Abstract
Despite their widespread popularity as front-end parameters for speech recognition, the cepstral coefficients derived from either linear prediction analysis or a filter-bank are found to be sensitive to additive noise. In this letter, we discuss the use of spectral subband centroids for robust speech recognition. We show that centroids, if properly selected, can achieve recognition performance comparable to that of the mel-frequency cepstral coefficients (MFCCs) in clean speech, while delivering better performance than MFCC in noisy environments. A procedure is proposed to construct the dynamic centroid feature vector that essentially embodies the transitional spectral information. We discuss some properties of the proposed dynamic features.
Original language | English |
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Pages (from-to) | 258-261 |
Number of pages | 4 |
Journal | IEEE Signal Processing Letters |
Volume | 11 |
Issue number | 2 PART II |
DOIs | |
State | Published - Feb 2004 |
Externally published | Yes |
Keywords
- Cepstrum
- Robust speech recognition
- Subband centroid