Frequency characteristic modification device

Abstract

A device includes a HPF 702 that modifies frequency characteristics of a target signal; a phase correcting unit 701 that corrects the phase characteristics of the target signal to make the phase characteristics nearly equal to phase characteristics of the HPF 702; a first multiplier 705 that adjusts the gain of the signal output from the phase correcting unit 701; a second multiplier 706 that adjusts the gain of the signal output from the HPF 702; a coefficient determining unit that determines the gain coefficients of the first and second multipliers 705 and 706 in such a manner that the sum of the gain coefficient of the first multiplier 705 and the gain coefficient of the second multiplier 706 becomes a fixed value; and an adder 713 that adds the two signals output from the first multiplier 705 and second multiplier 706.

Dependencies are inferred from the claim text.