Denoising human speech signals using chaoslike features

A local projective noise reduction scheme, originally developed for low-dim ensional stationary deterministic chaotic signals, is successfully applied to human speech. This is possible by exploiting properties of the speech si gnal which resemble structure exhibited by deterministic dynamical systems. In high-dimensional embedding spaces, the strong inherent nonstationarity is resolved as a sequence of many different dynamical regimes of moderate c omplexity.