Patent ID: 7046724

Claim:
An equalizer apparatus, comprising: a sampled voice data extractor configured to extract sampled voice data in a first time slot from the sampled voice data corresponding to a received voice signal; a sampled noise data extractor configured to extract sampled noise data in the first time slot and a second and third time slots before and after the first time slot from the sampled noise data corresponding to noise in a surrounding area of the apparatus; a sampled voice data characteristics corrector configured to correct characteristics of the sampled voice data in the first time slot extracted by the sampled voice data extractor based on characteristics of the sampled noise data in the first through third time slots extracted by the sampled noise data extractor; and the sampled voice data characteristics corrector comprising a first fast Fourier transformation part configured to perform fast Fourier transformation on the sampled voice data in the first time slot so as to generate a voice frequency spectrum and a second fast Fourier transformation part configured to perform fast Fourier transformation on the sampled noise data in the first through third time slots so as to generate a noise frequency spectrum; a divider configured to calculate a value by dividing the noise frequency spectrum generated by the second fast Fourier transformation part by a ratio of the first through third time slots to the first time slot.