Voice synthesis method, voice synthesis apparatus, and recording medium

A voice synthesis apparatus comprising:

• a memory;
• and
• at least one processor,
• wherein the at least one processor, by execution of instructions stored in the memory, is configured to:
• designate a target feature of a voice to be synthesized;
• specify harmonic frequencies for a plurality of respective harmonic components of the voice and an amplitude spectrum envelope of the voice;
• specify a harmonic amplitude distribution for each of the plurality of respective harmonic components based on (i) the target feature, (ii) the amplitude spectrum envelope, and (iii) the harmonic frequency specified for the respective harmonic component, the harmonic amplitude distribution representing a distribution of amplitudes in a unit band with a peak amplitude corresponding to the respective harmonic component;
• and
• generate a frequency spectrum of the voice with the target feature based on harmonic amplitude distributions specified for each of the plurality of respective harmonic components and the amplitude spectrum envelope.

A non-transitory computer-readable recording medium having stored therein a computer program for causing a computer to perform a voice synthesis method of:

• designating a target feature of a voice to be synthesized;
• specifying harmonic frequencies for a plurality of respective harmonic components of the voice and an amplitude spectrum envelope of the voice;
• specifying a harmonic amplitude distribution of each of the plurality of respective harmonic components based on (i) the target feature, (ii) the amplitude spectrum envelope, and (iii) the harmonic frequency specified for the respective harmonic component, the harmonic amplitude distribution representing a distribution of amplitudes in a unit band with a peak amplitude corresponding to the respective harmonic component;
• and
• generating a frequency spectrum of the voice with the target feature based on harmonic amplitude distributions specified for each of the plurality of respective harmonic components and the amplitude spectrum envelope.