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Convention Paper

Efficient Least-Mean-Squares Algorithm Performs Audio Distortion Analysis on Sampled Waveforms

Authors: Van Peteghem, P.; Vandeloo, P.; Sansen, W.

AES Convention 75 · Paper 2067 · March 1984

Abstract

The distortion components of a sampled signal (called harmonics) are determined by fitting the waveform with Least Mean Squares (L.M.S.) techniques to a sum of sinusoidal functions. This technique allows the incorporation of distortion analysis capabilities in automated test setups, without the need for expensive distortion analyzers. The basic algorithm is presented. Relationships between data word length and the accuracy of the estimations, are derived. According to calculations and measurements, Total Harmonic Distortion (T.H.D.) figures, as low as 0.01%, can be accurately measured in waveforms, which are coupled with a 12-bit A/D converter.

Details

Published in
AES Convention 75
AES Convention
75
Paper number
2067
Publication date
March 6, 1984
Session subject
Digital Processing
Affiliation
KATH IND., HOGESCHOOL / ELEKTROTECHNIEK, HEVERLEE, BELGIUM (See document for exact affiliation information.)
Type
Convention Paper