Controlling Programme Loudness in Individualized Binaural Rendering of Multi-Channel Audio Contents

Emmanuel Ponsot (1, 2) , Hervé Déjardin (2) , Edwige Roncière (2)

1 Equipe Perception et design sonores
2 Radio France

For practical reasons, we often experience multi-channel audio productions in binaural context (e.g. headphones on mobile devices). To make listeners benefit from optimal binaural rendering (" BiLi project "), Radio France developed nouvOson (http://nouvoson.radiofrance.fr/), an online audio platform where listeners can select HRTFs and ITDs that best fit them. The goal of the present study was to control the programme loudness (measured according to the ITU-R BS.1770 / R128 recommendations) after binauralization. To this end, we examined the influence of various parameters such as the audio content (synthetic vs. real broadcast audio), HRTFs and ITDs on loudness. We propose a dynamic process, which adapts the gain in the binauralization chain so as to control the output loudness of virtual surround audio contents.

Mots clés: loudness; binauralization; multi-channel content; R-128 normalization; metadata

Domaines: Psychologie; Acoustique [physics.class-ph]

Emmanuel Ponsot, Hervé Déjardin, Edwige Roncière. Controlling Programme Loudness in Individualized Binaural Rendering of Multi-Channel Audio Contents. AES Convention, Jun 2016, Paris, France. ⟨hal-01429679⟩