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Kennedy, "Language identification using shifted delta cepstra," in Proceedings of the 45th Midwest Symposium on Circuits and Systems, vol.

This algorithm extracts and concatenates the two kinds of feature vectors (long-term temporal cepstra and harmonic structure information), which form the 26-dimensional feature vectors by using FFT, DCT, and IDCT in sequence [18].

Voice activity detection in noisy environments based on double-combined Fourier transform and line fitting

Then, the harmonic structure information [q.sub.t](i) is obtained by lifting out the lower and higher cepstra because the medium cepstra capture the harmonic structure Information:

A hierarchical framework approach for voice activity detection and speech enhancement

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