PVAE-TTS: ADAPTIVE TEXT-TO-SPEECH VIA PROGRESSIVE STYLE ADAPTATION

Adaptive text-to-speech (TTS) has attracted increasing interests for the purpose of training TTS systems without tons of high quality data. Nevertheless, existing adaptive TTS systems still show low adaptation quality for novel speakers, since it is hard to learn an extensive speaking style with limited data. To address this issue, we propose progressive variational autoencoder (PVAE) which generates data with adapting to style gradually. PVAE learns a progressively style-normalized representation, which is a key component of progressive style adaptation. We extend PVAE to PVAE-TTS, a multi-speaker adaptive TTS model which generates natural speech with high adaptation quality for novel speakers. To further improve the adaptation quality, we propose dynamic style layer normalization (DSLN) which utilizes a convolution operation. The experimental results demonstrate the superiority of PVAE-TTS in terms of both subjective and objective evaluations.