In this paper we propose two metrics for the evaluation of the impact of pre-echoes and post-echoes on theperceived quality in soundfield rendering applications. These metrics are derived from psychoacoustic-basedconsiderations, in particular the masking effect, well known in the literature of perceptual coding. Themeasurement is accomplished through a virtual microphone array that samples the soundfield on acircumference. The soundfield within the circle is estimated by means of the circular harmonic decomposition. As a result, space-time impulse responses of the rendering system are obtained, which are then analyzed through the masking curve to extract the pre- and post-echoes metrics. A comparison between experimentaland simulative results, conducted using the same setup, allows to discriminate the impact of the adopted rendering engine and of the non-idealities of the real system (environment and loudspeakers) on pre- andpost-echoes.

A Psychoacoustic-Based Analysis of the Impact of Pre-Echoes and Post-Echoes in Soundfield Rendering Applications

BIANCHI, LUCIO;ANTONACCI, FABIO;CANCLINI, ANTONIO;SARTI, AUGUSTO;TUBARO, STEFANO
2012-01-01

Abstract

In this paper we propose two metrics for the evaluation of the impact of pre-echoes and post-echoes on theperceived quality in soundfield rendering applications. These metrics are derived from psychoacoustic-basedconsiderations, in particular the masking effect, well known in the literature of perceptual coding. Themeasurement is accomplished through a virtual microphone array that samples the soundfield on acircumference. The soundfield within the circle is estimated by means of the circular harmonic decomposition. As a result, space-time impulse responses of the rendering system are obtained, which are then analyzed through the masking curve to extract the pre- and post-echoes metrics. A comparison between experimentaland simulative results, conducted using the same setup, allows to discriminate the impact of the adopted rendering engine and of the non-idealities of the real system (environment and loudspeakers) on pre- andpost-echoes.
2012
Proceedings of the International Workshop on Acoustic Signal Enhancement (IWAENC 2012)
9783800734511
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/693052
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