Voice Synthesis Method, Voice Synthesis Device, Medium for Storing Voice Synthesis Program

A voice synthesis device configured to generate a voice signal through connection of a phonetic piece extracted from a reference voice, comprising:

• a piece selection unit configured to select the phonetic piece sequentially;
• a pitch setting unit configured to set a pitch transition in which a fluctuation of an observed pitch of the phonetic piece is reflected based on a degree corresponding to a difference value between a reference pitch being a reference of sound generation of the reference voice and the observed pitch of the phonetic piece selected by the piece selection unit;
• and
• a voice synthesis unit configured to generate the voice signal by adjusting a pitch of the phonetic piece selected by the piece selection unit based on the pitch transition generated by the pitch setting unit.

A non-transitory computer-readable recording medium storing a voice synthesis program for generating a voice signal through connection of a phonetic piece extracted from a reference voice, the program causing a computer to function as:

• a piece selection unit configured to select the phonetic piece sequentially;
• a pitch setting unit configured to set a pitch transition in which a fluctuation of an observed pitch of the phonetic piece is reflected based on a degree corresponding to a difference value between a reference pitch being a reference of sound generation of the reference voice and the observed pitch of the phonetic piece selected by the piece selection unit;
• and
• a voice synthesis unit configured to generate the voice signal by adjusting a pitch of the phonetic piece selected by the piece selection unit based on the pitch transition generated by the pitch setting unit.