Patent ID: 9053701
Filing Date: 2015-06-09
Classification: G10L,H04S

Abstract:
1. A channel signal generation apparatus for generating a frequency domain first channel signal for a first channel and a frequency domain second channel signal for a second channel by using a frequency domain monaural signal generated by using a first stereo signal for the first channel and a second stereo signal for the second channel, which constitute an acoustic signal, the channel signal generation apparatus comprising: a monaural encoder structured to generate a monaural signal from the first stereo signal and the second stereo signal and to generate the frequency domain monaural signal from the monaural signal; and a generator structured to receive the frequency domain monaural signal from said monaural encoder and to generate the frequency first channel signal and the frequency domain second channel signal by performing change processing on the frequency domain monaural signal, where the change processing compensates for the phase difference between the first stereo signal and the second stereo signal in accordance with input determination data, wherein the generator performs the change process by storing a plurality of previously defined modified matrices, selecting one modified matrix from the plurality of modified matrices in accordance with phase data about the phase difference, which is input as the determination data, and performing arithmetic operation on the frequency domain monaural signal and the selected modified matrix.