Bron Arkady, Current research and help. Originally Ephraim et al. An implementation of this base system is open for exploration. This original research considered expectation based spectral amplitude subtraction techniques for speech enhancing. It did not work with physical models of vocal systems, and has a dynamic overlapped block processing style.
Work now lies in modeling speech absence estimates.
Only speech was a non stationary signal. Work now lies in finding methods for accurately modeling non stationary noise. Soon et al. These concepts were incorporated to form a more modern enhancement system. The following are examples of this package and it's internals at work.