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Digital Signal Processing http://ee.sjtu.edu.cn:8080/ Textbook : DISCRETE-TIME SIGNAL PROCESSING (2nd Edition) Alan V. Oppenheim Reference for experiment : 基于 MATLAB 的系统分析与设计 ------ 信号处理

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slide1

Digital Signal Processing

http://ee.sjtu.edu.cn:8080/

Textbook:

DISCRETE-TIME SIGNAL PROCESSING (2nd Edition)

Alan V. Oppenheim

Reference for experiment:

基于MATLAB的系统分析与设计------信号处理

楼顺天 西安电子科技大学出版社

Textbook in Chinese:

数字信号处理

刘兴钊 李力利 电子工业出版社 29 元

prof wen chen
Prof Wen Chen
  • 1. Website: wnt.sjtu.edu.cn
  • 2. Email: wenchen@sjtu.edu.cn
  • 3. Phone: 34204585
  • 5. Office: #1-520, Dianxin Building, SJTU
  • 6. TAs: ***
marking
Marking

1. Assignment 10pt, one after each chapter.

3. Experiment10分,Using Matlab。

7. Mid-term25pt。

8. Final 50pt。

9. Additional feeling 5pt.

chapter 1 introduction
CHAPTER 1 INTRODUCTION

1.what is digital signal

2.what is digital signal processing

3.character of digital signal processing

4.Application of digital signal processing

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analog signals

digital signals

Example: the storage of voice signal in different materials

vocal cord shakes

air pressure changes and spreads

Recorded using analog signals

the voltage of microphone changes

Recorded using digital signals

Recorded according to the intensity of magnetism

(1) magnetic tape:

Recorded according to the undulant channels

(2) ethane-resin disc:

Recording 0 or 1 according to the direction in which

the mote is magnetized

(3) disk:

(4) CD:

Recording 0 or 1 according to the accidented surface

2 what is digital signal processing
2. what is digital signal processing

Continuous-time low pass filter

Discrete-time low pass filter

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2D high pass

2D low pass

Digital signal processing:

additions, multiplications, delaying

realization method
Realization method

(A) software

flexible; slowly

(B) hardware

Fast,small; no flexibility

(C)hardware and software

programmable DSP chip

fast,flexible

3 character of digital signal processing
3.character of digital signal processing

(1)higher precision

(2) higher flexibility

(3) more process abilities

(4)higher reliability (programmable)

(5)cheaper

4 application of digital signal processing
4.Application of digital signal processing

(A) communications

(B) entertainment

(C) medicine

(D) military

(E) exploration

(F) archaeology

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Digital products:

DAT(digital tape recorder)

CD

MD(mini-dick)

MP3

VCD

DVD

Digital camera

Digital vidicon

Digital phone

Digital scanner

PDA

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Digital TV

Digital movie

Digital broadcasting station

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Digital network:

Internet;

LAN in offices

bluetooth

infobahn

this course includes 3 major parts
This course includes 3 major parts
  • basis of discrete-time signal and systems
  • (2) structure and designing of filter
  • (3) the discrete Fourier transform and FFT