JVNV: A Corpus of Japanese Emotional Speech with Verbal Content and Nonverbal Expressions

JVNV is a Japanese emotional speech corpus with verbal content and nonverbal vocalizations whose scripts are generated by a large-scale language model.Existing emotional speech corpora lack not only proper emotional scripts but also nonverbal vocalizations (NVs) that are essential expressions in spoken language to express emotions.We propose an automatic script generation method to produce emotional scripts by providing seed words with sentiment polarity and phrases of nonverbal vocalizations to ChatGPT using prompt engineering.We select 514 scripts with balanced phoneme coverage from the generated candidate scripts with the assistance of emotion confidence scores and language fluency scores.JVNV has better phoneme coverage and emotion recognizability than previous Japanese emotional speech corpora.To our best knowledge, JVNV is the first speech corpus that generates scripts automatically using large language models.