Mix and Match: An Empirical Study on Training Corpus Composition for Polyglot Text-To-Speech (TTS)

• URL: http://arxiv.org/abs/2207.01507v1
• Date: Mon, 4 Jul 2022 15:23:06 GMT
• Title: Mix and Match: An Empirical Study on Training Corpus Composition for Polyglot Text-To-Speech (TTS)
• Authors: Ziyao Zhang, Alessio Falai, Ariadna Sanchez, Orazio Angelini, Kayoko Yanagisawa
• Abstract summary: Training multilingual Neural Text-To-Speech (NTTS) models using only monolingual corpora has emerged as a popular way for building voice cloning based Polyglot NTTS systems. It is essential to understand how the composition of the training corpora affects the quality of multilingual speech synthesis.
• Score: 3.57486761615991
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Training multilingual Neural Text-To-Speech (NTTS) models using only monolingual corpora has emerged as a popular way for building voice cloning based Polyglot NTTS systems. In order to train these models, it is essential to understand how the composition of the training corpora affects the quality of multilingual speech synthesis. In this context, it is common to hear questions such as "Would including more Spanish data help my Italian synthesis, given the closeness of both languages?". Unfortunately, we found existing literature on the topic lacking in completeness in this regard. In the present work, we conduct an extensive ablation study aimed at understanding how various factors of the training corpora, such as language family affiliation, gender composition, and the number of speakers, contribute to the quality of Polyglot synthesis. Our findings include the observation that female speaker data are preferred in most scenarios, and that it is not always beneficial to have more speakers from the target language variant in the training corpus. The findings herein are informative for the process of data procurement and corpora building.

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