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Using previous acoustic context to improve Text-to-Speech synthesis

2020-12-07 15:00:18
Pilar Oplustil-Gallegos, Simon King

Abstract

Many speech synthesis datasets, especially those derived from audiobooks, naturally comprise sequences of utterances. Nevertheless, such data are commonly treated as individual, unordered utterances both when training a model and at inference time. This discards important prosodic phenomena above the utterance level. In this paper, we leverage the sequential nature of the data using an acoustic context encoder that produces an embedding of the previous utterance audio. This is input to the decoder in a Tacotron 2 model. The embedding is also used for a secondary task, providing additional supervision. We compare two secondary tasks: predicting the ordering of utterance pairs, and predicting the embedding of the current utterance audio. Results show that the relation between consecutive utterances is informative: our proposed model significantly improves naturalness over a Tacotron 2 baseline.

Abstract (translated)

URL

https://arxiv.org/abs/2012.03763

PDF

https://arxiv.org/pdf/2012.03763.pdf


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