This thesis aims to investigate the phase estimation problem in speech enhancement and dereverberation.

Noise and reverberation widely exist in daily lives, and have detrimental effects on the quality and

In our initial speech dereverberation experiments, we found an issue in the perceptual evaluation

achieved results similar to the estimated phase in terms of the quality of reconstructed speech.

intelligibility of speech for human listeners. Therefore, speech enhancement and dereverberation

of speech quality (PESQ) measure. When measuring reverberant speech, the cross-correlation-based

We also conducted a listening test to measure the perceptual quality of the produced speech, and

the results showed that our proposed WMP loss function is slightly preferred in terms of speech

this loss function led to an increase in speech quality. We then proposed a non-iterative phase

reconstruction approach and an iterative phase reconstruction approach to reconstruct the phase