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Perceptual Evaluation of Loudspeaker Misplacement Compensation in a Multichannel Setup Using MPEG-H 3D Audio Renderer. Application to Channel-Based, Scene-Based, and Object-Based Audio Materials

Multichannel and immersive audio technologies are usually tied to specific loudspeaker layouts. Any loudspeaker misplacement relative to these predefined positions might degrade the overall sound quality. To avoid this situation, some Next Generation Audio codecs offer the possibility to compensate for angular misplacement of loudspeakers. The experiment presented in this paper investigates the perceptual impact of loudspeakers angular misplacement in a 5.0 multichannel setup, with and without the angular compensation implemented in the MPEG-H 3D Audio decoder. Three audio formats are tested: Channel, Scene, and Object-Based contents. The experiment is conducted on two test sites and reveals that the benefit of the angular compensation essentially depends on the sound stimulus. No significant effect of the audio formats tested was found.

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Permalink: http://www.aes.org/e-lib/browse.cfm?elib=20393

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