| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress, in picked-up sound signals containing momentary non-constant noise that overlaps sounds emitted by a sounding body, the non-constant noise. <P>SOLUTION: A converter 1 converts into spectra of frequency ranges picked-up sound signals obtained by picking up sounds emitted by a sounding body and expressed in a time domain; a suppressive gain setter 2 sets a suppressive gain, representing the extent of suppressing each spectrum, for each frequency of the spectrum on the basis of the quantity of variation of the degree of non-constancy regarding the pertinent spectrum; a spectral suppression processor 3 processes suppression of each spectrum on the basis of the suppressive gain set by the suppressive gain setter 2 for each frequency of each spectrum; and an inverse converter 4 subjects the spectra having gone through the suppression processing by the spectral suppression processor 3 to conversion inverse to the conversion by the converter 1. <P>COPYRIGHT: (C)2012,JPO&INPIT |
