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Filtering Sigma-Delta Audio Signals Directly

The utility of directly processing sigma-delta encoded audio signals is discussed. The problems of overflow and rounding in such a system and the consequential noise build-up are investigated. An efficient and cost-effective method of implementing a second-order filter, given the higher sample rate, is presented. The problems of coefficient accuracy are also discussed.

Authors: Angus, James A.; Casey, N. M.
Affiliation: University of York, York, Great Britain
AES Convention:102 (March 1997) Paper Number:4445 Import into BibTeX
Subject:Signal Processing

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