电子信息技术专业英语教学课件ppt作者丁宁Unit18DSP课件.ppt

unit1 1.sequence n. 序列 * Digital signal processing is concerned with the representation of signals by sequences. 译：数字信号处理主要研究表示信号的序列。 2. estimate vt. 估计 * The purpose of such processing may be to estimate characteristic parameters of a signal or to transform a signal into a form which is in some sense more desirable. 译：这样处理的目的可能是估算信号的特征参数，也可能是把信号变换成某种更符合要求的形式。 Unit 18 DSP (Digital Signal Processing) 数字信号处理 Part Three Communication and Information Processing Technical terms: Digital Signal Processing (DSP) 数字信号处理 Fourier transform 傅立叶变换 Fast Fourier Transform (FFT) 快速傅立叶变换 spectrum analysis 频谱分析 speech bandwidth compression systems 语音带宽压缩系统 echo removal 回声消除 analog spectrum analyzers 模拟频谱分析仪 Preparing for the text: Questions for text discussion: 1. Please take some examples about the subfields of DSP. ------ Digital signal processing is concerned with the representation of signals by sequences of numbers or symbols and the processing of the sequences. 2. What is the propose of DSP? ------The goal of DSP is usually to measure, filter and/or compress continuous real-world analog signals. 3. Please describe the processing procedure of DSP. ------ ADC，digital singnal processing and DAC. Preparing for the text: The main idea of this unit: This unit mainly introduces DSP technology. What is DSP? Digital signal processing is concerned with the representation of signals by sequences of numbers or symbols and the processing of the sequences. What’s the function of DSP? The goal of DSP is usually to measure, filter and/or compress continuous real-world analog signals. (3) The processing process of DSP : ADC, digital signal processing and DAC. (4) FFT: fast Fourier transform. New Words 3. characteristic