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Efficient Feature Extraction and De-noising Method for Chinese Speech Signals Using GGM-Based ICA

  • Yang Bin
  • Kong Wei
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3773)

Abstract

In this paper we study the ICA feature extraction method for Chinese speech signals. The generalized Gaussian model (GGM) is introduced as the p.d.f. estimator in ICA since it can provide a general method for modeling non-Gaussian statistical structure of univariate distributions. It is demonstrated that the ICA features of Chinese speech are localized in both time and frequency domain and the resulting coefficients are statistically independent and sparse. The GGM-based ICA method is also used in extracting the basis vectors directly from the noisy observation, which is an efficient method for noise reduction when priori knowledge of source data is not acquirable. The de-nosing experiments show that the proposed method is more efficient than conventional methods in the environment of additive white Gaussian noise.

Keywords

Discrete Cosine Transform Speech Signal Discrete Fourier Transform Sparse Code Shrinkage Function 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • Yang Bin
    • 1
  • Kong Wei
    • 1
  1. 1.Information Engineering CollegeShanghai Maritime UniversityShanghaiChina

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