Función resumen perceptual para verificación de integridad en audio forense
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Keywords
función resumen, función perceptual, integridad, audio forense.
Resumen
En este artículos se propone una función que permite calcular un código resumen a partir de los parámetros de una señal de voz. Esta función está basada en el ordenamiento de los coeficientes espectrales en un proceso de imitación entre el espectro de la señal de voz y el espectro de una señal de ruido gaussiano generada localmente. El método de función resumen está orientado a la verificación de integridad forense en señales de voz, con un enfoque perceptual, que implica que la función resumen no cambia si la señal sufre modificaciones que no alteran el contenido (como re-cuantización), pero que si cambia ante modificaciones como recorte y adición de ruido. Se realizaron diversas pruebas para verificar el enfoque perceptual del método resumen propuesto y se compararon los resultados frente a modificaciones utilizando métodos tradicionales.
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Referencias
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