Expanded VAD Guided Subdivision of Cardiopulmonary Sounds

Expanded VAD Guided Subdivision of Cardiopulmonary Sounds

Contenido principal del artículo

Julio Alejandro Valdez Gonzalez
Pedro Mayorga Ortiz
Christopher Druzgalski
Vesna Zeljkovic
Gilberto Chavez
Monceni Perez

Resumen

Cardiopulmonary auscultation is a diagnostic procedure that has
a challenging task since the components of heart rate and lung
sounds overlap. There were many approaches to quantify the
characteristics of these signals, and one of the newest is the voice
activity detection (VAD) and the Gaussian Mixture Models
(GMM). Considering the lung and heart sounds as acoustic events,
this paper proposes a novel assessment methodology of these
diagnostic indicators. Here, VAD-GMM was applied to detect and
extract the main events in lung sound and heart sounds. VAD-
GMM results were compared with other VAD methodology based
on statistical approach, and it was found that VAD-GMM give
more definite results. Since Mel Frequency Cepstral coefficients
(MFCC) and Quartiles feature vectors, were already successful in
pattern recognition, VAD-GMM was carried out using this kind of
acoustic vectors. Therefore, this method could add in a transition
from qualitative traditional auscultation to quantitative
assessment and assisted computerized diagnosis by identifying
abnormal acoustic indicators. Diagnosis by computerized
detection promises to be a more efficient method than traditional
methods, which are limited by the auditory capability and
experience of a medical professional.

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Detalles del artículo

Biografía del autor/a (VER)

Julio Alejandro Valdez Gonzalez, Instituto Tecnologico de Mexicali

Departamento de Electrica-Electronica, Docente de Asignatura

Pedro Mayorga Ortiz, Instituto Tecnologico de Mexicali

Departamento de Electrica-Electronica, Docente de Tiemo Completo

Christopher Druzgalski, California State University, Long Beach

Professor in the Electrical Engineering department 

Vesna Zeljkovic, The Lincoln University

PROFESSOR, DEPARTMENT OF MATHEMATICAL SCIENCES & DEPARTMENT OF CHEMISTRY & PHYSICS

Gilberto Chavez, Instituto Tecnologico de Mexicali

Departamento de Electrica-Electronica

Monceni Perez, Univerisdad Autónoma de Baja California

Facultad de ingenieria UABC, Docente de Tiempo Completo

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