Abstract
AbstractThe quality of synthesized speech in the speech analysis‐synthesis system based on the mel‐cepstrum method is described. Mel‐cepstrum is defined as the Fourier coefficients of the log spectrum on a nonlinear frequency scale approximating the mel scale. The true mel‐log spectral envelope is estimated in this system by an improved cepstral method in the analysis part and a mel‐log spectrum approximating filter is used in the synthesis part. The preference score by pair comparison tests is used for subjective evaluation and spectral distortion on a nonlinear frequency scale is used for an objective evaluation. Using this system, 1.7 kbit/s, high‐quality synthesized speech is obtained.
Published Version
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