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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

3D audio technologies : applications to sound capture, post-production and listener perception

Cengarle, Giulio 29 November 2012 (has links)
La llegada del sonido 3D está imponiendo cambios en varias etapas del flujo de trabajo, desde los sistemas de captación hasta las metodologías de postproducción y las configuraciones de altavoces. Esta tesis trata varios aspectos relacionados con el audio 3D: en la parte de captación, presentamos un estudio sobre las características de los micrófonos tetraédricos y una solución para obtener las componentes Ambisonics del segundo orden usando un pequeño número de transductores del primer orden; en la parte de producción, se presenta una aplicación para la mezcla automatizada de eventos deportivos, para reducir la complexidad del multicanal en tiempo real; para la restitución del audio independiente del sistema de altavoces, en el que los niveles de salida a los altavoces son una incógnita hasta la decodificación, se propone un detector de clipping independiente del layout. Finalmente, se presentan test psico-acústicos para validar aspectos perceptivos relacionados con el audio 3D. / The advent of 3D audio is dictating changes in several stages of the audio work-flow, from recording systems and microphone configurations, to post-production methodologies and loudspeaker configurations. This thesis tackles aspects related to 3D audio arising in the various stages of production. In the recording part, we present a study on the accuracy of tetrahedral microphones and a solution for obtaining second-order Ambisonics responses from first-order transducers using a small number of sensors; in the production stage, we introduce an application for automated assisted mixing of sport events, to reduce the complexity of managing multiple audio channels in real time; a clipping detector is proposed for the rendering of layout-independent audio content to generic playback systems, where the signal levels sent to the speakers are unknown until the decoding stage; finally, psychoacoustic experiments are presented for the validation of perceptual and aesthetic aspects related to 3D audio.

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