Transcription of What Is Digital Signal Processing? - sp4comm.org
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What Is Digital Signal Processing? - sp4comm.org
Chapter 1 What Is Digital Signal Processing? Asignal, technically yet generally speaking, is a a formal description of aphenomenon evolving over time or space; bysignal processingwe denoteany manual or mechanical operation which modifies, analyzes or other-wise manipulates the information contained in a Signal . Consider the sim-ple example of ambient temperature: once we have agreed upon a formalmodel for this physical variable Celsius degrees, for instance we canrecord the evolution of temperature over time in a variety of ways and theresulting data set represents a temperature Signal .
Digital signal processing is aflavor of signal processing in which everything including time is described in terms of integer num- bers; in other words, the abstract representation of choice is a one-size-fit-
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