Patent ID: 11900957
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 5:
6. A voice conversion method, the method comprising:
learning:
encoding, on the basis of:
parallel data of a sound feature value series in a conversion-source voice signal and a latent variable series in the conversion-source voice signal, and
an attribution code indicating attribution of the conversion-source voice signal, estimating a latent variable series from input of the sound feature value series and an attribution code, and

decoding further comprising reconfiguring the sound feature value series from input of the latent variable series and the attribution code,
wherein the learning includes the encoding and decoding to maximize a value of an objective function,
wherein the objective function being represented using:
attribution code similarity of the sound feature value series reconfigured by the decoding from input of an error between the sound feature value series reconfigured by the decoding and the sound feature value series in the conversion-source voice signal in the parallel data,
a distance between the latent variable series estimated by the encoding and the latent variable series in the conversion-source voice signal in the parallel data, and
any attribution code, the attribution code similarity being similarity to the any attribution code identified by an attribution identifier.