Multi-band bark scale spectral over-subtraction for colored noise reduction
Radu Mihail Udrea, Silviu Ciochină, Dragoş Nicolae Vizireanu · 2006
We propose an improved spectral subtraction method for reducing acoustic noise added to speech in colored noise environments like helicopter cockpit or car engine. This implementation uses over-subtraction method for spectral subtraction. The noise signal does not affect the speech signal uniformly over the whole spectrum. A nonlinear multi-band Bark scale frequency spacing approach was proposed to reduce colored noise. Simulations showed a better quality in terms of Itakura Saito distance and perceptual evaluation of quality for the enhanced speech.