廣東海洋大學(xué)電子信息工程專業(yè)英語(數(shù)字信號處理)課件

SpecificEnglishforElectronicInformationEngineeringTeacher：張培珍GuangdongOceanUniversityLesson9:DigitalsignalprocessingIndexPre-reading9.1Signalprocessing9.2Digitalsignalprocessing9.3ThedevelopmentofDigitalSignalprocessing9.4DigitalsignalprocessorPre-reading123whatissignalprocessing?whatisdigitalsignalprocessors?Whatisdigitalsignalprocessing?Readthelesson,payingattentiontothefollowingquestions.RemindtheWordsandexpressionsGloriousEvidentAcousticsSeismographyDomainExtractDesirableInterpolationAlgorithmNaturalTendencySophisticatedLogarithmFurtherRestrictedsuitableRemindtheWordsandexpressionsCurriculumTechniqueCodeProgrammableIncorporateFetchMultiplyExecutionBio-engineeringFouriertransformFastFouriertransform(FFT)9.1Signalprocessing(1)Signalprocessingisevidentindifferentdomains,suchasbio-engineeringmedicine,acoustics,radar,seismography,pronunciationcorrespondence,digitalcommunication,nuclearscienceaswellasotherdomains;9.1Signalprocessing(2)ExtractcharacteristicparameterinECG(electrocardiogram)analysisorinspeechtransmissionandspeechrecognition;(3)Removeinterferenceandnoise;(4)Turnssignalforeasiertointerpret;WordsandexpressionsSignalprocessingGloriousBio-engineeringmedicineAcousticsRadarSeismographyPronunciation-correspondence信號處理光榮的，顯赫的生物工程醫(yī)學(xué)聲學(xué)雷達地震學(xué)語音通信WordsandexpressionsDigitalcommunicationNuclearscienceSituationECGanalysisSpeechtransmissionSpeechrecognitionExtractCharacteristicparameter數(shù)字通信核科學(xué)條件，環(huán)境心電圖分析語音傳輸語音識別提取特征參數(shù)WordsandexpressionsInterferencenoiseSpecialistInterpret干擾噪聲專家解釋，說明9.2DigitalsignalprocessingIsconcernedwithrepresentationofthesignalsequence,expressingandprocessingthesignalsequence;Estimatesthesignalcharacteristicparameter;Transformthesignalintoadesirableform.DigitalsignalprocessingalgorithmsNumericalanalysisformulaInterpolation,integration,differentiation;Signalprocessingalgorithmsignalprocessingalgorithmasfollowingfigure:WordsandexpressionsRepresentationSignalsequenceEstimateCharacteristicparameterClassicalNumericalanalysisFormulaInterpolationIntegration代表，表示信號序列估計特征參數(shù)經(jīng)典的數(shù)值分析公式插值積分WordsandexpressionsDifferentiationAlgorithmPromoteIngeniousSimultaneousIntegratedcircuitcraftEconomicalImplementation差分算法促進，推動巧妙的，設(shè)計獨特的同時的集成電路工藝經(jīng)濟的，節(jié)約的完成，實現(xiàn)FouriertransformandFFTAtendencytoexperimentwithsophisticatedsignalprocessingalgorithms.RequirestheexplicitevaluationofinverseFouriertransformoflogarithmsoftheFouriertransformoftheinput.LogarithmofFTFTWordsandexpressionsNaturalTendencyIncreasinglySophisticatedAlgorithmExplicitEvaluationInverseFouriertransformlogarithm自然的趨勢增加的詭辯的，復(fù)雜的精致的算法明確的，清楚的評價傅里葉反變換對數(shù)FouriertransformandFFTIn1965,anefficientalgorithmforFouriertransformisdisclosed.FFTreducedthecomputationtimebyordersofmagnitude.FouriertransformandFFTImageanditsFourierspectrumWordsandexpressionsEvolutionAcceleratedDisclosureEfficientalgorithmOrdersofmagnitudePermittedSophisticatedInteractionwith進化加速的公開的有效的算法幾個數(shù)量級允許的復(fù)雜的交互ImplicationofFFTTiedtodiscrete-timeconcept.Stimulatingareformulationofsignalprocessingconceptsandalgorithm.WordsandexpressionsImplicationInherentlyDiscrete-timeConceptStimulateReformulationMathematicsDiscrete-timedomain含義，含意固有的，天性的離散時間概念鼓舞，刺激再形成數(shù)學(xué)的離散時間域DevelopmentDatedfrom1960s.Not

widelyusedatthattime,wasavailableinuniversitiesandscientificresearchinstitutions.WordsandexpressionsDatedfromUtilizeMainframeAvailableUniversityScientificresearchinstitution追溯至利用主機適用于大學(xué)研究所ApplicationInthe1980sandthe90s,providebiggerdevelopmentspacetoDSP.Quicklyenteredthecommercialmarketplace.Arrivedatpeople’sordinarylife.WordsandexpressionsExpensiveRestrictedMilitaryGovernmentCommercialmarketplaceMobiletelephoneCompactdiscplayerElectronicvoicemail昂貴的受限的軍事政府商業(yè)市場移動電話影碟機電子語音信箱Curriculum1980s,wasspecializedgraduatecurriculumintheelectronicengineering.1990s,becameapartofundergraduatecurriculum.Today,becomesanecessaryskillbymulti-domainscientistsandengineers.WordsandexpressionsSpecializedGraduatestudentUndergraduateCurriculumMulti-domainRevolutionized專業(yè)的研究生本科生課程多領(lǐng)域的引起革命的DigitalsignalprocessorDSPIntroducedinthelate1970sandearly1980s;DSPisprogrammabledevice;Hasitsownnativeinstructioncode;cancarryoutmillionsoffloatingpointoperationspersecond;DigitalsignalprocessorDSPWordsandexpressionsIntroductionManufacturersSpecialize–MicroprocessorArchitectureProgrammableNativeinstructionFloatingpoint-operation引言，引進制造商專用微處理器結(jié)構(gòu)可編程的內(nèi)部指令浮點運算CharacteristicofDSPreal-timeoperation;highthrough-putrate;Intensivearithmeticoperation;Notablymultiplicationandadditionormultiply-accumulate;WordsandexpressionsReal-timeoperationEmphasisThrough-putrateIntensivearithmetic-OperationMultiplicationAdditionMultiply-accumulatetailored實時運算強調(diào)吞吐率高強度的數(shù)學(xué)運算乘法加法乘累加調(diào)整適應(yīng)，特制的FeatureofDSPchipAllowsfastmultiplication；Separatebusedormemoriesformprogramanddata;WellknownHarvardarchitecture;cycle-savinginstructionsforbranchingorlooping;Veryfastspeed(acycle100ns);Useofpipeliningtoreduceinstructiontimeandincreasesspeed;WordsandexpressionsBuild-inMultiplicationChipsIncorporateSingle-cycleInstructionInparallel內(nèi)置乘法芯片包含，組合，單周