Lesson_01_Into to DSP_V4

Lesson_01_Into to DSP_V4 - Digital Signal Processing Dr....

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Digital Signal Processing Dr. Fred J. Taylor, Professor INTRODUCTION - 1 Topic: Introduction to Digital Signal Processing (DSP) Lecture 01 What’s it all about? Origins of DSP Signal domains o Continuous-time o Discrete-time o Digital DSP advantages and disadvantages Introduction Signal processing refers to the art and science of creating, modifying, manipulating, extracting, and displaying signal information and attributes. Since the dawn of time, man has been the quintessential signal processor. Human-centric signal processing was performed using one of the most powerful signal processing engines ever developed, the 25 Watt human brain (which commits about 10 Watts to information processing, comparable to an Intel mobile Pentium III processor). As humans evolved, other agents were added to man’s signal processing environment and repertoire, such as information coding in the form of intelligible speech, art, and the written word. In time, communication links expanded from local, to global, global to galactic. It was, however, the introduction of electronics that enabled the modern information revolution. Analog electronics gave rise to such innovations as the plain old telephone system (POTS), radio, television, radar/sonar and a host of other inventions that have revolutionized man’s life and landscape. With the introduction of digital technologies over a half century ago, man has witness a true explosion of innovations that have facilitated the replacement of many of the analog solutions into systems having a high digital content. In other instances, digital technology has enabled solutions that previously never existed. Included in this list include digital entertainment systems, digital cameras, digital mobile telephony, and so forth. In some cases, digital technology has been a disruptive technology , giving rise to products that where impossible to envision prior to the technologies existence. A example of this is the now ubiquitous personal digital computer.
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Digital Signal Processing Dr. Fred J. Taylor, Professor INTRODUCTION - 2 Origins of DSP Regardless of the information source, or the type of machine used to process that information, engineers and scientists have habitually attempted to reduce signals to a set of parameters that can be mathematically manipulated, combined, dissected, analyzed, or archived. This obsession has been fully actualized with the advent of the digital computer. One of the consequences of this fusion of man and machine has been the development of a new field of study called digital signal processing , or DSP . Some scholars trace the origins of DSP to the invention of iterative computing algorithms discovered by the ancient mathematicians. An early example of a discrete data generator was provided in 1202 by the Italian mathematician Leonardo da Pisa ( a.k.a . Fibonacci 1 ). Fibonacci proposed a recursive formula for counting newborn rabbits, assuming that after mating an adult pair would produce another pair of
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Lesson_01_Into to DSP_V4 - Digital Signal Processing Dr....

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