Abstract: A method of providing a service for a conversation with a virtual character replicating a deceased person is provided. The method of the present disclosure includes predicting a response message of a virtual character replicating a deceased person in response to a message input by a user, generating a speech corresponding to an oral utterance of the response message on the basis of speech data of the deceased person and the response message, and generating a final video of the virtual character uttering the response message on the basis of a driving video guiding the movement of the virtual character and the speech.

Abstract: Provided is a technology for increasing accuracy of position estimation by estimating a position of a signal source based on an error due to altitudes of a sensor and a signal source and an error due to a pitch of an aircraft as well as an error due to curvature of the earth. At this time, a position estimation method may include receiving measurement data from a plurality of sensors, estimating first position data of the signal source based on the measurement data, identifying an altitude error of the first position data, and estimating second position data that is data obtained by correcting the first position data based on the altitude error.

Abstract: This application relates to a method of synthesizing a speech of which a speed and a pitch are changed. In one aspect, the method includes a spectrogram may be generated by performing a short-time Fourier transformation on a first speech signal based on a first hop length and a first window length, and speech signals of sections having a second window length at the interval of a second hop length from the spectrogram. A ratio between the first hop length and the second hop length may be set to be equal to the value of a playback rate and a ratio between the first window length and the second window length may be set to be equal to the value of a pitch change rate, thereby generating a second speech signal of which the speed and the pitch are changed.

Abstract: A method of synthesizing speeches by scoring the speeches is proposed. The method may include generating a spectrogram based on utterer information and a text and generating a plurality of sub-speeches corresponding to the spectrogram. The method may also include selecting one of the plurality of sub-speeches and generating a final speech by using the selected sub-speech.

Abstract: A computer-implemented method of generating speech training data is proposed. The method may include generating, at a processor, a recording script corresponding to particular text. The method may also include generating, at the processor, recorded data by performing recording by a speaker based on the recording script. The method may further include labeling, at the processor, the recorded data. Various embodiments can generate a large amount of speech training data for training an artificial neural network model while minimizing a worker's inconvenience and time consumption.

Abstract: This application relates to a speech synthesis system. In one aspect, the system includes an encoder configured to generate a speaker embedding vector corresponding to a verbal speech based on a first speech signal corresponding to a verbal utterance. The system may also include a synthesizer configured to perform at least once the cycle including generating a plurality of spectrograms corresponding to verbal utterance of the sequence of the text, based on the speaker embedding vector and a sequence of a text written in a particular natural language and selecting a first spectrogram from among the spectrograms, to output the first spectrogram. The system may further include a vocoder configured to generate a second speech signal corresponding to the sequence of the text based on the first spectrogram.

Abstract: This application relates to a method of synthesizing a speech of which a speed and a pitch are changed. In one aspect, the method includes a spectrogram may be generated by performing a short-time Fourier transformation on a first speech signal based on a first hop length and a first window length, and speech signals of sections having a second window length at the interval of a second hop length from the spectrogram. A ratio between the first hop length and the second hop length may be set to be equal to the value of a playback rate and a ratio between the first window length and the second window length may be set to be equal to the value of a pitch change rate, thereby generating a second speech signal of which the speed and the pitch are changed.