ParaTTS: Learning Linguistic and Prosodic Cross-sentence Information in Paragraph-based TTS

• URL: http://arxiv.org/abs/2209.06484v1
• Date: Wed, 14 Sep 2022 08:34:16 GMT
• Title: ParaTTS: Learning Linguistic and Prosodic Cross-sentence Information in Paragraph-based TTS
• Authors: Liumeng Xue, Frank K. Soong, Shaofei Zhang, Lei Xie
• Abstract summary: We propose to model linguistic and prosodic information by considering cross-sentence, embedded structure in training. We trained on a storytelling audio-book corpus (4.08 hours), recorded by a female Mandarin Chinese speaker. The proposed TTS model demonstrates that it can produce rather natural and good-quality speech paragraph-wise.
• Score: 19.988974534582205
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Recent advancements in neural end-to-end TTS models have shown high-quality, natural synthesized speech in a conventional sentence-based TTS. However, it is still challenging to reproduce similar high quality when a whole paragraph is considered in TTS, where a large amount of contextual information needs to be considered in building a paragraph-based TTS model. To alleviate the difficulty in training, we propose to model linguistic and prosodic information by considering cross-sentence, embedded structure in training. Three sub-modules, including linguistics-aware, prosody-aware and sentence-position networks, are trained together with a modified Tacotron2. Specifically, to learn the information embedded in a paragraph and the relations among the corresponding component sentences, we utilize linguistics-aware and prosody-aware networks. The information in a paragraph is captured by encoders and the inter-sentence information in a paragraph is learned with multi-head attention mechanisms. The relative sentence position in a paragraph is explicitly exploited by a sentence-position network. Trained on a storytelling audio-book corpus (4.08 hours), recorded by a female Mandarin Chinese speaker, the proposed TTS model demonstrates that it can produce rather natural and good-quality speech paragraph-wise. The cross-sentence contextual information, such as break and prosodic variations between consecutive sentences, can be better predicted and rendered than the sentence-based model. Tested on paragraph texts, of which the lengths are similar to, longer than, or much longer than the typical paragraph length of the training data, the TTS speech produced by the new model is consistently preferred over the sentence-based model in subjective tests and confirmed in objective measures.

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