Transmutative voice conversion
Seyed Hamidreza Mohammadi, Alexander B. Kain · 2013
There are two types of voice conversion (VC) systems: generative and transmutative. A generative VC system typically uses a compact parametrization of speech and maps input to output parameters directly; however, the relative low dimensionality of the underlying speech model reduces quality. On the other hand, a transmutative VC system modifies high-dimensional features of a high-fidelity speech model, leaving critical details unmodified. Two versions of transmutative VC approach are implemented and compared to a generative VC approach. The results show that the implemented transmutative VC is significantly better compared to generative VC in terms of quality. The difference between the two VC methods regarding recognition scores are insignificant.