Speech Recognition using Spectral Information under Noisy Environments

이광석; 김현주

Journal of Knowledge Information Technology and Systems

Abbr : JKITS
2010, 5(5), pp.163-169
Publisher : Korea Knowledge Information Technology Society
Research Area : Interdisciplinary Research

이광석 ¹, 김현주 ²

¹진주산업대학교
²진주산업대학교

ABSTRACT

This research is concerned for improving the result of speech recognition under the noisy speech. We knew that spectral subtraction and recovery of valleys in spectral envelope obtained from noisy speech are more effective for the improvement of the recognition. In this research, the averaged spectral envelope obtained from vowel spectrums are used for the emphasis of valleys. The vocalic spectral information at lower frequency range is emphasized and the spectrum obtained from consonants is not changed. In simulation, the emphasis coefficients are varied on cepstral domain. This method is used for the recognition of noisy digits and is improved well.
KEYWORDS

Speech Recognition, Noisy Speech Processing, Spectral Envelope, Emphasis Coefficient
REFERENCES (5)

[confproc] Davis S. B. / 1980 / Comparison of Parametric Representation for Monosyllabic Word Recognition in Continuously Spoken Sentences / IEEE Trans. Acoust., Speech Signal Processing : 357~366

[journal] J-W. Hung / 2001 / New Approaches for Domain Transformation and Parameter Combination for Improved Accuracy in Parallel Model Combination (PMC) Techniques / IEEE Trans. Speech and Audio Processing 9(8) : 842~855

[confproc] Kamath, S. / 2002 / A Multiband Spectral Subtraction Method for Enhancing Speech Corrupted by Colored Noise / Proc. IEEE Int. Conf. Acoust., Speech Signal Processing : 101~111

[journal] Kim, N.S. / 2003 / Speech Recognition under Noisy Environments / 나 Telecommunications Review : 650~661

[web] ESTI Drafr Standard Doc. Speech Processing / Transmission and Quality Aspects (STQ); Distributed Speech Recognition; Front-end Feature Extraction Algorithms; Compression Algorithm / http://pda.eti.org/pda/queryform.asp
KCI Citation (1)

KJC Korea
Journal Central

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