Techniques for Crosslingual Voice Conversion

The cross lingual voice conversion problem refers to the replacement of a speaker´s timbre or vocal identity in a recorded sentence, assuming that the source speaker and target speaker use different languages. This problem differs from typical voice conversion in the sense that the mapping of acoustical features cannot depend on time-aligned recordings of source and target speakers uttering the same sentences. This paper presents an overview of a general cross lingual voice conversion system and discusses the most important techniques used in each step of the conversion process.