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Binaural HRTF Based Spatialisation: New Approaches and Implementation

Carty, Brian and Lazzarini, Victor (2009) Binaural HRTF Based Spatialisation: New Approaches and Implementation. DAFx 09 proceedings of the 12th International Conference on Digital Audio Effects, Politecnico di Milano, Como Campus, Sept. 1 - 4, Como, Italy. pp. 1-6.

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Abstract

New approaches to Head Related Transfer Function (HRTF) based artificial spatialisation of audio are presented and discussed in this paper. A brief summary of the topic of audio spatialisation and HRTF interpolation is offered, followed by an appraisal of the existing minimum phase HRTF interpolation method. Novel alternatives are then suggested which essentially approach the problem of phase interpolation more directly. The first technique, based on magnitude interpolation and phase truncation, aims to use the empirical HRTFs without the need for complex data preparation or manipulation, while minimizing any approximations that may be introduced by data transformations. A second approach augments a functionally based phase model with low frequency non-linear frequency scaling based on the empirical HRTFs, allowing a more accurate phase representation of the more relevant lower frequency end of the spectrum. This more complex approach is deconstructed from an implementation point of view. Testing of both algorithms is then presented, which highlights their success, and favorable performance over minimum phase plus delay methods.

Item Type: Article
Additional Information: This research is supported by the Irish Research Council for Science, Engineering and Technology: funded by the National Development Plan and NUI Maynooth. V. Lazzarini’s work was supported by An Foras Feasa.
Keywords: Binaural HRTF Based Spatialisation; Head Related Transfer Function; audio spatialisation;
Subjects: Arts, Celtic Studies & Philosophy > Music
Item ID: 2334
Depositing User: Dr Victor Lazzarini
Date Deposited: 12 Jan 2011 16:15
Journal or Publication Title: DAFx 09 proceedings of the 12th International Conference on Digital Audio Effects, Politecnico di Milano, Como Campus, Sept. 1 - 4, Como, Italy
Publisher: Dept. of Electronic Engineering, Queen Mary Univ. of London,
Refereed: Yes
URI:

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