Digital Signal Processing Chapter 1 Introduction DiscreteTime Signals

Digital Signal Processing Chapter 1: Introduction

Discrete-Time Signals and Systems n Discrete-time signals

n Example sounds n Single tone: k 02. wav, k 04. wav n Machine: whistle. wav n Music: furelise. wav From: Signal Processing First, by James H. Mc. Clellan, Ronald W. Schafer, and Mark A. Yoder, Prentice Hall, 2003.

Frequencies between 0 and 2

The z-Transform n The unit circle

n Poles, zeros, and region of convergence

Sampling of Continuous-Time Signals n Sampling

n Example: stb 0 m 15. mov From: Signal Processing First, by James H. Mc. Clellan, Ronald W. Schafer, and Mark A. Yoder, Prentice Hall, 2003.

n Sampling of a cosine signal

n Sampling effect

n Aliasing

Transform Analysis of Linear Time. Invariant Systems

n Fourier transform

Structures for Discrete-Time Systems n Direct form I

n Direct form II

Filter Design Techniques n Basic diagram

n Low-pass filter

n A CEG piano chord

n A low pass filter with a cut-off of 456 Hz applied to the CEG chord extracts the signal: filt. CEG. wav n A low pass filter with a cut-off of 361 Hz applied to the CEG chord extracts the signal: filt. CE. wav n A low pass filter with a cut-off of 296 Hz applied to the CEG chord extracts the signal: filt. C. wav From: Fundamentals of Digital Signal Processing, by Joyce Van de Vegte, Prentice Hall, 2002.

Software n Matlab

Hardware n DSP與多媒體 作者：德州儀器無線通訊事業部, http: //www. ti. com. tw/articles/detail. asp? catalo g=4&sno=34 n 業界應用 http: //www. ict. com. tw/DSP/index. htm

Summary n General overview from wikipedia http: //en. wikipedia. org/wiki/Digital_signal_proce ssing

References n Discrete-Time Signal Processing, Second Edition, by Alan V. Oppenheim, Ronald W. Schafer, and John R. Buck, Prentice Hall, 1999. n Fundamentals of Digital Signal Processing, by Joyce Van de Vegte, Prentice Hall, 2002. n Signal Processing First, by James H. Mc. Clellan, Ronald W. Schafer, and Mark A. Yoder, Prentice Hall, 2003.