CPC H04S 7/307 (2013.01) [H04R 3/005 (2013.01); H04R 3/04 (2013.01); H04R 5/027 (2013.01); H04R 5/04 (2013.01); H04S 1/007 (2013.01); H04S 2400/15 (2013.01)] | 8 Claims |
8. A processing method comprising:
acquiring frequency characteristics of an input signal;
performing a smoothing processing so as to generate second spectral data smoother than first spectral data, the first spectral data being based on the frequency characteristics;
calculating a first difference value corresponding to a difference between the second spectral data and the first spectral data in a first band;
a first compressing, based on the first difference value, the second spectral data;
generating a filter, based on compressed second spectral data; and
a second compressing including:
calculating a second difference value corresponding to a difference between third spectral data generated by first compressing and a predetermined reference value in a gain of spectral data; and
compressing the third spectral data, based on the second difference value, and wherein the filter comprises a spatial acoustic filter, corresponding to spatial acoustic transfer characteristics, for improving sound quality.
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