• The Journal of the Acoustical Society of Korea
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• v.13 no.1E
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• pp.71-81
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• 1994

In this paper, we propose a pseudo-cepstral representation of line spectrum pair(LSP) frequencies and evaluate speech recognition performance with cepstral lift using the pseudo-cepstrum. The pseudo-cepstrum corresponding to LSP frequencies is derived by approxmating the relationship between LPC-cepstrum and LSP frequencies. Three cepstral liftering procedures are applied to the pseudo-cepstrum to improve the performance of speech recognition. They are the root-power-sums ligter, the general exponential lifter, and the bandpass lifter. Then, the liftered psedudo-cepstra are warped into a mel-frequency scale to obtain feature vectors for speech recognition. Among the three lifters, the general exponential lifter results in the best performance on speech recognition. When we use the proposed pseudo-cepstra feature vectors for recognizing noisy speech, the signal-to-noise ratio (SNR) improvement of about 5~10dB LSP is obtained.

• The Journal of the Korea Contents Association
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• v.13 no.6
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• pp.194-201
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• 2013

In serious crimes, bloody fingerprints are crucial evidence that make links between suspects and victims. There have been many studies related to bloody fingerprints for a long time. There are many comparative studies for effectiveness of Acid Fuchsin and Acid Yellow 7, but nothing about Eosin-Y in this country. Acid Fuchsin is a useful reagent that has unique red color distinguishing from light colored background. but it is useless on dark surfaces. In order to make it visible, we should use BVDA Gel lifters. On the contrary this, Acid Yellow 7 makes stronger fluorescence on a dark background. In this study, we got the conclusion that Eosin-Y is more useful than the others not only on dark background but also light background.