DiffWave: A Versatile Diffusion Model for Audio SynthesisDownload PDF

Sep 28, 2020 (edited Apr 08, 2022)ICLR 2021 OralReaders: Everyone
  • Keywords: diffusion probabilistic models, audio synthesis, speech synthesis, generative models
  • Abstract: In this work, we propose DiffWave, a versatile diffusion probabilistic model for conditional and unconditional waveform generation. The model is non-autoregressive, and converts the white noise signal into structured waveform through a Markov chain with a constant number of steps at synthesis. It is efficiently trained by optimizing a variant of variational bound on the data likelihood. DiffWave produces high-fidelity audios in different waveform generation tasks, including neural vocoding conditioned on mel spectrogram, class-conditional generation, and unconditional generation. We demonstrate that DiffWave matches a strong WaveNet vocoder in terms of speech quality (MOS: 4.44 versus 4.43), while synthesizing orders of magnitude faster. In particular, it significantly outperforms autoregressive and GAN-based waveform models in the challenging unconditional generation task in terms of audio quality and sample diversity from various automatic and human evaluations.
  • One-sentence Summary: DiffWave is a versatile diffusion probabilistic model for waveform generation, which matches the state-of-the-art neural vocoder in terms of quality and can generate abundant realistic voices in time-domain without any conditional information.
  • Code Of Ethics: I acknowledge that I and all co-authors of this work have read and commit to adhering to the ICLR Code of Ethics
  • Code: [![Papers with Code](/images/pwc_icon.svg) 8 community implementations](https://paperswithcode.com/paper/?openreview=a-xFK8Ymz5J)
13 Replies