Patent ID: 6778601
Filing Date: 2004-08-17
Classification: H03H

Abstract:
An adaptive audio equalizer apparatus comprising:an adaptive filter including a finite impulse response filter unit, and a filter coefficient setting unit for determining a filter coefficient for said finite impulse response filter unit, said adaptive filter being for compensating an input signal that is input to said finite impulse response filter unit; a target response output unit for providing a target response signal; a speaker to which a signal that is output from said adaptive filter is supplied; a microphone for detecting an acoustic wave that is output from said speaker and converting it into an electric signal; a first calculation unit for calculating a difference between a signal that is output from said microphone and the target response signal, and for providing the result as an error signal; a delaying and multiplying unit for delaying the output of said adaptive filter and multiplying it by a scaling factor; and a second calculation unit for adding the output of said delaying and multiplying unit to said error signal, and for providing the result to said filter coefficient setting unit of said adaptive filter.