Acceleration of Zelinski Post-Filtering Calculation

In this paper we propose a novel fast algorithm for calculating the transfer function of the Zelinski post-filter in a microphone array. The proposed algorithm requires less memory and fewer arithmetical multiplications. We demonstrate that for the “classical” algorithm computational complexity increases quadratically as a function of the number of microphones in the array. In contrast, the computational complexity of the proposed algorithm increases linearly. This provides a considerable acceleration in the calculation of the post-filter transfer function in real-time systems.