Structured IIR Models For HRTF Interpolation
نویسندگان
چکیده
In this article we propose a structured IIR model for HRTF filters that can be applied to multi-user binaural soundscape rendering of virtual sound sources moving continuously in 3D space. A motivation for using low-order IIR models in HRTF interpolation is to trade some reasonable amount of soundscape fidelity for computational performance. Two strategies for interpolation of these IIRmodels are discussed, one using filter coefficients and the other using pole-zero models. Numerical experiments show that low-order structured IIR models provide reasonably good fitting of the original filters, allow for a larger number of simultaneous simulations than FIR equivalents, and may be used in an interpolation context without severely degrading the quality of the soundscape approximations.
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