25-08-2017, 09:32 PM
The method of transforming the source speakerâ„¢s speech to that of the target speaker is usually referred as Voice Morphing or voice transformation or voice conversion. Using the linear transformations estimated from time-aligned parallel training data, it transforms the spectral envelope of the potential speaker in tone with the target speaker. As the image morphing is analogous in nature, i.e. the source face smoothly changing its shape and texture to the target face, speech morphing also should smoothly change the source voice into another, keeping the shared characteristics of the starting and ending signals. The pitch and the envelope information are two factors that coincide in a speech signal, which needs to be separated. The method of cepstral analysis is usually employed to extract the same.