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类型广东海洋大学电子信息工程专业英语(数字信号处理)课件.ppt(纯ppt,可能不含音视频素材文件)

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    广东 海洋大学 电子信息工程 专业 英语 数字信号 处理 课件
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    1、Specific English for Electronic Information EngineeringTeacher:张培珍:张培珍Guangdong Ocean UniversityLesson 9:Digital signal processingIndexPre-reading9.1 Signal processing9.2 Digital signal processing9.3 The development of Digital Signal processing9.4 Digital signal processorPre-reading123 what is signa

    2、l processing?what is digital signal processors?What is digital signal processing?Read the lesson,paying attention to the following questions.Remind the Words and expressionsGloriousEvidentAcousticsSeismographyDomainExtractDesirableInterpolationAlgorithmNaturalTendencySophisticatedLogarithmFurtherRes

    3、trictedsuitableRemind the Words and expressionsCurriculumTechniqueCodeProgrammableIncorporateFetchMultiplyExecutionBio-engineeringFourier transformFast Fourier transform(FFT)9.1 Signal processing(1)Signal processing is evident in different domains,such as bio-engineering medicine,acoustics,radar,sei

    4、smography,pronunciation correspondence,digital communication,nuclear science as well as other domains;9.1 Signal processing(2)Extract characteristic parameter in ECG(electrocardiogram)analysis or in speech transmission and speech recognition;(3)Remove interference and noise;(4)Turns signal for easie

    5、r to interpret;Words and expressionsSignal processingGloriousBio-engineering medicineAcousticsRadarSeismographyPronunciation-correspondence信号处理信号处理光荣的,显赫的光荣的,显赫的生物工程医学生物工程医学声学声学雷达雷达地震学地震学语音通信语音通信Words and expressionsDigital communicationNuclear scienceSituationECG analysisSpeech transmissionSpeech r

    6、ecognitionExtractCharacteristic parameter数字通信数字通信核科学核科学条件,环境条件,环境心电图分析心电图分析语音传输语音传输语音识别语音识别提取提取特征参数特征参数Words and expressionsInterferencenoiseSpecialistInterpret干扰干扰噪声噪声专家专家解释解释,说明,说明9.2 Digital signal processing(1)Is concerned with representation of the signal sequence,expressing and processing the

    7、signal sequence;(2)Estimates the signal characteristic parameter;(3)Transform the signal into a desirable form.Digital signal processing algorithms(1)Numerical analysis formula(2)Interpolation,integration,differentiation;Signal processing algorithmsignal processing algorithm as following figure:Word

    8、s and expressionsRepresentationSignal sequenceEstimateCharacteristic parameterClassicalNumerical analysisFormulaInterpolationIntegration代表,表示代表,表示信号序列信号序列估计估计特征参数特征参数经典的经典的数值分析数值分析公式公式插值插值积分积分Words and expressionsDifferentiationAlgorithmPromoteIngeniousSimultaneousIntegrated circuit craftEconomicalI

    9、mplementation差分差分算法算法促进,推动促进,推动巧妙的,设计独特的巧妙的,设计独特的同时的同时的集成电路工艺集成电路工艺经济的,节约的经济的,节约的完成,完成,实现实现Fourier transform and FFT(1)A tendency to experiment with sophisticated signal processing algorithms.(2)Requires the explicit evaluation of inverse Fourier transform of logarithms of the Fourier transform of t

    10、he input.0204060801000102030405060020406080100-40-2002040Logarithm of FTFTWords and expressionsNaturalTendencyIncreasinglySophisticatedAlgorithmExplicitEvaluationInverse Fourier transformlogarithm自然的自然的趋势趋势增加的增加的诡辩的,复杂的精致的诡辩的,复杂的精致的算法算法明确的,清楚的明确的,清楚的评价评价傅里傅里叶反变换叶反变换对数对数Fourier transform and FFT(1)In

    11、 1965,an efficient algorithm for Fourier transform is disclosed.(2)FFT reduced the computation time by orders of magnitude.Fourier transform and FFT Image and its Fourier spectrumWords and expressionsEvolutionAcceleratedDisclosureEfficient algorithmOrders of magnitudePermitted SophisticatedInteracti

