NOISE REDUCTION AND VOICE SEPARATION ALGORITHMS APPLIED TO WOLF POPULATION COUNTING

B. Dugnol, C. Fernández, G. Galiano, J. Velasco

Abstract

We use signal and image theory based algorithms to produce estimations of the number of wolves emitting howls or barks in a given field recording as an individuals counting alternative to the traditional trace collecting methodologies. We proceed in two steps. Firstly, we clean and enhance the signal by using PDE based image processing algorithms applied to the signal spectrogram. Secondly, assuming that the wolves chorus may be modelled as an addition of nonlinear chirps, we use the quadratic energy distribution corresponding to the Chirplet Transform of the signal to produce estimates of the corresponding instantaneous frequencies, chirprates and amplitudes at each instant of the recording. We finally establish suitable criteria to decide how such estimates are connected in time.

Download


Paper Citation


in Harvard Style

Dugnol B., Fernández C., Galiano G. and Velasco J. (2008). NOISE REDUCTION AND VOICE SEPARATION ALGORITHMS APPLIED TO WOLF POPULATION COUNTING . In Proceedings of the First International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2008) ISBN 978-989-8111-18-0, pages 77-84. DOI: 10.5220/0001057000770084


in Bibtex Style

@conference{biosignals08,
author={B. Dugnol and C. Fernández and G. Galiano and J. Velasco},
title={NOISE REDUCTION AND VOICE SEPARATION ALGORITHMS APPLIED TO WOLF POPULATION COUNTING},
booktitle={Proceedings of the First International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2008)},
year={2008},
pages={77-84},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001057000770084},
isbn={978-989-8111-18-0},
}


in EndNote Style

TY - CONF
JO - Proceedings of the First International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2008)
TI - NOISE REDUCTION AND VOICE SEPARATION ALGORITHMS APPLIED TO WOLF POPULATION COUNTING
SN - 978-989-8111-18-0
AU - Dugnol B.
AU - Fernández C.
AU - Galiano G.
AU - Velasco J.
PY - 2008
SP - 77
EP - 84
DO - 10.5220/0001057000770084