Immersive Sound Rendering Using Laser-Based Tracking
Panayiotis Georgiou, Athanasios Mouchtaris, Stergios I. Roumeliotis, Chris Kyriakakis · 2000
In this paper we describe the underlying concepts behind the spatial sound renderer built at the University of Southern California’s Immersive Audio Laboratory. In creating this sound rendering system, we were faced with three main challenges. First the rendering of sound using the Head-Related Transfer Functions, second the cancellation of the crosstalk terms and third the localization of the listener’s ears. To deal with the spatial rendering sound we use a two-layer method of modeling the HRTF’s. The first layer accurately reproduces the ITD’s and IAD’s, and the second layer reproduces the spectral characteristics of the HRTF’s. A novel method for generating the required crosstalk cancellation filters as the listener moves was developed based on Low-Rank modeling. Using Karhunen-Loeve expansion we can interpolate among listener positions from a small number of HRTF measurements. Finally we present a Head Detection algorithm for tracking the location of the listener’s ears in real time using a laser scanner. 1