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KMID : 0917520030100020057
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Journal of Speech Sciences
2003 Volume.10 No. 2 p.57 ~ p.64
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On a Reduction of Computation Time of FFT Cepstrum
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Jo Wang-Rae
Kim Jong-Kuk
Bae Myung-Jin
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Abstract
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The cepstrum coefficients are the most popular feature for speech recognition or speaker recognition. The cepstrum coefficients are also used for speech synthesis and speech coding but has major drawback of long processing time. In this paper, we proposed a new method that can reduce the processing time of FFT cepstrum analysis. We use the normal ordered inputs for FFT function and the bit-reversed inputs for IFFT function. Therefore we can omit the bit-reversing process and reduce the processing time of FFT ceptrum analysis.
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KEYWORD
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Homomorphic Deconvolution, Characteristic System, Cepstrum Analysis, Fourier Transform, Bit-reversing
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