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Digital Signal Processing

Digital Signal Processing

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Digital Signal Processing

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Presentation Transcript

  1. Digital Signal Processing Chapter 1: Introduction

  2. Discrete-Time Signals and Systems • Discrete-time signals

  3. Example sounds • Single tone: k02.wav, k04.wav • Machine: whistle.wav • Music: furelise.wav From: Signal Processing First, by James H. McClellan, Ronald W. Schafer, and Mark A. Yoder, Prentice Hall, 2003.

  4. Frequencies between 0 and 2

  5. The z-Transform • The unit circle

  6. Poles, zeros, and region of convergence

  7. Sampling of Continuous-Time Signals • Sampling

  8. Example: stb0m15.mov From: Signal Processing First, by James H. McClellan, Ronald W. Schafer, and Mark A. Yoder, Prentice Hall, 2003.

  9. Sampling of a cosine signal

  10. Sampling effect

  11. Aliasing

  12. Transform Analysis of Linear Time-Invariant Systems

  13. Fourier transform

  14. Structures for Discrete-Time Systems • Direct form I

  15. Direct form II

  16. Filter Design Techniques • Basic diagram

  17. Low-pass filter

  18. A CEG piano chord

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

  20. Software • Matlab

  21. Hardware • 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?catalog=4&sno=34 • 業界應用 http://www.ict.com.tw/DSP/index.htm

  22. Summary • General overview from wikipedia http://en.wikipedia.org/wiki/Digital_signal_processing

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