The present invention relates to a method and an apparatus for
processing a
signal, which are used to effectively reproduce an
audio signal, and more particularly, to a method and an apparatus for
processing an
audio signal, which are used for implementing a filtering for input audio signals with a low computational complexity.To this end, provided are a method for
processing an
audio signal including: receiving an input audio
signal; receiving truncated subband filter coefficients for filtering each subband
signal of the input audio signal, the truncated subband filter coefficients being at least a portion of subband filter coefficients obtained from binaural room
impulse response (BRIR) filter coefficients for binaural filtering of the input audio signal, the lengths of the truncated subband filter coefficients being determined based on filter order information obtained by at least partially using characteristic information extracted from the corresponding subband filter coefficients, and the truncated subband filter coefficients being constituted by at least one FFT filter coefficient in which
fast Fourier transform (FFT) by a predetermined
block size in the corresponding subband has been performed; performing the
fast Fourier transform of the subband signal based on a predetermined
subframe size in the corresponding subband; generating a filtered
subframe by multiplying the fast Fourier transformed
subframe and the FFT filter coefficients; inverse fast Fourier transforming the filtered subframe; and generating a filtered subband signal by overlap-adding at least one subframe which is inverse fast Fourier transformed and an apparatus for processing an audio signal using the same.