BEAMFORMERS

This library implements some of the most well known beamformers for source separation and speech enhancement. The beamformers are easy to use and implemented in simplest way possible in case someone wants to understand how to implemented them on their own. The idea of this library is to provide a simple way of applying beamforming for source separation and/or speech enhancement directly to multi-channel microphone recordings store as numpy arrays.

For most of the beamformers the only information needed is the microphone recordings of the mixture (or the noisy speech) and a segment of recordings of the noise alone. No need to provide the steering vector as it is automatically extracted from the data (see docs for more information on how this works). If available, recordings of the target speech alone will help the estimate of the steering vector providing a cleaner output.

Now with also mask-based beamformers! Some parts of the code have been borrowed from here. Please refer to the repo and to the paper for more information.

Install

Simply

pip install beamformers

or

git clone https://github.com/Enny1991/beamformers
cd beamformers
python setup.py install

Simple to use

import soundfile as sf
from beamformers import beamformers

# mix: ndarray (n_mics, time) with the noisy signal recording
# nn: ndarray (n_mics, time) with the noise recording

mix, _ = sf.read('../wavs/mix.wav')
# soundfile loads the file is as (time, n_mics) so I need to transpose it
mix = mix.T

# NOISE
nn, _ = sf.read('../wavs/nn.wav')
# soundfile loads the file is as (time, n_mics) so I need to transpose it
nn = nn.T

out_mvdr = beamformers.MVDR(mix, nn)

Extra

There is the possibility to use BeamformIt but you will need to manually compile it. Follow the instructions in their repo. Once installed you can use it in the following way

import soundfile as sf

from beamformers import beamformers

mix, _ = sf.read('../wavs/mix.wav')
mix = mix.T

basedir = '/some/path/BeamformIt'
out_mvdr = beamformers.BeamformIt(mix, fs=8000, basedir=basedir)