Title
Adaptive Sampling for Sound Propagation.
Abstract
Precomputed sound propagation samples acoustics at discrete scene probe positions to support dynamic listener locations. An offline 3D numerical simulation is performed at each probe and the resulting field is encoded for runtime rendering with dynamic sources. Prior work place probes on a uniform grid, requiring high density to resolve narrow spaces. Our adaptive sampling approach varies probe density based on a novel "local diameter" measure of the space surrounding a given point, evaluated by stochastically tracing paths in the scene. We apply this measure to layout probes so as to smoothly adapt resolution and eliminate undersampling in corners, narrow corridors and stairways, while coarsening appropriately in more open areas. Coupled with a new runtime interpolator based on radial weights over geodesic paths, we achieve smooth acoustic effects that respect scene boundaries as both the source or listener move, unlike existing visibility-based solutions. We consistently demonstrate quality improvement over prior work at fixed cost.
Year
DOI
Venue
2019
10.1109/TVCG.2019.2898765
IEEE transactions on visualization and computer graphics
Keywords
Field
DocType
Probes,Runtime,Interpolation,Acoustics,Games,Geometry,Three-dimensional displays
Computer vision,Visibility,Computer simulation,Computer science,Adaptive sampling,Interpolation,Undersampling,Artificial intelligence,Rendering (computer graphics),Tracing,Geodesic
Journal
Volume
Issue
ISSN
25
5
1941-0506
Citations 
PageRank 
References 
0
0.34
7
Authors
5
Name
Order
Citations
PageRank
Chakravarty R. Alla Chaitanya1332.49
John Snyder22579172.17
Keith Godin300.34
Derek Nowrouzezahrai480154.49
Nikunj Raghuvanshi532621.56