A simple but efficient voice activity detection algorithm through Hilbert transform and dynamic threshold for speech pathologies

A simple but efficient voice activity detector based on the Hilbert transform and a dynamic threshold is presented to be used on the pre-processing of audio signals -- The algorithm to define the dynamic threshold is a modification of a convex combination found in literature -- This scheme allows the detection of prosodic and silence segments on a speech in presence of non-ideal conditions like a spectral overlapped noise -- The present work shows preliminary results over a database built with some political speech -- The tests were performed adding artificial noise to natural noises over the audio signals, and some algorithms are compared -- Results will be extrapolated to the field of adaptive filtering on monophonic signals and the analysis of speech pathologies on futures works

• Autores: Ortiz P., D.; Villa, Luisa F.; Salazar, Carlos; Quintero, O.L.; Ortiz P., D.; Villa, Luisa F.; Salazar, Carlos; Quintero, O.L.
• Fecha de publicación: 2016
• Institución: Universidad EAFIT
• Repositorio: Repositorio EAFIT
• Idioma: eng
• OAI Identifier: oai:repository.eafit.edu.co:10784/8373
• Acceso en línea: http://hdl.handle.net/10784/8373
• Palabra clave: Transformada de Hilbert; Cancelación de ruidos; Señal monofónica; PROCESAMIENTO DE SEÑALES; PROCESAMIENTO DE SEÑALES - TÉCNICAS DIGITALES; MEDICIÓN DEL RUIDO; FILTROS ADAPTIVOS; ANÁLISIS DE FOURIER; TEORÍA ESPECTRAL (MATEMÁTICAS); ANÁLISIS ESPECTRAL; PROCESOS DE GAUSS; UMBRAL AUDITIVO; Signal processing; Signal processing - Digital techniques; Noise - Measurement; Adaptive filters; Fourier analysis; Spectral theory (mathematics); Spectrum analysis; Gaussian processes; Auditory threshold; Signal processing; Signal processing - Digital techniques; Noise - Measurement; Adaptive filters; Fourier analysis; Spectral theory (mathematics); Spectrum analysis; Gaussian processes; Auditory threshold; Transformada de Hilbert; Cancelación de ruidos; Señal monofónica
• License: Acceso abierto