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International Journal of Speech Technology
Erschienen in: International Journal of Speech Technology 3/2013

01.09.2013

Wavelet based sub-band parameters for classification of unaspirated Hindi stop consonants in initial position of CV syllables

verfasst von: R. P. Sharma, O. Farooq, I. Khan

Erschienen in: International Journal of Speech Technology | Ausgabe 3/2013

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Abstract

This paper proposes a new feature extraction technique using wavelet based sub-band parameters (WBSP) for classification of unaspirated Hindi stop consonants. The extracted acoustic parameters show marked deviation from the values reported for English and other languages, Hindi having distinguishing manner based features. Since acoustic parameters are difficult to be extracted automatically for speech recognition.
Mel Frequency Cepstral Coefficient (MFCC) based features are usually used. MFCC are based on short time Fourier transform (STFT) which assumes the speech signal to be stationary over a short period. This assumption is specifically violated in case of stop consonants.
In WBSP, from acoustic study, the features derived from CV syllables have different weighting factors with the middle segment having the maximum. The wavelet transform has been applied to splitting of signal into 8 sub-bands of different bandwidths and the variation of energy in different sub-bands is also taken into account. WBSP gives improved classification scores. The number of filters used (8) for feature extraction in WBSP is less compared to the number (24) used for MFCC. Its classification performance has been compared with four other techniques using linear classifier. Further, Principal components analysis (PCA) has also been applied to reduce dimensionality.
Vorheriger Artikel Recognizing the message and the messenger: biomimetic spectral analysis for robust speech and speaker recognition
Nächster Artikel MCRA noise estimation for KLT-VRE-based speech enhancement

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Metadaten
Titel
Wavelet based sub-band parameters for classification of unaspirated Hindi stop consonants in initial position of CV syllables
verfasst von
R. P. Sharma
O. Farooq
I. Khan
Publikationsdatum
01.09.2013
Verlag
Springer US
Erschienen in
International Journal of Speech Technology / Ausgabe 3/2013
Print ISSN: 1381-2416
Elektronische ISSN: 1572-8110
DOI
https://doi.org/10.1007/s10772-012-9185-x

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