Common-Acoustic-Poles/Zeros Modeling and Clustering of HRTFs
| Autor: | C. J. Liu, 劉致榮 |
|---|---|
| Rok vydání: | 2002 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 91 Head-related transfer functions (HRTFs) used in 3-D sound processing are locationally dependent. Fully modeling sound localization cues around the head burdens implementation with a huge data set. Low-order IIR filters are an efficient way to model HRTFs. To further reduce the required memory for storage of model parameters and save computational cost, we propose jointly balanced model truncation for design of common-pole IIR filters. In common-acoustic-poles/zeros (CAPZ) modeling, poles are independent of sound directions and zeros are used to show differences between HRTFs. Not all measured HRTFs have common-pole characteristics, so it is impractical to force all HRTFs share common poles. It is more practical to divide HRTFs into groups and each group has its own common poles. Therefore, clustering of HRTFs becomes essential. We propose an algorithm, common-pole LBG, which iteratively updates the grouping to reach the optimal clustering. Finally, computer simulations are used to verify our proposed methods. We will demonstrate our proposed methods have advantage over previous works. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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