Spectral noise subtraction with recursive gain curves
نویسندگان
چکیده
A well known technique for speech enhancement is spectral subtraction. This technique is attractive due to its simplicity and its low computational cost. However, spectral subtraction has the drawback of generating residual noise with a musical character, the so-called musical noise. In this paper, we propose a simple modi cation of the lter coe cient calculation in form of a recursion of the previous lter coe cient. As indicated by objective and subjective tests, the new recursive enhancement scheme substantially reduces musical noise without a noticeable impairment of the speech signal.
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Noise subtraction with parametric recursive gain curves
A well known technique for speech enhancement is spectral subtraction. This technique is attractive due to its simplicity and its low computational cost. We have proposed a simple modi cation of the lter coe cient calculation in form of a recursion of the previous lter coe cient. Because of this recursion the subtraction rule (gain curve) consists of two di erent paths, one for increasing signa...
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