Where sampling is the process of taking a sample at regular time
intervals...
Quantization is the process of assigning a value (from a
finite number of possibilities) to the amplitude of the signal at
a time sample.
Computers use bits to store such data.
The higher the number of bits used to represent a value, the
greater the number of possible values and the more precise the
sampled amplitude will be.
With
bits,
possible values that can be represented.
For CD quality audio, the number of bits is
:
- each sample can have
possible values;
- the highest possible amplitude is
, (since
audio signals are positive and negative).
Does quantization introduce error?
``Music 171: Fundamentals of Digital Audio''
by Tamara Smyth,
Department of Music, University of California, San Diego (UCSD).
Download PDF version (digitalAudio171.pdf)
Download compressed PostScript version (digitalAudio171.ps.gz)
Download PDF `4 up' version (digitalAudio171_4up.pdf)
Download compressed PostScript `4 up' version (digitalAudio171_4up.ps.gz)
Copyright © 2019-10-15 by Tamara Smyth.
Please email errata, comments, and suggestions to Tamara Smyth<trsmyth@ucsd.edu>