Method of interpolating HRTF and audio output apparatus using same
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United States of America Patent
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May 22, 2018
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app pub date -
Aug 10, 2017
filing date -
Aug 11, 2016
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Abstract
A method of interpolating a head-related transfer function (HRTF) and an audio output apparatus using the same are disclosed. The method includes receiving HRTF data corresponding to a point at which an altitude angle and an azimuth angle cross and receiving complementary information about a point at which the HRTF data is present, generating an HRTF interpolation signal corresponding to an altitude angle of a sound localization point, using HRTF data corresponding to two points constituting an altitude angle segment nearest the sound location point, calculating an amount of variation up to an azimuth angle θ of the sound localization point, using complementary information of two points constituting an azimuth angle segment nearest the sound localization point, and generating a final HRTF interpolation signal corresponding to the sound localization point by applying the amount of variation to the HRTF interpolation signal corresponding to the altitude angle of the sound localization point.
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