Spectral Peak-Weighted Liftering of Cepstral Coefficients for Speech Recognition
Summary :
In this paper, we propose a peak-weighted cepstral lifter (PWL) for enhancing the spectral peaks of an all-pole model spectrum in the cepstral domain. The design parameter of the PWL is the degree of pole enhancement or pole shifting toward the unit circle. The optimal pole shifting factor is chosen by considering the sensitivity to spectral resonance peaks, the variability of cepstral variances, and the recognition accuracy. Next, we generalize the PWL so that the optimal shifting factor is adaptively determined in frame-by-frame basis. Compared with other cepstral lifters, a speech recognizer employing the frame-adaptive PWL provides better recognition performance.
- Publication
- IEICE TRANSACTIONS on Information Vol.E83-D No.7 pp.1540-1549
- Publication Date
- 2000/07/25
- Publicized
- Online ISSN
- DOI
- Type of Manuscript
- PAPER
- Category
- Speech and Hearing
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Hong Kook KIM, Hwang Soo LEE, "Spectral Peak-Weighted Liftering of Cepstral Coefficients for Speech Recognition" in IEICE TRANSACTIONS on Information,
vol. E83-D, no. 7, pp. 1540-1549, July 2000, doi: .
Abstract: In this paper, we propose a peak-weighted cepstral lifter (PWL) for enhancing the spectral peaks of an all-pole model spectrum in the cepstral domain. The design parameter of the PWL is the degree of pole enhancement or pole shifting toward the unit circle. The optimal pole shifting factor is chosen by considering the sensitivity to spectral resonance peaks, the variability of cepstral variances, and the recognition accuracy. Next, we generalize the PWL so that the optimal shifting factor is adaptively determined in frame-by-frame basis. Compared with other cepstral lifters, a speech recognizer employing the frame-adaptive PWL provides better recognition performance.
URL: https://global.ieice.org/en_transactions/information/10.1587/e83-d_7_1540/_p
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@ARTICLE{e83-d_7_1540,
author={Hong Kook KIM, Hwang Soo LEE, },
journal={IEICE TRANSACTIONS on Information},
title={Spectral Peak-Weighted Liftering of Cepstral Coefficients for Speech Recognition},
year={2000},
volume={E83-D},
number={7},
pages={1540-1549},
abstract={In this paper, we propose a peak-weighted cepstral lifter (PWL) for enhancing the spectral peaks of an all-pole model spectrum in the cepstral domain. The design parameter of the PWL is the degree of pole enhancement or pole shifting toward the unit circle. The optimal pole shifting factor is chosen by considering the sensitivity to spectral resonance peaks, the variability of cepstral variances, and the recognition accuracy. Next, we generalize the PWL so that the optimal shifting factor is adaptively determined in frame-by-frame basis. Compared with other cepstral lifters, a speech recognizer employing the frame-adaptive PWL provides better recognition performance.},
keywords={},
doi={},
ISSN={},
month={July},}
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TY - JOUR
TI - Spectral Peak-Weighted Liftering of Cepstral Coefficients for Speech Recognition
T2 - IEICE TRANSACTIONS on Information
SP - 1540
EP - 1549
AU - Hong Kook KIM
AU - Hwang Soo LEE
PY - 2000
DO -
JO - IEICE TRANSACTIONS on Information
SN -
VL - E83-D
IS - 7
JA - IEICE TRANSACTIONS on Information
Y1 - July 2000
AB - In this paper, we propose a peak-weighted cepstral lifter (PWL) for enhancing the spectral peaks of an all-pole model spectrum in the cepstral domain. The design parameter of the PWL is the degree of pole enhancement or pole shifting toward the unit circle. The optimal pole shifting factor is chosen by considering the sensitivity to spectral resonance peaks, the variability of cepstral variances, and the recognition accuracy. Next, we generalize the PWL so that the optimal shifting factor is adaptively determined in frame-by-frame basis. Compared with other cepstral lifters, a speech recognizer employing the frame-adaptive PWL provides better recognition performance.
ER -
English
