PURPOSE: A voice naturalness grade evaluation of voice based on a plurality of human testers is provided to obtain voice naturalness grade through a specific firing grade model based on plurality of human test. CONSTITUTION: A system receives human tester generated speech utterances(320). The system generates a specific speech scoring model about the acquired speech utterances(330). The system obtains a speech natural property score about represented speech utterance through the application of the specific grade model(340).
RATING SPEECH NATURALNESS OF SPEECH UTTERANCES BASED ON A PLURALITY OF HUMAN TESTERS