Perceived Quality and Plausibility of Room Reverberation in VR Reproduction from Measured Images and Acoustics.
* Presenting author
Virtual reality (VR) systems have emerged as platforms for personal interactive audio-visual media experiences. In order to have a real world reference against which to evaluate the room acoustics reproduced within VR, methods are needed to compare the virtual experience with that of a real room. In this work, two pipelines were developed for evaluating room reverberation over headphones within VR, acoustically and visually. The acoustical pipeline involves parameterisation of B-format room impulse responses via the reverberant spatial audio object (RSAO) and subsequent binaural rendering. The optical pipeline uses stereo 360 images to reconstruct the room geometry and materials that are then translated into binaural via two popular VR software development kits. Formal audio-visual subjective tests were conducted to obtain ratings of perceived quality and plausibility, using hidden anchors, for six captured rooms. The results show a trade off between quality and interactivity, meanwhile the virtual acoustics were confirmed as plausible reproductions of the original rooms. Further work will examine methods to enhance the interactivity with realistic spatial room reverberation.