ITD2ANGLE_LOOKUPTABLE - generates an ITD-azimuth lookup table for the given HRTF set

Usage

lookup = itd2angle_lookuptable(hrtf,fs,model);
lookup = itd2angle_lookuptable(hrtf,fs);
lookup = itd2angle_lookuptable(hrtf);

Input parameters

`hrtf`	HRTF data set (as SOFA file or struct)
`fs`	sampling rate, (default: 44100) / Hz
`model`	binaural model to use: 'dietz2011' uses the Dietz binaural model (default) 'lindemann1986' uses the Lindemann binaural model

Output parameters

lookup

struct containing the polinomial fitting data for the ITD -> azimuth transformation, p,MU,S, see help polyfit

Description

itd2angle_lookuptable(hrtf) creates a lookup table from the given HRTF data set. This lookup table can be used by the dietz2011 or lindemann1986 binaural models to predict the perceived direction of arrival of an auditory event. The azimuth angle is stored in degree in the lookup table.

For the handling of the HRTF SOFA file format see http://www.sofaconventions.org/

References:

M. Dietz, S. D. Ewert, and V. Hohmann. Auditory model based direction estimation of concurrent speakers from binaural signals. Speech Communication, 53(5):592--605, 2011. [ DOI | http ]

H. Wierstorf, M. Geier, A. Raake, and S. Spors. A free database of head-related impulse response measurements in the horizontal plane with multiple distances. In Proceedings of the 130th Convention of the Audio Engineering Society, 2011.