High Order Spatial Audio Capture and Its Binaural Head-Tracked Playback Over Headphones with HRTF Cues
Larry Steven Davis, Ramani Duraiswami, Elena Grassi, Nail A. Gumerov, Zhi‐Yun Li, Dmitry N. Zotkin · Journal of the Audio Engineering Society · 2005
A theory and a system for capturing an audio scene and then rendering it remotely are developed and presented. The sound capture is performed with a spherical microphone array. The sound field at the location of the array is deduced from the captured sound and is represented using either spherical wave-functions or plane-wave expansions. The sound field representation is then transmitted to a remote location for immediate rendering or stored for later use. The sound renderer, coupled with the head tracker, reconstructs the acoustic field using individualized head-related transfer functions to preserve the perceptual spatial structure of the audio scene. Rigorous error bounds and Nyquist-like sampling criterion for the representation of the sound field are presented and verified.