachingsuiteandsoon.OverseashassomeDSPConsultantfirmandthewebsite,theyhavetheDSPuserandtheDSPchipsupplier,betweentheDSPthirdpartybidgerole,alsowillprovedethedesignforthecustomer,toprovidethesoftwareaandthehardwareandthepublicationmaterialbooks,somewillalsohavethetrainingclass.AthometherearemanyDSPforums,sothattheusercancarryontheDSPthchnologytotheexchangeinformation.WiththerapidgrowthofChinasDSPmarket,theDSPapplicationinChinahasbeenmaintainingthesametechnologysynchronizationsituationinternationally.Alongwiththechinesesocietydigitization,theinformationizationprogressantinuedwiththechineseeconomytogronstablyhasstimulatedthefastdevelopmentofmarketandthelelctronicinformaioninclustryandpromotedtheDSPwidespreedapplication.DSP的发展、现况及其应用数字信号处理(DigitalSignalProcessing,简称DSP)是一门涉及许多学科而又广泛应用于许多领域的新兴学科。DSP有两种含义digitalSignalProcessing(数字信号处理)、DigitalSignalProcessor(数字信号处理器)。我们常说的DSP指的是数字信号处理器。数字信号处理器是一种适合完成数字信号处理运算的处理器。20世纪60年代以来,随着计算机和信息技术的飞速发展,数字信号处理技术应运而生并得到迅速的发展。在过去的二十多年时间里,数字信号处理已经在通信等领域得到极为广泛的应用。数字信号处理是利用计算机或专用处理设备,以数字形式对信号进行采集、变换、滤波、估值、增强、压缩、识别等处理,以得到符合人们需要的信号形式。数字信号处理是以众多学科为理论基础的,它所涉及的范围极其广泛。例如,在数学领域,微积分、概率统计、随机过程、数值分析等都是数字信号处理的基本工具,与网络理论、信号与系统、控制论、通信理论、故障诊断等也密切相关。近来新兴的一些学科,如人工智能、模式识别、神经网络等,都与数字信号处理密不可分。可以说,数字信号处理是把许多经典的理论体系作为自己的理论基础,同时又使自己成为一系列新兴学科的理论基础。DSP主要应用在数字信号处理中,目的是为了能够满足实时信号处理的要求,因此需要将数字信号处理中的常用运算执行的尽可能快,这就决定了DSP的特点和关键技术。适合数字信号处理的关键技术DSP包含乘法器、累加器、特殊地址发生器、领开销循环等提高处理速度的关键技术流水线技术、并行处理技术、超常指令(VLIW)、超标量技术、DMA等。从广义上讲,DSP、微处理器和微控制器(单片机)等都属于处理器,可以说DSP是一种CPU。DSP和一般的CPU又不同,最大的区别在于CPU是冯.诺伊曼结构的DSP是数据和地址空间分开的哈佛结构。世界上第一个单片DSP芯片应当是1978年AMI公司发布的S2811,1979年美国Intel公司发布的商用可编程器件2920是DSP芯片的一个主要里程碑。这两种芯片内部都没有现代DSP芯片所必须有的单周期乘法器。1980年,日本NEC公司推出的μPD7720是第一个具有乘法器的商用DSP芯片。在这之后,最成功的DSP芯片当数美国德州仪器公司(TexasInstruments,简称TI)的一系列产品。TI公司在1982年成功推出其第一代DSP芯片TMS32010及其系列产品TMS32011、TMS320C10/C14/C15/C16/C17等,之后相继推出了第二代DSP芯片TMS32020、TMS320C25/C26/C28,第三代DSP芯片TMS320C30/C31/C32,第四代DSP芯片TMS320C40/C44,第五代DSP芯片TMS320C5X/C54X,第二代DSP芯片的改进型TMS320C2XX,集多片DSP芯片于一体的高性能DSP芯片TMS320C8X以及目前速度最快的第六代DSP芯片
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