(57) The present invention relates to a method and an apparatus for processing an audio
signal, and more particularly, to a method and an apparatus for processing an audio
signal, which synthesizes an object signal and a channel signal and effectively binaural-render
the synthesized signal.
To this end, the present invention provides a method for processing an audio signal,
including: receiving an input audio signal including at least one of a multichannel
signal and a multi-object signal; receiving type information of a filter set for binaural
filtering of the input audio signal, the type of the filter set being one of a finite
impulse response (FIR) filter, a parameterized filter in a frequency domain, and a
parameterized filter in a time domain; receiving filter information for binaural filtering
based on the type information; and performing the binaural filtering for the input
audio signal by using the received filter information, wherein when the type information
indicates the parameterized filter in the frequency domain, in the receiving of the
filter information, a subband filter coefficient having a length determined for each
subband of a frequency domain is received, and in the performing of the binaural filtering,
each subband signal of the input audio signal is filtered by using the subband filter
coefficient corresponding thereto and an apparatus for processing an audio signal
by using the same.
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