ACOUSTIC PROCESSING DEVICE, ACOUSTIC PROCESSING METHOD, AND STORAGE MEDIUM
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United States of America Patent
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Issued Date -
Mar 9, 2023
app pub date -
Aug 31, 2022
filing date -
Sep 7, 2021
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Abstract
A storage unit stores a first transfer function representing a transfer characteristic of a sound from a sound source for each sound source direction, a sound source direction estimating unit calculates a conversion coefficient of an acoustic signal for each channel in a frequency domain and a spatial spectrum for each sound source direction on the basis of the first transfer function and estimates a sound source direction in which the spatial spectrum becomes a maximum as an estimated sound source direction, a transfer function estimating unit estimates a transfer function for the estimated sound source direction as a second transfer function by normalizing the conversion coefficients among channels, and a transfer function updating unit updates the first transfer function for the estimated sound source direction using the second transfer function.
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