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Zero-Phase Impulsive Noise Suppression with Iterative Phase Reconstruction

This paper proposes a zero-phase impulsive noise suppression method with an iterative phase reconstruction. A zero-phase signal is obtained as IFFT of FFT spectral amplitude, and the impulsive noise suppression is achieved on the zero-phase domain. So, the zero-phase impulsive noise suppression is a process of the FFT spectral amplitude, and the spectral phase is unprocessed. To improve the noise suppression capability, we introduce an iterative phase reconstruction method to the zero-phase impulsive noise suppressor. The iterative phase reconstruction generates spectral phase with no contradiction on FFT overlap-add method. Simulation results showed that the introduced iterative phase reconstruction improves PESQ value in comparison to the conventional zero-phase method.