AES E-Library

Resolution Below the Least Significant Bit in Digital Systems with Dither

This paper is motivated by some common misunderstandings about digital systems. It is commonly believed that small signals or signal details are lost if they are smaller than the quantizing step. We expand on previous arguments showing that this is not true when the signal to be quantized contains a wideband noise dither of amplitude approximately the step size. The introduction traces the use of dither from video quantization through its use in audio. Quantization error is studied in some detail and the effort of dither is analyzed theoretically and experimentally. We argue and show by examples of quantized signals that the dither effectively turns signal distortion into low-level wideband noise by linearizing the averaged quantizer staircase function, which is as perceived by the ear.

Authors: Vanderkooy, John; Lipshitz, Stanley P.
Affiliation: University of Waterloo, Waterloo, Ontario, Canada
AES Convention:72 (October 1982) Paper Number:1930 Import into BibTeX
Subject:Signal Processing and Amplification

Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD aes10)   /pp8185/pp8210/2018.pdf

Start a discussion about this paper!