McCarter & English, LLP
Propagation delay correction apparatus and propagation delay correction method
A propagation delay tune correction apparatus comprising a means for generating a frequency spectrum signal by performing short-term Fourier transform on an audio signal; a means for setting a propagation delay time for each of a plurality of predetermined frequency bands; a means for calculating a phase control amount for each of the plurality of predetermined frequency bands on a basis of the propagation delay time set for each of the plurality of predetermined frequency bands; a means for generating a phase control signal by smoothing the calculated phase control amount for each of the plurality of predetermined frequency bands; a means for controlling a phase of the frequency spectrum signal for each of the plurality of predetermined frequency bands on a basis of the generated phase control signal; and a means for generating an audio signal on which a propagation delay correction is performed by performing inverse short-term Fourier transform on the frequency spectrum signal of which the phase is controlled for each of the plurality of predetermined frequency bands.
CLARION CO., LTD.
H H H H H H H H
H04S H04R H04S H03H H04R H03H H04S H03H
inventional additional additional inventional inventional inventional inventional inventional
Takeshi Kazutomo Yasuhiro Tetsuo
Hashimoto Fukue Fujita Watanabe