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KMID : 0917520020090040275
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Journal of Speech Sciences
2002 Volume.9 No. 4 p.275 ~ p.287
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Enhancement of Speech Using the Adaptive Signal Processing
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Abstract
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In-man-machine communication by speech under the noishy environment, the quality of speech may be degraded severely for the machine to recognize correctly. Especially when the corrupting noise occupies the same band as the speech, the conventional fixed filters cannot filter out the noise effectively. In recent, to resolve such a problem adaptive snoise canceller (ANC) is frequently used, which is based upon adaptive filters. Tfhe Adaptive recursive filters perform better than adaptive nonrecursive filters due to the added poles, but the stability may be severely threatended. In this paper an ANC system employing the adaptive recursive filter is proposed to enhance the speech corrupted by noise. And the stability of the adaptive recursive filter is guarantedd by employing the adaptive compensator.
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