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Convention Paper

A New Method of Applying High Levels of Dither to Delta-Sigma Modulators

Authors: Angus, James A. S.

AES Convention 117 · Paper 6296 · October 2004

Abstract

This paper presents a new a new method of applying high levels of dither to Sigma-Delta Modulators. In particular, it clarifies the position of the overload point in one-bit Sigma-Delta Modulation systems and presents several overload control methods with comparisons of their efficacy. It then goes on to examine the problem of applying dither to one-bit systems and describes a new approach for applying high levels of dither. It also examines the effect of different dither probability density distributions and shows that simple bi-level dither can be effective at lower levels than other probability density distributions. It presents results, which show that dither can be applied at a high enough level to be effective in one-bit Sigma-Delta Modulation systems.

Details

Published in
AES Convention 117
AES Convention
117
Paper number
6296
Publication date
October 6, 2004
Session subject
High Resolution Audio
Affiliation
Acoustics Research Centre, Research Institute for the Built and Human Environment, University of Salford, Salford, Greater Manchester, England (See document for exact affiliation information.)
Type
Convention Paper