GitLab

Summary:
Adds script for generating global feature statistics along with new feature statistics json for LibriSpeech RNN-T training recipe.

Pull Request resolved: https://github.com/pytorch/audio/pull/2183

Reviewed By: mthrok

Differential Revision: D33902377

Pulled By: hwangjeff

fbshipit-source-id: ec347a685ae67aefc485084aac6ed2efd653250f