Speech Enhancement using Fractional Order Spectral Subtraction Method
Spectral subtraction method is proven to be one of the most efficient algorithm for the enhancement of speech. Fractional Fourier Transform (FRFT) is the generalization of the Fourier Transform. The discrete version of FRFT called as DFRFT is defined in several ways by different people. In this paper, a novel spectral subtraction method is proposed by replacing Fast Fourier Transform (FFT) with FRFT. The performance of the proposed system is evaluated in terms of Mean Squared Error(MSE) and Peak Signal to Noise Ratio (PSNR) for different values of fractional order, a and compared with the conventional techniques by using different definitions of DFRFT.