| 摘要 |
PROBLEM TO BE SOLVED: To provide a speech processing device and a speech processing method with which distortion in speech is made less and noise is sufficiently eliminated. SOLUTION: A voice/nonvoice discriminating section 106 judges that a section of the voice spectrum is a voice section containing a voice component if the difference between the voice spectrum signal and the value of a noise base is a prescribed threshold or more and otherwise judges that the section is a nonvoice section containing no voice components and containing only noise. A comb filter generating section 107 generates a comb filter for enhancing the voice pitch according to whether or not a voice component is contained in each frequency bin. A damping coefficient calculating section 108 multiplies the comb filter by a damping coefficient, based on a frequency characteristic, determines the damping coefficient of the input signal for each frequency bin, and outputs the damping coefficient of each frequency bin to a multiplying section 109. The multiplying section 109 multiplies the voice spectrum by the damping coefficient for each frequency bin unit. A frequency synthesizing section 110 combines the spectra of the frequency bin units determined by the multiplication to synthesize a voice spectrum continuous in a frequency range in units of a prescribed processing time. COPYRIGHT: (C)2006,JPO&NCIPI
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