关键词: 麦克风阵列, 后滤波, 语音增强

Abstract: This paper introduces a novel technique for estimating the signal power spectral density to be used in the transfer function of a microphone array post-filter.The technique is a modification of overestimation of noise power spectral density of the existing Zelinski post-filter and McCowan post-filter，which utilize the auto- and cross- spectral densities of the signals.Near-field compensation is taken into account.In simulations，which make use of Habets’ method of generating isotropic noise for sensor array，is used to test the proposed method.Furthermore，real noisy recordings provided freely by Carnegie Mellon University is also used.Simulation results show that the modified post-filter results in prominent improvement in terms of objective speech quality measures.

Key words: microphone array, post-filter, speech enhancement