Voice processing apparatus

A voice processing method comprising the steps of:

• adjusting, in the time domain, a fundamental frequency of a first voice signal corresponding to a voice having target voice characteristics to a fundamental frequency of a second voice signal corresponding to a voice having initial voice characteristics different from the target voice characteristics;
• and
• sequentially generating a processed spectrum based on a spectrum of the first voice signal and a spectrum of the second voice signal by the steps of:
• dividing the spectrum of the first voice signal into a plurality of harmonic band components after the fundamental frequency of the first voice signal has been adjusted to the fundamental frequency of the second voice signal;
• allocating each harmonic band component obtained by dividing the spectrum of the first voice signal to each harmonic frequency associated with the fundamental frequency of the second voice signal;
• and
• adjusting an envelope and phase of each harmonic band component according to an envelope and phase of the spectrum of the second voice signal.

A machine readable non-transitory storage medium for use in a computer, the medium containing program instructions executable by the computer to:

• adjust, in the time domain, a fundamental frequency of a first voice signal corresponding to a voice having target voice characteristics to a fundamental frequency of a second voice signal corresponding to a voice having initial voice characteristics different from the target voice characteristics;
• and
• sequentially generate a processed spectrum based on a spectrum of the first voice signal and a spectrum of the second voice signal by:
• dividing the spectrum of the first voice signal into a plurality of harmonic band components after the fundamental frequency of the first voice signal has been adjusted to the fundamental frequency of the second voice signal;
• allocating each harmonic band component obtained by dividing the spectrum of the first voice signal to each harmonic frequency associated with the fundamental frequency of the second voice signal;
• and
• adjusting an envelope and phase of each harmonic band component according to an envelope and phase of the spectrum of the second voice signal.