Perceptive Evaluation of Sound Field Rotation Methods in the Context of Dynamic Binaural Rendering of Ambisonics Signals
* Presenting author
The popularity of Virtual Reality rendering in the recent years made Ambisonics playback become more relevant in the context of headphone reproduction of auditory scenes. In that sense, in order to provide a realistic, plausible, immersive experience, the user’s head rotation has to be considered in the rendering process in a way that the virtual acoustic scene appears to remain stable regardless of the listener's head orientation. This is achieved by rotating the virtual scene in the opposite direction to the listener's head rotation. In this paper three ways of performing rotation of Ambisonics content for binaural reproduction are compared regarding perceptual quality: Exchanging HRTFs of the rendering layout, rotating the Ambisonics signal and using VBAP for rotating the virtual rendering layout. The results show that Ambisonics domain rotation and rotation using a VBAP approach achieved the best ratings. Rotation relying on switching HRTF filters received the lowest ratings.