Improvements in HRTF dataset of 3D game audio application

Abstract

OpenAL-Soft is a 3D audio application programming interface (API), which can be used to render the 3D virtual soundscape through sound signal processing based on the head-related transfer functions (HRTFs). However, the performance is still unsatisfied because of the oversimplified HRTF dataset that is left-right symmetrical and incomplete in spatial sampling. In order to improve the 3D sound reproduction performance of game audio, in current work, the left-right asymmetric HRTFs with full space sampling are adopted. Simulated results show that the more accurate magnitude spectra can be rendered by the improved HRTF dataset. The enlarged HRTF dataset could increase the memory footprint, but computation expense varies little.