| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a more efficient and highly accurate background sound suppressor capable of reducing a calculation cost and utilizing a probability density function with a more complex form. <P>SOLUTION: In a background sound suppressor 20 of the present invention, a feature quantity extraction unit 100 extracts a high resolution sound source position feature quantity and a high resolution spectral feature quantity from an observation signal, a sound source position occupation degree estimation unit 200 obtains a high resolution sound source position occupation degree, a frequency resolution reduction unit 300 reduces frequency resolution of the high resolution spectral feature quantity and the high resolution sound source position occupation degree, a low resolution occupation degree estimation unit 400 estimates a spectral parameter, a high resolution occupation degree re-estimation unit 510 estimates a high resolution occupation degree, and a target speech estimation unit 600 estimates a target speech. <P>COPYRIGHT: (C)2013,JPO&INPIT |
