To provide a method for restoration of a target speech by which residual noise can be minimized by extracting only a signal included in a speech section from a separate signal generated by an ICA method.
The method for restoration of a target speech includes: a 1st step of receiving the target signal and noise each sent from two sound sources 11 and 12 by 1st and 2nd microphones 13 and 14 respectively and extracting an estimated spectrum Y* corresponding to the target speech by an independent component analysis method; a 2nd step of separating an estimated spectrum y* from which the noise is removed based upon the value of a peak of an amplitude distribution of the estimated spectrum Y* as a separation criterion; a 3rd step of finding the total F of estimated spectra y* and detecting a speech section and a noise section respectively in a frequency range of the total F based upon a threshold β determined according to the maximum value of the total as a detection criterion; and a 4th step of extracting a component present in the speech section from the estimated spectrum Y* and generating a restored spectrum groups of the target speech to restore the target speech.
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| JP2692553 | [Title of Invention] Speech recognition device |
FURUYA TAKESHI
KANEDA KEIICHI
KITAKYUSHU FOUNDATION
WAVE COME KK