Phase reconstruction method based on time-frequency domain harmonic structure for speech enhancement

Speech enhancement in noisy environments has been widely investigated by modifying only the amplitude spectrum of the speech signal, while the phase spectrum, which is regarded as an unimportant feature, is ignored. However, it has recently been reported that the phase spectrum plays an important role in the intelligibility and quality of speech. We propose a speech-enhancement method with phase reconstruction, which estimates inartificial phase spectrum by using the time-frequency feature called phase distortion, though a conventional phase reconstruction estimates artificial one. The objective experimental results indicate improvement in speech quality with and efficiency of the proposed method.