| 摘要 |
It is possible to provide a signal processing device which can preferably restore a target original signal from a mixed signal obtained by mixing a plurality of original signals. An isolated signal generation unit (20) generates a plurality of isolated signals independent from one another from one frame of the mixed signal converted into a frequency region. According to a first and a second isolated signal, a mask processing unit (30) judges the noise state of the first separated signal for each of frequency bins. Moreover, the mask processing unit (30)removes from the first isolated signal, a first noise component obtained according to the judgment result of the noise state. A noise amount measuring unit (40) measures a noise amount of the first isolated signal. According to the noise amount measured by the noise amount measuring unit, a noise signal selection unit (50) selects a noise signal for each of frequencies. A noise removal processing unit (60) removes the second noise component form the noise removal signal inputted from the mask processing unit (30) for each of the frequency bins. The noise removal processing unit (60) outputs as a target signal, the noise-removed signal from which the second noise component has been removed. |
