| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a speech enhancement device for which space information is available. <P>SOLUTION: A feature quantity estimation part regards a multichannel sound signal as observation signal and extracts feature quantities of sound signals of respective channels, and an acoustic strain parameter estimation part uses a feature quantity of a multichannel observation signal and a clean speech Gaussian mixed model as input and performs maximum likelihood estimation of an acoustic strain parameter relating to an additive noise component included in the observation signal and a channel response strain. Then, a clean voice feature quantity estimation part estimates a feature quantity of a clean speech signal by using the feature quantity of a multichannel observation signal, the acoustic strain parameter estimated in the acoustic strain parameter estimation part, and the clean speech Gaussian mixed model as input and by performing least square error estimation of the clean speech signal included in the observation signal. <P>COPYRIGHT: (C)2013,JPO&INPIT |
