Common-acoustic-poles and zeros modeling using jointly balanced model truncation

We propose a new technique for common-acoustic-poles and zeros (CAPZ) modeling. In 3D sound processing, head-related transfer functions (HRTF´s) record channels´ characteristics from different locations to both ears. Compared to conventional pole/zero models, it is more efficient to model HRTF´s by using CAPZ modeling. Based on balanced model truncation (BMT), jointly BMT is proposed to effectively model a group of HRTF´s using common-poles IIR filters. The simulation result shows the proposed method is superior to the previous Prony and Shanks methods.