The problem of modeling head-related transfer functions (HRTFs) is addresse
d. Traditionally HRTFs are approximated in real-time applications using min
imum-phase reconstruction and various digital filter design techniques, yie
lding FIR or IIR structures. In this work, binaural auditory modeling has b
een applied to HRTF analysis, and filter design methods have been compared
from the auditory perception point of view. Applicable perceptually valid f
ilter design techniques are presented, and listening test results for local
ization and timbre degradation are discussed.