Faster high-quality speech synthesis.

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Faster high-quality speech synthesis.
« on: March 01, 2018, 10:41:47 pm »


A new kind of adversarial network allows high-quality speech synthesis to take advantage of parallel hardware obtaining a thousand-fold increase in performance. This technology is already being used in Google Assistant.

https://arxiv.org/abs/1711.10433

The recently-developed WaveNet architecture is the current state of the art in realistic speech synthesis, consistently rated as more natural sounding for many different languages than any previous system. However, because WaveNet relies on sequential generation of one audio sample at a time, it is poorly suited to today's massively parallel computers, and therefore hard to deploy in a real-time production setting. This paper introduces Probability Density Distillation, a new method for training a parallel feed-forward network from a trained WaveNet with no significant difference in quality. The resulting system is capable of generating high-fidelity speech samples at more than 20 times faster than real-time, and is deployed online by Google Assistant, including serving multiple English and Japanese voices.

 


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