Method and apparatus for enhancing loudness of an audio signal

Details Method and apparatus for enhancing loudness of an audio signal Method and apparatus for enhancing loudness of an audio signal

2007-02-13

2007-02-13

McFadden, Susan (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

Reexamination Certificate

active

10277407

ABSTRACT:
Human hearing perceives loudness based on critical bands corresponding to different frequency ranges. As a sound's frequency spectrum increases beyond a critical band into a previously unexcited critical band, the perception is that the sound has increased in loudness. To take advantage of this principle, a filter is applied to a speech signal so as to expand the formant bandwidths of formants in the speech sample.

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Boillot, M.A., and Harris, J.G., “A Loudness Enhancement Technique for Speech.” (UNPUBLISHED).
Boillot, M.A., and Harris, J.G., “A Warped Bandwidth Expansion Filter.” (UNPUBLISHED).
Boillot, M.A., and Harris, J.G., “A Loudness Approximation to the ISO-532B.” (UNPUBLISHED).
Reinke, T.L., Skowronski, M.D., and Harris, J.G., “Speech Intelligibility Enhancement: Energy Redistribution Using Vocalic and Transitional Cues.” (UNPUBLISHED.

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