Iterative zero phase method for white and impulse noise reduction

In this paper, we introduce an improved version of the recent noise reducer named zero phase method which can reduce white and impulse noises simultaneously without a priori information. The key idea of the proposed method is to apply the zero phase method iter-atively, whose theoretical justification is also provided in this paper. We also confirm the noise reduction performance of the proposed method by comparing with popular noise reducers, such as the spectral subtraction, the Wiener filter, and the MMSE-STSA in oracle settings.