Method for synthesized speech generation using emotion information correction and apparatus

An apparatus for generating synthesized speech, the apparatus comprising:

• an input unit receiving text and a first emotion information vector configured for the text;
• an output unit outputting synthesized speech;
• and
• a processor functionally connected to the input unit and the output unit,
• wherein the processor is configured to:
• generate first synthesized speech by using the text and a first emotion information vector configured for the text;
• extract a second emotion information vector included in the first synthesized speech;
• determine whether correction of the second emotion information vector is needed by comparing a loss value calculated by using the first emotion information vector and the second emotion information vector with a preconfigured threshold;
• based on the loss value calculated by using the first emotion information vector and the second emotion information vector being less than the preconfigured threshold, output the first synthesized speech;
• and
• based on the loss value calculated by using the first emotion information vector and the second emotion information vector exceeding the preconfigured threshold, generate a third emotion information vector by correcting the second emotion information vector based on the first emotion information vector, generate second synthesized speech by using the third emotion information vector, and output the second synthesized speech,
• wherein a loss value calculated by using the first emotion information vector and an emotion information vector included in the second synthesized speech is less than the preconfigured threshold, and the synthesized speech is the second synthesized speech.