SpeechLoop

One can judge from experiment, or one can blindly accept authority.

Robert A. Heinlein

A "keep it simple" collection of many speech recognition engines focusing on inference only. We take the best and most well-known models, pick sensible defaults (if they don't already exist) and make them really easy to evaluate & use.

Quick Links

Overview

We've standardized some common ASR engines to make analysis of which speech recognition engine is the best for a given speech dataset. Selecting and discovering what ASR works well for a given scenario can be complicated since it depends on many factors. The standardization this repo provides should make it easier for researchers who want to compare their SoTA models to production systems, both cloud and local, or for people curious and are just getting started looking at speech recognition.

Features

Simple API to run an ASR, with CLI for quick testing with live mic or your chosen WAVs
Supports a growing number of local and cloud ASRs
Simple modular python interface using Pandas dataframes - easy to extend and change.
Evaluation is driven by a line in the dataframe - want to evaluate more speech wavs? Add more lines.
Automatic WER calculation with punctuation removal, word corrections (e.g. 1 -> one)
Simple CSV output

Example

Quicklyiest Quick start

# make a virtualenv
python3 -m venv ~/venv/speechloop

# activate virtualenv
source ~/venv/speechloop/bin/activate

pip install speechloop
# cd to a directory with WAVs or use the examples!

speechloop

Want to use a specific ASR in your own script? No problem

from speechloop.asr.vosk import Vosk

raw_audio_file = open("path/to/your/mono_16k.wav", "rb").read()

vs = Vosk()
print(f"{vs.longname} -> {vs.execute_with_audio(raw_audio_file)}")

ASRs

Using all as wanted_asr parameter to main.py will attempt to start all ASRs for testing.

Short Code	Model	Licence	Type
✅ sp	CMU Sphinx	Open Source	Offline - docker
✅ vs	Alphacep Vosk	Open Source	Offline - docker
✅ cq	Coqui	Open Source	Offline - docker
❌ sb	Speech Brain	Open Source	Offline - docker
❌ nm	Nvidia NeMo	Open Source	Offline - docker
✅ gg	Google	Proprietary	API set env:`GOOGLE_APPLICATION_CREDENTIALS`
✅ az	Microsoft Azure	Proprietary	API set env:`AZURE_KEY`
✅ aw	Amazon	Proprietary	API set env:`AWS_ACCESS_KEY_ID` +`AWS_SECRET_ACCESS_KEY` or aws configure

** In general, if there's a simple python API (that requires no extra compilation steps or heavy libs) then it'll be included as-is otherwise we build a docker container

Structure

The structure loosely follows the project:

├── docs
├── LICENSE
├── notebooks
│         └── eda.ipynb
├── README.md
├── requirements.txt
├── tests
└── speechloop
    ├── data
    │   ├── simple_test
    │   └── ...
    ├── output
    ├── asr.py
    ├── speechloop.py
    ├── audio.py
    ├── text.py
    └── validate.py

Requirements

Python3.6+
x86_64
Recommend having approximately X GB storage space for each model

Developer - 2 Step Install

For developers - installation should be straight-forward and only take a number of minutes on most systems.

Step 1 - Dev Install SpeechLoop

git clone https://github.com/robmsmt/SpeechLoop && cd SpeechLoop
python3 -m venv venv/py3
source venv/py3/bin/activate
pip install -r requirements-dev.txt

Step 2 - Install Docker

Skip this step if it's already installed.

curl -fsSL https://get.docker.com -o get-docker.sh
sh get-docker.sh

Note it's important here that docker can run without root access. After this step has completed, you should check that you can type: docker images and the list should be empty. If it requires that you type: sudo docker images then you should follow this step Another good test is running: docker run hello-world

RUNNING AS A DEVELOPER

cd speechloop
python main.py --input_csv='data/simple_test/simple_test.csv' --wanted_asr=vs,sp,cq

TESTS

Run all tests with: python3 -m unittest discover .