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1. (WO2014208319) FILTER COEFFICIENT GROUP COMPUTATION DEVICE AND FILTER COEFFICIENT GROUP COMPUTATION METHOD

Pub. No.:    WO/2014/208319    International Application No.:    PCT/JP2014/065197
Publication Date: Thu Jan 01 00:59:59 CET 2015 International Filing Date: Tue Jun 10 01:59:59 CEST 2014
IPC: G06F 17/10
G10K 15/00
G10L 21/0364
G10L 25/18
H03G 5/02
Applicants: CLARION CO., LTD.
クラリオン株式会社
Inventors: FUKUE, Kazutomo
福江 一智
Title: FILTER COEFFICIENT GROUP COMPUTATION DEVICE AND FILTER COEFFICIENT GROUP COMPUTATION METHOD
Abstract:
A filter coefficient group computation device is configured from: a means for applying an inverse Fourier transform to a frequency characteristic which is inputted via an input means; a means for applying a short-term Fourier transform to a number sequence which is obtained by the inverse Fourier transform; a means for applying a window function where the higher the frequency, the shorter the window length, to a signal of a frequency domain which is obtained by the short-term Fourier transform; a means for applying an inverse short-term Fourier transform to the signal of the frequency domain after the applying window function; a means for overlap-adding the number sequence which is obtained by the short-term Fourier transform; and a means for determining the number sequence after the overlap-addition as a filter coefficient group which forms a filter of the frequency characteristic which is inputted by the input means.