电子信息工程专业英语.ppt

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1、电子信息工程专业英语课件现在学习的是第1页，共24页A Feature Extraction Method Based on Gauss Wavelet Filter in Speech RecognitionAbstract:This paper uses wavelet theory in noise robust feature extraction of speech recognition and introduces a feature extraction method based on Gauss wavelet filter.The Gauss wavelet filter

2、with human critical frequency band is obtained by studying human auditory characteristics.This paper also studies the method of scale parameter choosing in designing Gauss wavelet filter.The methods with new and original feature are simulated.The RBF neural net was used in train and recognition cour

3、se.The results show that new feature has higher recognition rate and better robustness than traditional feature.Key words:feature extraction;Gauss wavelet;speech recognition现在学习的是第2页，共24页2、基于独立分量分析的单通道语音增强算法摘要：传统的独立分量分析要求观测信号的个数不能小于源信号的个数，无法直接对单路信号进行独立分量分析。为了能够利用独立分量分析分离加性噪声，须构造一路观测信号。基于语音信号的短时平稳的特性

4、，该文提出一种构造噪声信号的算法，实现了信号与噪声的分离。仿真结果表明，利用该算法可得到很好的消噪结果，提高信号的信噪比。关键词：独立分量分析；盲源分离；语音增强；单通道现在学习的是第3页，共24页10/7/20223Single Channel Speech Enhancement Algorithm Based on Independent Component AnalysisAbstract:The standard independent component analysis algorithm require that the number of sensors is more th

5、an or equal to that of sources,so it is impossible to apply independent component analysis to a single channel signal directly.This paper proposes an algorithm for constructing a noise signal for noise reduction based on ICA,thereby noise and signal can be separated through ICA.Simulation result sho

6、ws that much better de-noise effect and signal-noise ratio can be obtained by using this algorithm.Key words:Independent Component Analysis(ICA);blind sources separation;speech enhancement;single channel现在学习的是第4页，共24页Unit 5 Modern Digital DesignLesson 13 Overview of Modern Digital Design现在学习的是第5页，共2

7、4页Lesson 13 Overview of Modern Digital DesignBackgroundsText tour 现在学习的是第6页，共24页Terminology CD:compact disc光盘LP:long playing record慢转密纹唱片CAD:Computer Aided Design计算机辅助设计 EDA:Electronic Design Automatic电子设计自动化Backgrounds现在学习的是第7页，共24页Terminology HDL:Hardware Description Language硬件描述语言VHDL极高速集成电路(VHSI

8、C)硬件描述语言Backgrounds现在学习的是第8页，共24页Terminology ASIC:Application Specific Integrated Circuit专用集成电路PLD:Programmable Logic Device可编程逻辑器件PLA:Programmable Logic Array可编程逻辑阵列RTL:Register Transfer Level寄存器传送级 Backgrounds现在学习的是第9页，共24页Capture in dictionaryTo take captive,as by force or craft;seize.俘虏；捕获To gai

9、n possession or control of,as in a game or contest:赢得，夺取To attract and hold:吸引tales of adventure that capture the imagination.To succeed in preserving in lasting form:长久保存capture a likeness in a painting.保存一幅油画中的人物肖像现在学习的是第10页，共24页Capture in dictionaryThe phenomenon in which an atom or a nucleus abs

10、orbs a subatomic particle,often with the subsequent emission of radiation.俘获现在学习的是第11页，共24页Capture in textSynthesis and simulation EDA tools require that the design be transferred from the designers imagination into the tools themselves.This can be done by drawing a diagram of the design using a gra

11、phical package.This is known as schematic capture.EDA综合工具和模拟工具均要求设计者将想法转化为设计。使用图形化软件包画设计原理图可以实现这一步。这种方法称之为“原理图输入”。现在学习的是第12页，共24页Capture in use hole capture空穴俘获orbital electron capture轨道电子俘获signal capture信号俘获现在学习的是第13页，共24页Effective in dictionaryHaving an intended or expected effect.有效的Producing a s

12、trong impression or response;striking 深刻印象的gave an effective performance as Othello.Operative;in effect 有效的；生效的The law is effective immediately.Existing in fact;actual 实在的，实际的a decline in the effective demand.Prepared for use or action,especially in warfare.有战斗力的，备战的现在学习的是第14页，共24页Effective in textA

13、lthough the individual integrated circuits might cost as little as 10 cents each,the cost of designing the printed circuit board for such a system and the cost of assembling the board are very significant and this design style is no longer cost-effective.尽管每片集成电路的成本也许只有10美分，但用于印刷电路板（PCB）设计、组装的成本却非常可

14、观。因此，这种设计方法并不合算的。现在学习的是第15页，共24页effective range 有效距离,有效射程effective resistance 有效电阻effective measures 有效措施effective forces 战斗兵力Effective in use 现在学习的是第16页，共24页Sequential in dictionaryForming or characterized by a sequence,as of musical notes;Pertaining to the occurrence of events in time sequence,wit

15、h no simultaneity or overlap of events.顺序的Sequent.随之而来的现在学习的是第17页，共24页Sequential in textMost digital systems are sequential,that is they have states,and the outputs depend on the present state.大多数数字系统是时序的系统中有许多状态，而输出依赖于当前的状态（现态）。现在学习的是第18页，共24页Specification in dictionaryThe act of specifying.详细说明A d

16、etailed,exact statement of particulars,especially a statement prescribing materials,dimensions,and quality of work for something to be built,installed,or manufactured;In system development,a description of how the design of a system,device,or program is to be implemented.规格A single item or article t

17、hat has been specified.已经指明的事项或条款现在学习的是第19页，共24页Specification in text Write a specification.If necessary,partition the design into smaller parts and write a specification for each part.From the specification draw a state machine chart.This shows each state of the system and the input conditions that

18、 cause a change of state,together with the outputs in each state.写出设计规格。如果需要的话，将设计分解为若干部分，并为每一部分写出设计规格。根据设计规格，画出状态机（状态转换图）。该图包括系统的每一个状态、引起状态变化的输入条件和每个状态的输出。现在学习的是第20页，共24页Specification in use cable specification 电缆规格contract specifications 合同条款design specification 设计说明electrical specification 电气规范en

19、gine specification 发动机说明书environmental specification 环境要求现在学习的是第21页，共24页Term in dictionaryA limited period of time.期限A period of time that is assigned to a person to serve:任期A period when a school or court is in session.学期，开庭期A point in time at which something ends;termination:期限A deadline,as for ma

20、king a payment.付款的最后期限 现在学习的是第22页，共24页Term in dictionaryA word or group of words having a particular meaning专用名词One of the elements of a proposed or concluded agreement;a condition条款计划；条件The relationship between two people or groups;personal footing:关系One of the quantities composing a ratio or fract

21、ion or forming a series;One of the quantities connected by addition or subtraction signs in an equation;a member.项 现在学习的是第23页，共24页Term in textChoose a suitable placement for the gates in terms of which gates share integrated circuits and in terms of where each integrated circuit is placed on the printed circuit board.为逻辑门选择合适的布局集成电路中包含哪些逻辑门以及各个集成电路在印刷电路板上的位置。现在学习的是第24页，共24页