Title :
Improved scale-cepstral analysis in speech
Author :
Umesh, S. ; Cohen, L. ; Nelson, D.
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol., Kanpur, India
Abstract :
We present improvements over the original scale-cepstrum proposed by Umesh, Cohen, Marinovic and Nelson (see IEEE Trans. on Speech and Audio Processing, 1996). The scale-cepstrum was motivated by a desire to normalize the first-order effects of differences in vocal-tract lengths for a given vowel. Our subsequent work has shown that a more appropriate frequency-warping than the log-warping used in in the original scale-cepstrum is necessary to account for the frequency dependency of the scale-factor. Using this more appropriate frequency-warping and a modified method of computing the scale-cepstrum we have obtained improved features that provide better separability between vowels than before, and are also robust to noise
Keywords :
acoustic signal processing; cepstral analysis; feature extraction; speech processing; acoustic features; first-order effects; frequency dependency; frequency-warping; log-warping; mel-based features; modified method; noise; scale-cepstral analysis; scale-factor; speech analysis; speech processing; vocal-tract lengths; vowel; Acoustic noise; Educational institutions; Engineering profession; Equations; Fourier transforms; Frequency; Loudspeakers; Noise robustness; Signal analysis; Speech analysis;
Conference_Titel :
Acoustics, Speech and Signal Processing, 1998. Proceedings of the 1998 IEEE International Conference on
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-4428-6
DOI :
10.1109/ICASSP.1998.675345