Head-Related Impulse Response Interpolation in Virtual Sound System

In order to obtain some head-related impulse responses (HRIRs) not measured in virtual sound system, a real-time interpolation method based on the minimum-phase reconstruction is proposed in this article. The method is composed of three steps: firstly, the original HRIRs are preprocessed and separated into two parts: a minimum-phase reconstruction version and the corresponding inter-aural time difference (ITD); secondly, each part is interpolated by using the simple linear interpolation; finally, the interpolated HRIR is obtained from the above two parts. The simulation experiments show that compared with two typical real-time interpolations algorithms used in the virtual sound system, the proposed method decreases the interpolation error and reduces the computational complexity.