Patent ID: 8019087
Filing Date: 2011-09-13
Classification: G10L

Abstract:
1. A stereo signal generating apparatus, comprising: a transformer that transforms a time domain monaural signal, obtained from signals of right and left channels of a stereo signal, into a frequency domain monaural signal; a power calculator that finds a first power spectrum of the frequency domain monaural signal; a scaling ratio calculator that finds a first scaling ratio for a power spectrum of the left channel of the stereo signal from a first difference between the first power spectrum and a power spectrum of the left channel of the stereo signal, and that finds a second scaling ratio for the right channel from a second difference between the first power spectrum and a power spectrum of the right channel of the stereo signal; and a multiplier that multiplies the frequency domain monaural signal by the first scaling ratio to generate a left channel signal of the stereo signal, and that multiplies the frequency domain monaural signal by the second scaling ratio to generate a right channel signal of the stereo signal.