Forced alignment based on speech pauses using an RNN

This repository contains the code for my IP8 project at FHNW. I wrote a paper including a working implementation of the pipeline for my master thesis here.

Getting started

The code was written for Python 3.6.6 using Anaconda 4.5.8. The project documentation is available as IPython Notebooks at https://ip8.tiefenauer.info. The notebooks provide an interactive way to illustrate the documentation with given or own examples. To run the notebooks on your local machine you must perform some setup work.

Dependencies

• This application uses Pydub which means you will need libav or ffmpeg on your PATH. See the Pydub Repository for further instructions.
• Visual C++ build tools to work with webrtcvad (google it for download link): must be installed before installing the python requirements (see below)!

Installation

1. Clone the repository: git clone git@github.com:tiefenauer/forced-alignment.git
2. Install Python requirements: pip install -r requirements.txt
3. Install TensorFlow: TF is not included in requirements.txt because you can choose between the tensorflow (no GPU acceleration) and tensorflow-gpu (with GPU-acceleration). If your computer does not have a CUDA-supported GPU (like mine does) you will install the former, else the latter. Installing tensorflow-gpu on a computer without GPU does not work (at least I did not get it to work).
4. Run Jupyter Notebook from the directory where you cloned the code into: jupyter notebook

Jupyter Notebook extensions

The following extensions for Jupyter Notebook were used:

• jupyter_contrib_nbextensions: A collection of useful extensions (like a TOC) that also includes a manager that allows enabling/disabling individual extensiosn from the web interface
• cite2c: For managing citations (works with Zotero)

Project anatomy

Most of the code and the documentation is contained in the src folder.

Folder	Description
/	root folder containing some Bash scripts to train the RNN
assets	binary data (images, audio, etc...) used for the Jupyter Notebooks
demos	HTML-files to visualize the result of the alignment pipeline.
src	scripts and Python source files containing all application logic. Also, the documentation is stored here
test	some unit tests
tmp	temporary folder, e.g. needed for the VAD stage. No persistent files should be stored here as this folder might be deleted at any time by application logic!