baumgartner2013_pmv2ppp - PMV to PPP conversion

Usage

[ qe,pe,eb ] = baumgartner2013_pmv2ppp( p,tang,rang );
[ qe,pe,eb ] = baumgartner2013_pmv2ppp( p,tang,rang,exptang );

Input parameters

`p`	prediction matrix (response PMVs)
`tang`	possible polar target angles. As default, ARI's MSP polar angles in the median SP is used.
`rang`	polar angles of possible response angles. As default regular 5 deg.-sampling is used (-30:5:210).

Output parameters

`qe`	quadrant error rate
`pe`	local polar RMS error in degrees
`eb`	elevation bias in degrees; QEs and up-rear quadrant excluded

baumgartner2013_pmv2ppp(...) retrieves commonly used PPPs (Psychoacoustic performance parameters) for sagittal-plane (SP) localization like quadrant error (QEs), local polar RMS error (PE), and elevation bias (EB) from response PMVs (probability mass vectors) predicted by a localization model. PPPs are retreived either for a specific polar target angle or as an average across all available target angles. The latter is the default.

baumgartner2013_pmv2ppp needs the following optional parameter in order to retrieve the PPPs for a specific (set of) target angles:

'exptang= exptang experimental polar target angles'

baumgartner2013_pmv2ppp accepts the following flag:

'print'

Display the outcomes.

Example:

To evaluate chance performance of QE and PE use

[qe,pe] = baumgartner2013_pmv2ppp(ones(49,49));

References:

R. Baumgartner. Modeling sagittal-plane sound localization with the application to subband-encoded head related transfer functions. Master's thesis, University of Music and Performing Arts, Graz, June 2012. [ .pdf ]

R. Baumgartner, P. Majdak, and B. Laback. Assessment of Sagittal-Plane Sound Localization Performance in Spatial-Audio Applications, chapter 4, pages 93--119. Springer-Verlag GmbH, 2013.