Three-dimensional virtual audio display employing reduced complexity imaging filters
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United States of America Patent
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Jun 6, 2000
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N/A
app pub date -
Aug 6, 1997
filing date -
Sep 9, 1994
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Abstract
A three-dimensional virtual audio display method is described which includes generating a set of transfer function parameters in response to a spatial location or direction signal. An audio signal is filtered in response to the set of transfer function parameters. The set of transfer function parameters are selected from or interpolated among parameters derived by smoothing frequency components of a known transfer function over a bandwidth which is a non-constant function of frequency. The smoothing includes for each frequency component in at least part of the audio band of the display, applying a mean function to the amplitude of the frequency components within the bandwidth containing the frequency component, and noting the parameters of the resulting compressed transfer function.
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