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KMID : 0917519980040020005
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Journal of Speech Sciences
1998 Volume.4 No. 2 p.5 ~ p.15
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A SPECTRAL SUBTRACTION USING PHONEMIC AND AUDITORY PROPERTIES
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Kang, Sunmee
Kim, Wooil/Ko, Hanseok
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Abstract
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this paper proposes a speech state-dependent spectral subraction method to regulate the blind spectral subraction for improved enhancement. In the proposed method, a modified subtraction rule is applied over the speech selectively contingent to the speech state being voiced or unvoiced, in an effort to incorporate the acoustic characteristics of phonmes. In particula, the objective of the proposed method is to remedy the subtraction induced signal distortion attained by two stat-dependent procedures, spectrum sharpening and minmim spectral bound. In order to remove the residual noise, the proposed method employs a procedure utilizing the masking effect. Proposed spectral subtraction including state-dependent subraction and residual noise reduction using the masking threshold shows effectiveness in compensation of spectral distortion in the unvoiced region and residual noise reductin.
Keywords: spectral subtraction, phonemic, auditory properties, mask effect, noise reduction
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KEYWORD
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