| 摘要 |
PROBLEM TO BE SOLVED: To provide a signal separation system accurately recognizing a user's voice with few calculation load, even if it includes an internal noise source. SOLUTION: The signal separation system includes an external microphone which purposes collection of user's voice, and an internal sensor for detecting only internal noise from the system internal noise source. An independent component analysis section separates a signal into a separation signal for outputting the internal noise and a signal group which does not include it, by optimizing a separation filter matrix. A permutation solution section performs permutation solution on the separation signal group which does not include the internal noise. In the permutation solution section, a value of a scale parameter of Laplace distribution when the separation signal is fitted by the Laplace distribution is obtained, and the separation signal which has the maximum parameter is set to be user's voice. COPYRIGHT: (C)2011,JPO&INPIT
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