广东海洋大学电子信息工程专业英语(数字信号处理)课件

SpecificEnglishforElectronicInformationEngineeringTeacher：张培珍GuangdongOceanUniversitySpecificEnglishforElectroniLesson9:DigitalsignalprocessingIndexPre-reading9.1Signalprocessing9.2Digitalsignalprocessing9.3ThedevelopmentofDigitalSignalprocessing9.4DigitalsignalprocessorLesson9:DigitalsignalprocePre-reading123whatissignalprocessing?whatisdigitalsignalprocessors?Whatisdigitalsignalprocessing?Readthelesson,payingattentiontothefollowingquestions.Pre-reading123whatissignalRemindtheWordsandexpressionsGloriousEvidentAcousticsSeismographyDomainExtractDesirableInterpolationAlgorithmNaturalTendencySophisticatedLogarithmFurtherRestrictedsuitableRemindtheWordsandexpressioRemindtheWordsandexpressionsCurriculumTechniqueCodeProgrammableIncorporateFetchMultiplyExecutionBio-engineeringFouriertransformFastFouriertransform(FFT)RemindtheWordsandexpressio9.1Signalprocessing(1)Signalprocessingisevidentindifferentdomains,suchasbio-engineeringmedicine,acoustics,radar,seismography,pronunciationcorrespondence,digitalcommunication,nuclearscienceaswellasotherdomains;9.1Signalprocessing(1)Signal9.1Signalprocessing(2)ExtractcharacteristicparameterinECG(electrocardiogram)analysisorinspeechtransmissionandspeechrecognition;(3)Removeinterferenceandnoise;(4)Turnssignalforeasiertointerpret;9.1Signalprocessing(2)ExtraWordsandexpressionsSignalprocessingGloriousBio-engineeringmedicineAcousticsRadarSeismographyPronunciation-correspondence信号处理光荣的，显赫的生物工程医学声学雷达地震学语音通信WordsandexpressionsSignalprWordsandexpressionsDigitalcommunicationNuclearscienceSituationECGanalysisSpeechtransmissionSpeechrecognitionExtractCharacteristicparameter数字通信核科学条件，环境心电图分析语音传输语音识别提取特征参数WordsandexpressionsDigitalcWordsandexpressionsInterferencenoiseSpecialistInterpret干扰噪声专家解释，说明WordsandexpressionsInterfere9.2DigitalsignalprocessingIsconcernedwithrepresentationofthesignalsequence,expressingandprocessingthesignalsequence;Estimatesthesignalcharacteristicparameter;Transformthesignalintoadesirableform.9.2DigitalsignalprocessingIDigitalsignalprocessingalgorithmsNumericalanalysisformulaInterpolation,integration,differentiation;DigitalsignalprocessingalgoSignalprocessingalgorithmsignalprocessingalgorithmasfollowingfigure:SignalprocessingalgorithmsigWordsandexpressionsRepresentationSignalsequenceEstimateCharacteristicparameterClassicalNumericalanalysisFormulaInterpolationIntegration代表，表示信号序列估计特征参数经典的数值分析公式插值积分WordsandexpressionsRepresentWordsandexpressionsDifferentiationAlgorithmPromoteIngeniousSimultaneousIntegratedcircuitcraftEconomicalImplementation差分算法促进，推动巧妙的，设计独特的同时的集成电路工艺经济的，节约的完成，实现WordsandexpressionsDifferentFouriertransformandFFTAtendencytoexperimentwithsophisticatedsignalprocessingalgorithms.RequirestheexplicitevaluationofinverseFouriertransformoflogarithmsoftheFouriertransformoftheinput.LogarithmofFTFTFouriertransformandFFTAtenWordsandexpressionsNaturalTendencyIncreasinglySophisticatedAlgorithmExplicitEvaluationInverseFouriertransformlogarithm自然的