CH1 - CHAPTER 1 The Breadth and Depth of DSP Digital Signal...

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1 CHAPTER 1 The Breadth and Depth of DSP Digital Signal Processing is one of the most powerful technologies that will shape science and engineering in the twenty-first century. Revolutionary changes have already been made in a broad range of fields: reproduction, and oil prospecting, to name just a few. Each of these areas has developed a deep DSP technology, with its own algorithms, mathematics, and specialized techniques. This combination of breath and depth makes it impossible for any one individual to master all of the DSP technology that has been developed. DSP education involves two tasks: learning general concepts that apply to the field as a whole, and learning specialized techniques for your particular area of interest. This chapter starts our journey into the world of Digital Signal Processing by describing the dramatic effect that DSP has made in several diverse fields. The revolution has begun. The Roots of DSP Digital Signal Processing is distinguished from other areas in computer science by the unique type of data it uses: signals . In most cases, these signals originate as sensory data from the real world: seismic vibrations, visual images, sound waves, etc. DSP is the mathematics, the algorithms, and the techniques used to manipulate these signals after they have been converted into a digital form. This includes a wide variety of goals, such as: enhancement of visual images, recognition and generation of speech, compression of data for storage and transmission, etc. Suppose we attach an analog-to-digital converter to a computer and use it to acquire a chunk of real world data. DSP answers the question: What next ? The roots of DSP are in the 1960s and 1970s when digital computers first became available. Computers were expensive during this era, and DSP was limited to only a few critical applications. Pioneering efforts were made in four key areas: , where national security was at risk; oil exploration , where large amounts of money could be made; space exploration , where the
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The Scientist and Engineer's Guide to Digital Signal Processing 2 DSP Space Medical Commercial Military Scientific Industrial Telephone -Earthquake recording & analysis -Data acquisition -Spectral analysis -Simulation and modeling -Oil and mineral prospecting -Process monitoring & control -Nondestructive testing -CAD and design tools -Radar -Sonar -Ordnance guidance -Secure communication -Voice and data compression -Echo reduction -Signal multiplexing -Filtering -Image and sound compression for multimedia presentation -Movie special effects -Video conference calling -Diagnostic imaging (CT, MRI, ultrasound, and others) -Electrocardiogram analysis -Medical image storage/retrieval -Space photograph enhancement -Data compression -Intelligent sensory analysis by remote space probes FIGURE 1-1 DSP has revolutionized many areas in science and engineering. A few of these diverse applications are shown here. data are irreplaceable; and
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CH1 - CHAPTER 1 The Breadth and Depth of DSP Digital Signal...

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