- A signal, of which a sinusoid is only one example, is a
sequence of numbers.
- A continuous-time signal is an infinite and uncountable
set of numbers, as are the possible values each number can have.
- between a start and end time, there are infinite possible values
for time and instantaneous amplitude, .
- When continuous signals are brought into a computer, they must be
digitized or discretized (i.e., made discrete).
- In a discrete-time signal, the number of elements in
the set, as well as the possible values of each element, is finite,
countable, and can be represented with computer bits, and stored on a
digital storage medium.
``Music 270a: Fundamentals of Digital Audio, Discrete-Time Signals''
by Tamara Smyth,
Department of Music, University of California, San Diego (UCSD).
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Copyright © 2019-09-30 by Tamara Smyth.
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