Title:
TONE QUALITY ADJUSTMENT DEVICE DESIGNING METHOD AND DESIGNING DEVICE, TONE QUALITY ADJUSTMENT DEVICE DESIGNING PROGRAM, AND TONE QUALITY ADJUSTMENT DEVICE
Document Type and Number:
WIPO Patent Application WO/2003/096534
Kind Code:
A1
Abstract:
A waveform of a desired frequency characteristic is input as a numeric value string and is subjected to reverse FFT so as to obtain a filter coefficient group. Thus, without having any expert knowledge, only by inputting a waveform of a desired frequency characteristic as an image, it is possible to easily design a first FIR filter constituting a tone quality adjustment device. Moreover, by performing a predetermined calculation on the numeric value string input and performing a reverse FFT to the result, it is possible to easily design a second FIR filter having a frequency characteristic symmetric to the first FIR filter with respect to the gain reference value as an axis.
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Inventors:
KOYANAGI YUKIO (JP)
Application Number:
PCT/JP2003/005263
Publication Date:
November 20, 2003
Filing Date:
April 24, 2003
Export Citation:
Assignee:
NEURO SOLUTION CORP (JP)
KOYANAGI YUKIO (JP)
KOYANAGI YUKIO (JP)
International Classes:
G10L19/26; H03H17/06; (IPC1-7): H03H17/06; H04R3/04
Foreign References:
| JPH05259783A | 1993-10-08 | |||
| JPS63234617A | 1988-09-29 | |||
| JPS6196817A | 1986-05-15 | |||
| JPH0766685A | 1995-03-10 | |||
| JPH1079644A | 1998-03-24 | |||
| JP2001273278A | 2001-10-05 |
Attorney, Agent or Firm:
Tachibana, Kazuyuki (Oaza-Shimoshingashi Kawagoe-shi, Saitama, JP)
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