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A local representation of the head-related transfer function.
Shichao Hu1, Jorge Trevino1, Cesar Salvador1
1Research Institute of Electrical Communication and Graduate School of Information Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-0813, Japan shichao@ais.riec.tohoku.ac.jp, jorge@ais.riec.tohoku.ac.jp, salvador@ais.riec.tohoku.ac.jp, saka@ais.riec.tohoku.ac.jp.
The Journal of the Acoustical Society of America
|December 5, 2016
Summary
This study introduces a new method for describing the head-related transfer function (HRTF) using local analysis functions. This approach allows for variable angular resolution, improving HRTF modeling for perceptual studies.
Area of Science:
- Acoustics
- Signal Processing
- Psychoacoustics
Background:
- Spherical harmonics are commonly used for Head-Related Transfer Function (HRTF) spatial descriptions, considering all directions uniformly.
- Perceptual studies often require HRTFs to be modeled with varying angular resolutions depending on the direction.
Purpose of the Study:
- To introduce an alternative spatial representation for HRTFs based on local analysis functions.
- To enable HRTF modeling with direction-dependent angular resolution for perceptual applications.
Main Methods:
- Developed a novel spatial representation of the HRTF using local analysis functions.
- Compared the reconstruction error of the proposed method against spherical harmonic decomposition within a spherical cap.
Main Results:
- The proposed local analysis function-based representation shows potential for describing local HRTF features.
- The new method achieved a lower reconstruction error compared to spherical harmonics for HRTF reconstruction within a spherical cap.
Conclusions:
- The proposed local analysis function method offers a more flexible and potentially more accurate way to represent HRTFs, especially for perceptual studies.
- This approach allows for adaptive angular resolution, better capturing spatially varying HRTF characteristics.
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