趋势增加的诡辩的，复杂的精致的算法明确的，清楚的评价傅里叶反变换对数WordsandexpressionsNatural自然FouriertransformandFFTIn1965,anefficientalgorithmforFouriertransformisdisclosed.FFTreducedthecomputationtimebyordersofmagnitude.FouriertransformandFFTIn19FouriertransformandFFTImageanditsFourierspectrumFouriertransformandFFTImageWordsandexpressionsEvolutionAcceleratedDisclosureEfficientalgorithmOrdersofmagnitudePermittedSophisticatedInteractionwith进化加速的公开的有效的算法几个数量级允许的复杂的交互WordsandexpressionsEvolutionImplicationofFFTTiedtodiscrete-timeconcept.Stimulatingareformulationofsignalprocessingconceptsandalgorithm.ImplicationofFFTTiedtodiscWordsandexpressionsImplicationInherentlyDiscrete-timeConceptStimulateReformulationMathematicsDiscrete-timedomain含义，含意固有的，天性的离散时间概念鼓舞，刺激再形成数学的离散时间域WordsandexpressionsImplicatiDevelopmentDatedfrom1960s.Not

widelyusedatthattime,wasavailableinuniversitiesandscientificresearchinstitutions.DevelopmentDatedfrom1960s.WordsandexpressionsDatedfromUtilizeMainframeAvailableUniversityScientificresearchinstitution追溯至利用主机适用于大学研究所WordsandexpressionsDatedfroApplicationInthe1980sandthe90s,providebiggerdevelopmentspacetoDSP.Quicklyenteredthecommercialmarketplace.Arrivedatpeople’sordinarylife.ApplicationInthe1980sandthWordsandexpressionsExpensiveRestrictedMilitaryGovernmentCommercialmarketplaceMobiletelephoneCompactdiscplayerElectronicvoicemail昂贵的受限的军事政府商业市场移动电话影碟机电子语音信箱WordsandexpressionsExpensiveCurriculum1980s,wasspecializedgraduatecurriculumintheelectronicengineering.1990s,becameapartofundergraduatecurriculum.Today,becomesanecessaryskillbymulti-domainscientistsandengineers.Curriculum1980s,wasspecialWordsandexpressionsSpecializedGraduatestudentUndergraduateCurriculumMulti-domainRevolutionized专业的研究生本科生课程多领域的引起革命的WordsandexpressionsSpecializDigitalsignalprocessorDSPIntroducedinthelate1970sandearly1980s;DSPisprogrammabledevice;Hasitsownnativeinstructioncode;cancarryoutmillionsoffloatingpointoperationspersecond;DigitalsignalprocessorDSPIDigitalsignalprocessorDSPDigitalsignalprocessorDSPWordsandexpressionsIntroductionManufacturersSpecialize–MicroprocessorArchitectureProgrammableNativeinstructionFloatingpoint-operation引言，引进制造商专用微处理器结构可编程的内部指令浮点运算WordsandexpressionsIntroductCharacteristicofDSPreal-timeoperation;highthrough-putrate;Intensivearithmeticoperation;Notablymultiplicationandadditionormultiply-accumulate;CharacteristicofDSPreal-timWordsandexpressionsReal-timeoperationEmphasisThrough-putrateIntensivearithmetic-OperationMultiplicationAdditionMultiply-accumulatetailored实时运算强调吞吐率高强度的数学运算乘法加法乘累加调整适应，特制的WordsandexpressionsReal-timeFeatureofDSPchipAllowsfastmultiplication；Separatebusedormemoriesformprogramanddata;WellknownHarvardarchitecture;cycle-savinginstructionsforbranchingorlooping;Veryfastspeed(acycle100ns);Useofpipeliningtoreduceinstructiontimeandincreasesspeed;FeatureofDSPchipAllowsfaWordsandexpressionsBuild-inMultiplicationChipsIncorporateSingle-cycleInstructionInparallel内置乘法芯片包含，组合，单周期指令并行WordsandexpressionsBuild-in内Wordsandexpressio