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A common use of quantization is in the conversion of a [[discrete signal]] (a [[sample (signal)|sampled]] [[continuous signal]]) into a [[digital signal]] by quantizing.
Both of these steps (sampling and quantizing) are performed in [[analog-to-digital converter]]s with the quantization level specified in [[bit]]s.
A specific example would be [[compact disc]] (CD) audio which is sampled at 44,100 [[Hertz|Hz]] and quantized with 16 bits (2 [[byte]]s) which can be one of 65,536 (<math>2^{16}</math>) possible values per sample.
== Mathematical description ==
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