    12、on with进化进化加速的加速的公开的公开的有效的算法有效的算法几个数量级几个数量级允许的允许的复杂的复杂的交互交互Implication of FFT(1)Tied to discrete-time concept.(2)Stimulating a reformulation of signal processing concepts and algorithm.02040608010000.20.40.60.81Words and expressionsImplicationInherentlyDiscrete-timeConceptStimulateReformulationMathe

    13、maticsDiscrete-time domain含义,含意含义,含意固有的,天性的固有的,天性的离散时间离散时间概念概念鼓舞,刺激鼓舞,刺激再形成再形成数学的数学的离散时间域离散时间域Development(1)Dated from 1960s.(2)Not widely used at that time,was available in universities and scientific research institutions.Words and expressionsDated fromUtilizeMainframeAvailableUniversityScientific

    14、 research institution追溯至追溯至利用利用主机主机适用于适用于大学大学研究所研究所Application(1)In the 1980s and the 90s,provide bigger development space to DSP.(2)Quickly entered the commercial marketplace.(3)Arrived at peoples ordinary life.Words and expressionsExpensiveRestrictedMilitaryGovernmentCommercial marketplaceMobile t

    15、elephoneCompact disc playerElectronic voice mail昂贵的昂贵的受限受限的的军事军事政府政府商业市场商业市场移动电话移动电话影碟机影碟机电子语音信箱电子语音信箱Curriculum(1)1980s,was specialized graduate curriculum in the electronic engineering.(2)1990s,became a part of undergraduate curriculum.(3)Today,becomes a necessary skill by multi-domain scientists

    16、and engineers.Words and expressionsSpecializedGraduate studentUndergraduateCurriculumMulti-domainRevolutionized专业的专业的研究生研究生本科生本科生课程课程多领域的多领域的引起革命的引起革命的Digital signal processor DSP(1)Introduced in the late 1970s and early 1980s;(2)DSP is programmable device;(3)Has its own native instruction code;(4)c

    17、an carry out millions of floating point operations per second;Digital signal processor DSPWords and expressionsIntroductionManufacturers Specialize MicroprocessorArchitectureProgrammableNative instructionFloating point-operation引言,引进引言,引进制造商制造商专用微处理器专用微处理器结构结构可编程的可编程的内部指令内部指令浮点运算浮点运算Characteristic o

    18、f DSP(1)real-time operation;(2)high through-put rate;(3)Intensive arithmetic operation;(4)Notably multiplication and addition or multiply-accumulate;Words and expressionsReal-time operationEmphasisThrough-put rateIntensive arithmetic-OperationMultiplicationAdditionMultiply-accumulatetailored实时运算实时运算

    19、强调强调吞吐率吞吐率高强度的数学运算高强度的数学运算乘法乘法加法加法乘累加乘累加调整适应,特制的调整适应,特制的Feature of DSP chip(1)Allows fast multiplication;(2)Separate bused or memories form program and data;(3)Well known Harvard architecture;(4)cycle-saving instructions for branching or looping;(5)Very fast speed(a cycle 100ns);(6)Use of pipelining

    20、 to reduce instruction time and increases speed;Words and expressionsBuild-inMultiplicationChipsIncorporateSingle-cycleInstructionIn parallel内置内置乘法乘法芯片芯片包含,组合,包含,组合,单周期单周期指令指令并行并行Words and expressionsBusMemoryHarvard architectureOverlapFetch and execution总线总线存储器存储器哈佛结构哈佛结构重叠重叠取址和执行取址和执行Words and exp

    21、ressionsCycle-saving instructionBranching LoopingAccumulating Delaypipelining周期保存指令周期保存指令分支分支循环循环累加累加延迟延迟流水线流水线Conclusion(1)digital signal processing is one of the most powerful technologies;(2)Rewrite the history of science and engineering;(3)Can improve signal quality;(4)Can collect,process,transmit,display and store informationWords and expressionsPowerfulRevolutionaryFiltering signalExtract informationCollectProcessTransmitDisplay有力有力的的创新创新的,革命性的的,革命性的滤波信号滤波信号提取信息提取信息收集收集处理处理传输传输显示显示广东海洋大学广东海洋大学

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