Title :
Regularized estimation of cepstrum envelope from discrete frequency points
Author :
Cappe, Olivier ; Laroche, J. ; Moulines, E.
Author_Institution :
Dept. Signal, Ecole Nat. Superieure des Telecommun., Paris, France
Abstract :
This paper presents an improved method for the estimation of a continuous frequency-envelope when the value of this envelope is specified only at discrete frequencies. It is based on the Galas/Rodet (1990) approach which consists of fitting a cepstral amplitude envelope to the specified frequency points by minimizing a frequency-domain least-squares criterion. This paper introduces a regularization technique which increases the robustness of the estimation procedure. Used in combination with a warped frequency-scale, the proposed method is shown to provide an efficient model for the frequency envelope of speech signals
Keywords :
cepstral analysis; frequency estimation; frequency-domain analysis; least squares approximations; speech processing; speech synthesis; cepstral amplitude envelope; cepstrum envelope; continuous frequency envelope estimation; discrete frequency points; estimation procedure; frequency envelope; frequency-domain least-squares criterion; regularization technique; regularized estimation; robustness; speech signals; speech synthesis; warped frequency-scale; Cepstral analysis; Cepstrum; Fourier transforms; Frequency estimation; Harmonic analysis; Robustness; Signal analysis; Signal synthesis; Speech analysis; Speech synthesis;
Conference_Titel :
Applications of Signal Processing to Audio and Acoustics, 1995., IEEE ASSP Workshop on
Conference_Location :
New Paltz, NY
Print_ISBN :
0-7803-3064-1
DOI :
10.1109/ASPAA.1995.482993
