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Wavelet cepstral coefficients for isolated speech recognition

Adam, Tarmizi and Salam, Muhammad and Gunawan, Teddy Surya (2012) Wavelet cepstral coefficients for isolated speech recognition. In: International Conference on Interactive Digital Media, 3-4 December 2012, Bayview Hotel, Langkawi. (In Press)

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Abstract

The study proposes an improved feature extraction method that is called Wavelet Cepstral Coefficients (WCC). In traditional cepstral analysis, the cepstrums are calculated with the use of the Discrete Fourier Transform (DFT). Owing to the fact that the DFT calculation assumes signal stationary between frames which in practice is not quite true, the WCC replaces the DFT block in the traditional cepstrum calculation with the Discrete Wavelet Transform (DWT) hence producing the WCC. To evaluate the proposed WCC, speech recognition task of recognizing the 26 English alphabets were conducted. Comparison with the traditional Mel-Frequency Cepstral Coefficients (MFCC) are done to further analyze the effectiveness of the WCCs. It is found that the WCCs showed some comparable results when compared to the MFCCs considering the WCCs small vector dimension when compared to the MFCCs. The best recognition was found from WCCs at level 5 of the DWT decomposition with a small difference of 1.19% and 3.21% when compared to the MFCCs for speaker independent and speaker dependent tasks respectively.

Item Type: Conference or Workshop Item (Full Paper)
Additional Information: 5588/27203
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Kulliyyahs/Centres/Divisions/Institutes: Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Depositing User: Dr Teddy Surya Gunawan
Date Deposited: 04 Jan 2013 14:54
Last Modified: 04 Jan 2013 14:54
URI: http://irep.iium.edu.my/id/eprint/27203

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