FIGURE 1-1 Applications of DSP. Joyce Van de Vegte Fundamentals of Digital Signal Processing Copyright ©2002 by Pearson Education, Inc. Upper Saddle River,

FIGURE 1-1 Applications of DSP.

Joyce Van de VegteFundamentals of Digital Signal Processing

Copyright ©2002 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458

All rights reserved.

•Touch-Tone™ telephones

•Edge detection in images

•Digital signal and image filtering

•Seismic analysis

•Text recognition

•Speech recognition

•Magnetic resonance image (MRI) scans

•Music synthesis

•Bar code readers

•Sonar processing

•Satellite image analysis

•Digital mapping

•Cellular telephones

•Digital cameras

•Detection of narcotics and explosives

•Speech synthesis

•Echo cancellation

•Cochlear implants

•Antilock brakes

•Signal and image compression

•Noise reduction

•Companding

•High definition television (HDTV)

•Digital audio

•Encryption

•Motor control

•Remote medical monitoring

•Smart appliances

•Home security

•High speed modems

FIGURE 1-2 Examples of signals.




















Courtesy Michael Noonan, Ph.D. Canisus College





FIGURE 1-3 Black and white image. ©Snap-shot.com.




FIGURE 1-4 Four frames from high-speed video sequence. “ Vision Research, Inc., Wayne, NJ., USA.
















FIGURE 1-5 Analog voltage signal.




FIGURE 1-6 Sample-and-hold signal.




FIGURE 1-7 Quantization and digitization.




FIGURE 1-8 Digital signal.




FIGURE 1-9 Zero order hold signal.




FIGURE 1-10 Recovered analog signal after smoothing.




FIGURE 1-11 A/D and D/A conversion.




FIGURE 1-12 Digital speech signal.




FIGURE 1-13 Signals and spectra.




FIGURE 1-13 Signals and spectra.




FIGURE 1-14 A single piano note (middle C) and its time trace.




FIGURE 1-15 Spectrum of middle C (200-500 Hz).




FIGURE 1-16 A piano chord (CEG) and its time trace.




FIGURE 1-17 Spectrum of CEG chord (200-500 Hz).




FIGURE 1-18 Examples of spectra.




FIGURE 1-18 Continued.




















FIGURE 1-19 Bass, tenor, alto, and soprano singing ranges.




FIGURE 1-20 Low pass filter to extract bass voices.




FIGURE 1-21 High pass filter to extract soprano voices.




FIGURE 1-22 Band pass filter to extract alto voices.




FIGURE 1-23 Spectrum for CEG chord (250-2500 Hz).




FIGURE 1-24 Low pass filtering a piano chord












FIGURE 1-25 Wireless communication system.




FIGURE 1-26 Sample and hold for Question 1.4.




FIGURE 1-27 Applying zero order hold to signal for Question 1.8.




FIGURE 1-28 Spectra for Question 1.9.




FIGURE 1-28 Spectra for Question 1.9.




FIGURE 1-29 Magnitude spectra for Question 1.10.




FIGURE 1-30 Three Touch-Tone™ digits.




Documents

FIGURE 1-1 Applications of DSP. Joyce Van de Vegte Fundamentals of Digital Signal Processing Copyright ©2002 by Pearson Education, Inc. Upper Saddle River,