Tone quality adjustment device designing method and...

Details Tone quality adjustment device designing method and... Tone quality adjustment device designing method and...

2004-11-03

2008-07-15

Fan, Chieh M. (Department: 2611)

Pulse or digital communications

Equalizers

Automatic

C370S525000

Reexamination Certificate

active

07400676

ABSTRACT:
A waveform of a desired frequency characteristic is input as a numeric value string and is subjected to a reverse FFT so as to obtain a filter coefficient group. Thus, without having any expert knowledge and 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 on 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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