Previous work has shown that inverse filtering can degrade the subjective quality of audio signals in certain conditions. Minimum phase inversion and regularization applied separately have also been studied and can be effective in some cases, but neither technique has proven to be robust. In this paper, further methods involving various regularization methods applied to the full and minimum phase part of the impulse response (IR) are studied. Subjective tests were conducted in accordance with the MUSHRA method to evaluate the performance of the various inversion methods. The results of the subjective tests were also used to determine the effectiveness of the ITU-R PEAQ objective test model as a potential tool in the development and evaluation of inverse filtering techniques.

Authors: Norcross, Scott G.; Soulodre, Gilbert A.; Lavoie, Michel C.
Affiliation: Communications Research Centre, Ottawa Ontario, Canada
AES Convention: 115 (October 2003) Paper Number: 5923
Publication Date: October 1, 2003
Subject: Signal Processing

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