INTERSPEECH 2011 12th Annual Conference of the International Speech Communication Association Florence, Italy August 27-31. 2011

Kernel PCA for Speech Enhancement

Christina Leitner, Franz Pernkopf, Gernot Kubin

Technische Universität Graz, Austria

In this paper, we apply kernel principal component analysis (kPCA), which has been successfully used for image denoising, to speech enhancement. In contrast to other enhancement methods which are based on the magnitude spectrum, we rather apply kPCA to complex spectral data. This is facilitated by Gaussian kernels. In the experiments, we show good noise reduction with few artifacts for noise corrupted speech at different SNR levels using additive white Gaussian noise. We compared kPCA with linear PCA and spectral subtraction and evaluated all algorithms with perceptually motivated quality measures.

Full Paper

Bibliographic reference.  Leitner, Christina / Pernkopf, Franz / Kubin, Gernot (2011): "Kernel PCA for speech enhancement", In INTERSPEECH-2011, 1221-1224.