Patent ID: 8825495
Filing Date: 2014-09-02
Classification: G10L

Abstract:
1. An acoustic signal decoding apparatus comprising: an output control unit configured to perform control to simultaneously output frequency domain signals having identical pieces of window information on the basis of the window information including a window shape showing the type of window function related to the frequency domain signals that are obtained by performing a windowing process on acoustic signals of a plurality of input channels; a frequency domain mixing unit configured to mix the frequency domain signals of the input channels having the identical pieces of window information on the basis of downmix information and output the signals as frequency domain signals corresponding to the number of output channels smaller than the number of the input channels; and an output sound generating unit configured to generate acoustic signals of the output channels by transforming the frequency domain signals of the output channels output from the frequency domain mixing unit into time domain signals and by performing the windowing process on the time domain signals obtained through the transforming.