METHOD AND APPARATUS TO EQUALIZE ACOUSTIC RESPONSE OF A SPEAKER SYSTEM USING MULTI-RATE FIR AND ALL-PASS IIR FILTERS

摘要

A speaker system includes an electronic signal processing unit configured to split an input audio signal into a low-pass audio component and a high-pass audio component. The electrical signal processing unit includes a multi-rate finite impulse response (FIR) filter configured to downsample the low-pass audio component and sample the downsampled lowpass audio component at a first sampling rate lower than a second sampling rate used to sample the high-pass audio component. The speaker system further includes an electronic adaptive equalizer coefficient (EAEC) module configured to dynamically determine at least one equalizer coefficient based on a signal characteristic of the input audio signal. An electronic filter coefficient update unit (FCUU) is included and is configured to control a frequency response of the speaker system based on the at least one equalizer coefficient.