@inproceedings{Degottex2014,
title = {COVAREP - A collaborative voice analysis repository for speech technologies},
author = {Gilles Degottex and John Kane and Thomas Drugman and Tuomo Raitio and Stefan Scherer},
year = {2014},
date = {2014-12-01},
booktitle = {Proc. ICASSP 2014},
keywords = {glottal source, sinusoidal modeling, spectral envelope, Speech processing, toolkit, voice quality}
}

@inproceedings{Airaksinen2014,
title = {Parameterization of the glottal source with the phase plane plot},
author = {Manu Airaksinen and Paavo Alku},
year = {2014},
date = {2014-09-14},
booktitle = {Proc Interspeech 2014},
pages = {96-99},
publisher = {ISCA},
abstract = {Parameterization of the glottal flow is a process where the glottal flow is represented in terms of a few numerical values. This study proposes a novel parameterization technique called the phase plane symmetry (PPS) parameter that utilizes the symmetrical properties of the phase plane plot. Phase plane is a way to graphically visualize the glottal source in a 2-dimensional space spanned by two amplitude-domain axes. A correctly normalized phase plane plot has also close ties to the normalized amplitude quotient (NAQ) parameter, and it is shown that the inverse NAQ value is represented as a single point in the phase plane plot. The experiments conducted in this study support that PPS is powerful in discriminating between various phonation types and within the same range of robustness as the NAQ parameter.},
keywords = {glottal source, phase plane}
}

@inproceedings{Airaksinen2014b,
title = {Automatic estimation of the lip radiation effect in glottal inverse filtering},
author = {Manu Airaksinen and Tom Bäckström and Paavo Alku},
year = {2014},
date = {2014-09-14},
booktitle = {Proc Interspeech 2014},
pages = {398-402},
abstract = {In the analysis of speech production, glottal inverse filtering has proved to be an effective yet non-invasive method for obtaining information about the voice source. One of the main challenges of the existing methods is blind estimation of the contribution of the lip radiation, which must often be manually determined. To obtain a fully automatic system, we propose an automatic method for determining the lip radiation parameter. Our method is based on a physically-motivated quality criteria for the glottal flow, which can be approximated by minimization of the norm-1. Experiments show that the parameters obtained by the automatic method are mostly within the 95% confidence intervals of the mean values obtained by manual tuning by experts.},
keywords = {glottal inverse filtering, glottal source}
}