Speech Synthesis: FastPitch 1.1 Model Card

Model overview

FastPitch is a mel-spectrogram generator, designed to be used as the first part of a neural text-to-speech system in
conjunction with a neural vocoder.

Model architecture

FastPitch is a fully-parallel text-to-speech model based on FastSpeech, conditioned on fundamental frequency contours.
The model predicts pitch contours during inference. By altering these predictions, the generated speech can be more
expressive, better match the semantic of the utterance, and in the end more engaging to the listener.
FastPitch is based on a fully-parallel Transformer architecture, with much higher real-time factor than Tacotron2
for mel-spectrogram synthesis of a typical utterance.

Training

Dataset

This model is trained on a proprietary dataset sampled at 44100Hz, and can be used to generate English
voices with an American accent. This model supports 1 male voice and 1 female voice.

How to use this model

FastPitch is intended to be used as the first part of a two stage speech synthesis pipeline. FastPitch takes text
and produces a mel spectrogram. The second stage takes the generated mel spectrogram and returns audio.

Input

English text strings

Output

Mel spectrogram of shape (batch x mel_channels x time)

References

FastPitch paper: https://arxiv.org/abs/2006.06873

License

By downloading and using the models and resources packaged with Riva Conversational AI, you would be accepting the terms of the Riva license

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