Apparatus and method for synthesizing separated sound source

Generating spatial information on the sound source mixed in the frame of a stereo audio signal, and on the basis of the spatial information, and a step of synthesizing the separated sound source in the frequency domain from the frame of the stereo audio signal, spatial information, frequency showing the energy distribution of the azimuth angle and the frequency of a frame of stereo audio signals, a device for performing a sound source separation method comprising the synthetic azimuth plane and method is provided.