ZIEGELWANGER2013 - Time of arrival estimates

Usage

[Obj,results]=ziegelwanger2013(Obj,method,model,p0_onaxis)

Input parameters

`Obj`	SOFA object
`method`	(Optional) Select one of the estimation methods
`model`	(Optional) Correct estimated toa, using geometrical TOA-Model. If \(model=0\) use TOA estimated, if \(model=1\) use TOA modeled (default).
`p0_onaxis`	(optional) Starting values for `lsqcurvefit`

Output parameters

Obj

SOFA Object

results.toa: data matrix with time of arrival (TOA) for each impulse response (IR):
results.p_onaxis: estimated on-axis model-parameters
results.p_offaxis: estimated off-axis model-parameters

Estimates the Time-of-Arrival for each measurement in Obj (SOFA) and corrects the results with a geometrical model of the head.

The value of method is an integer choosing one of the following methods. XXX Explain for each method a little about how they work:

Threshold-Detection
Centroid of squared IR
Mean Groupdelay
Minimal-Phase Cross-Correlation (Max) (default)

Requirements:

SOFA API from http://sourceforge.net/projects/sofacoustics for Matlab (in e.g. thirdparty/SOFA)
Optimization Toolbox for Matlab
Data in hrtf/ziegelwanger2013

Examples:

To calculate the model parameters for the on-axis time-of-arrival model (p_onaxis) and for the off-axis time-of-arrival model (p_offaxis) for a given HRTF set (SOFA object, 'Obj') with the minimum-phase cross-correlation method, use:

[Obj,results]=ziegelwanger2013(Obj,4,1);

References:

P. Majdak and H. Ziegelwanger. Continuous-direction model of the broadband time-of-arrival in the head-related transfer functions. In ICA 2013 Montreal, volume 19, page 050016, Montreal, Canada, 2013. ASA. [ DOI ]

H. Ziegelwanger and P. Majdak. Modeling the broadband time-of-arrival of the head-related transfer functions for binaural audio. In Proceedings of the 134th Convention of the Audio Engineering Society, page 7, Rome, 2013.