Because a digital system contains a fixed number of discrete levels, there will be a difference between the digital representation and the analog signal. The subjective consequences of this quantization error is a function of the program. For complex high-level program it is white noise; for complex low-level program, it is a kind of distortion. With sine waves an extraneous set of beat tones will be generated. For example, a 9.33-kHz input signal with a 30-kHz sampling system will generate a 2-kHz beat tone.

Author: Blesser, Barry A.
Affiliation: Department of Electrical Engineering, Research Laboratory of Electronics, Massachusetts Institute of Technology, CambrMge, MA
JAES Volume 22 Issue 1 pp. 20-22; February 1974
Publication Date: February 1, 1974

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