| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a noise suppression device which divides an acoustic feature quantity of noise into a bias component accompanying no temporal changes and a residual component to estimate them separately from each other. <P>SOLUTION: A noise bias component estimation unit receives a logarithmic mel spectrum and parameters of a silent GMM and a clean sound GMM to optimally estimate a bias component being a centroid of an acoustic feature quantity space of a noise signal, and a noise residual component estimation unit receives the logarithmic mel spectrum, the bias component, and the parameters of the silent GMM and the clean sound GMM to optimally estimate a residual component being a difference between the noise signal and the bias component. A noise suppression unit receives the logarithmic mel spectrum, a complex spectrum, the bias component, the residual component, and parameters of the silent GMM and the clean sound GMM to output a sound signal where the noise signal has been suppressed. <P>COPYRIGHT: (C)2012,JPO&INPIT |
