Methods of using head related transfer function (HRTF) enhancement for improved vertical-polar localization in spatial audio systems
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United States of America Patent
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Oct 27, 2015
Grant Date -
Aug 8, 2013
app pub date -
Mar 15, 2013
filing date -
May 20, 2009
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Abstract
A method of enhancing vertical polar localization of a head related transfer (HRTF). The method includes splitting an audio signal and generating left and right output signals by determining a log lateral component of the respective frequency-dependent audio gain that is equal to a median log frequency-dependent audio gain for all audio signals of that channel having a desired perceived source location. A vertical magnitude of the respective audio signal is enhanced by determining a log vertical component of the respective frequency-dependent audio gain that is equal to a product of a first enhancement factor and a different between the respective frequency-dependent audio gain at the desired perceived source location and the lateral magnitude of respective audio signal. The output signals are time delayed according to an interaural time.
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