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

Claim 6:
7. The voice conversion method of claim 6, the method further comprising:
estimating a latent variable series from input sound feature value series in a conversion-source voice signal and an attribution code indicating attribution of the conversion-source voice signal, wherein the estimating estimates the latent variable series from input of a sound feature value series and an attribution code; and
estimating, by the decoding, a sound feature value series of a target voice signal from the estimated latent variable series and the input attribution code indicating attribution of the target voice signal by using a decoding for reconfiguring the sound feature value series from input of the latent variable series and the attribution code, the encoding and decoding being previously learned to maximize a value of an objective function, 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, the objective function being represented using:
attribution code similarity of a 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.