4th International Conference on Spoken Language Processing

Philadelphia, PA, USA
October 3-6, 1996

CELP Coding System Based on Mel-Generalized Cepstral Analysis

Kazuhito Koishida (1), Keiichi Tokuda (2), Takao Kobayashi (1), Satoshi Imai (1)

(1) Precision and Intelligence Laboratory, Tokyo Institute of Technology, Yokohama, Japan
(2) Dept. of Intelligence and Computer Science, Nagoya Institute of Technology, Nagoya, Japan

This paper presents a CELP speech coding system based on mel-generalized cepstral analysis. In the mel-generalized cepstral analysis, we can vary the model spectrum continuously from AR to cepstral modeling by changing the value of a parameter y and we can choose an appropriate model spectrum. Furthermore, the spectrum represented by mel-generalized cepstrum has frequency resolution similar to that of human ear. Since the perceptual weighting and postfiltering are carried out through the mel-generalized cepstrum, we expect the perceptual performance of the proposed coder to be improved. The subjective performance test indicates that the quality of the proposed CELP coder is about 2 dB higher than that of the conventional one.

Full Paper

Bibliographic reference.  Koishida, Kazuhito / Tokuda, Keiichi / Kobayashi, Takao / Imai, Satoshi (1996): "CELP coding system based on mel-generalized cepstral analysis", In ICSLP-1996, 318-321.