1. 1 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

2. 2 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: ***

3. 3 Marking 1. Assignment 10pt, one after each chapter. 3. Experiment10 分， Using Matlab 。 7. Mid-term25pt 。 8. Final 50pt 。 9. Additional feeling 5pt.

4. 4 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

5. 5 1.what is digital signal x(t) x[n]

6. 6 (4) CD ： Example: the storage of voice signal in different materials vocal cord shakesair pressure changes and spreads the voltage of microphone changes Recorded using analog signals (1) magnetic tape ： (2) ethane-resin disc ： (3) disk ： Recorded according to the intensity of magnetism Recorded according to the undulant channels Recording 0 or 1 according to the direction in which the mote is magnetized Recording 0 or 1 according to the accidented surface analog signals digital signals Recorded using digital signals

7. 7 Continuous-time low pass filter Discrete-time low pass filter 2. what is digital signal processing

8. 8 2D low pass 2D high pass Digital signal processing: additions, multiplications, delaying

9. 9 (C)hardware and software Realization method (A) software (B) hardware flexible; slowly Fast,small; no flexibility fast ， flexible programmable DSP chip

10. 10 Example of hardware and software realization

11. 11 3.character of digital signal processing (4)higher reliability (programmable) (1)higher precision (2) higher flexibility (3) more process abilities (5)cheaper

12. 12 The advantage of digital TV: DTVATV source codingMPEG2PAL/NTSC/SECAM transport and receivingdigitalanalog Subjective qualityStudio, nearly; Only relative to compression; Advanced transport technologies (channel coding, modulation) to wipe off the influence from environment (multipath interference); Can not achieve the effect of SDTV; Influenced by environment; resourceSave power (10%) and spectrum; an analog channel transports 4 SDTV (or 1 HDTV) Forbidden channels, the channels nearby can not be used, 2 channels transport 1 program; functionStereo surround; Transport data; VOD; Mobile broadcast; One track/dimensional sound; Transport only a little data; Be not mobile;

13. 13 (F) archaeology 4.Application of digital signal processing (A) communications (B) entertainment (C) medicine (D) military (E) exploration

14. 14 DAT （ digital tape recorder ） CD MD （ mini-dick ） MP3 VCD DVD Digital camera Digital vidicon Digital phone Digital scanner PDA Digital products:

15. 15 Digital broadcasting station Digital TVDigital movie

16. 16 Digital communication

17. 17 Digital network ： Internet; LAN in offices bluetooth infobahn

18. 18

19. 19 Virtual Reality Technology

20. 20

21. 21 electronic paper:

22. 22 (1)basis of discrete-time signal and systems (2) structure and designing of filter (3) the discrete Fourier transform and FFT This course includes 3 major parts