Electronic apparatus, terminal apparatus and controlling method thereof

A controlling method of an electronic apparatus, the method comprising:

• receiving a text input;
• identifying a first acoustic feature from the text input using a prosody module configured to extract an acoustic feature, wherein the first acoustic feature corresponds to a first sampling rate;
• generating a modified acoustic feature having a modified sampling rate different from the first sampling rate by performing approximation on the identified first acoustic feature based on a pre-set acoustic feature;
• and
• generating a plurality of vocoder learning models by training a vocoder module configured to generate a speech waveform based on the first acoustic feature and the modified acoustic feature.

A system for generating speech waveforms, the system comprising:

• an electronic device comprising an input/output (I/O) interface and a first processor, wherein the first processor includes a first prosody module configured to extract acoustic features and a first vocoder module configured to generate the speech waveforms,
• wherein the first processor is configured to:
• receive a first text input using the I/O interface;
• determine a first acoustic feature from the first text input using the first prosody module, wherein the first acoustic feature corresponds to a first sampling rate;
• generate a modified acoustic feature corresponding to a modified sampling rate different from the first sampling rate, by performing approximation of the identified first acoustic feature based on a pre-set acoustic feature;
• and
• generate a plurality of vocoder learning models by training the first vocoder module based on the first acoustic feature and the modified acoustic feature;
• and
• transmit the plurality of vocoder learning models to a terminal device.