Empirical determination of frequency representation in spherical harmonics-based HRTF functional modeling
Date
Authors
Zhang, Mengqiu
Kennedy, Rodney
Abhayapala, Thushara
Journal Title
Journal ISSN
Volume Title
Publisher
IEEE Signal Processing Society
Abstract
This paper considers a functional modeling of a head-related transfer function (HRTF) where the spatial-portion is constrained to be expanded using spherical harmonics and the frequency-portion is expanded in terms of standard closed-form orthonormal functions, which may be user selected. We derive an objective evaluation metric to compare the relative energy efficiencies of candidate functional models using empirical HRTF database measurements and robust estimation techniques. Among four sets of closed-form orthonormal functions the complex exponentials are identified as the most efficient to represent the frequency-portion in the spherical harmonics-based HRTF functional model. The proposed model is evaluated across three HRTF data sets: 1) CIPIC database, 2) the MIT KEMAR (Knowles Electronics Mannequin for Acoustics Research) database, and 3) the ANU KEMAR database.
Description
Keywords
Database systems, Energy efficiency, Harmonic analysis, Harmonic functions, Spheres, Complex exponentials, Dimensionality, Functional model, Head related transfer function, Knowles Electronics, Objective evaluation, Orthonormal function, Series expansion, Dimensionality, functional modeling, head-related transfer function (HRTF), series expansion theory
Citation
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Source
IEEE/ACM Transactions on Audio, Speech, and Language Processing
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Book Title
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Restricted until
2099-12-31