Importance of Phase Information in Speech Enhancement

At present, the performance of multimedia technology used for processing speech and images and for mobile telecommunications is often degraded due to equipment limitations. For example, noise reduces both signal strength and quality, while channel noise leads to significant signal distortion. Hence, new techniques to deal with noise processing are an inherent part of efforts to develop multimedia technology. This study utilized speech phase information to boost the performance of speech enhancement algorithms and proved experimentally that significant improvement could be achieved by applying a modified spectral subtraction method.