BAUMGARTNER2014_GRADIENTEXTRACTION
Extraction of positive spectral gradients

Usage:

[gp,gfc] = baumgartner2014_gradientextraction(mp,fc)

Input parameters:

`mp`	spectral magnitude profile in dB
`fc`	center frequencies

Output parameters:

`gp`	positive spectral gradient profile
`gfc`	center frequencies of gradient profile

Description:

baumgartner2014_gradientextraction(...) is a spectral cue extractor inspired by functionality of dorsal cochlear nucleus in cats.

baumgartner2014_gradientextraction accepts the following optional parameters:

`'c2',c2`	Inhibitory coupling between type II mpd type IV neurons. Default is 1.
`'c4',c4`	Inhibitory coupling between AN and type IV neuron. Default is 1.
`'spacing',sp`	Tonotopical spacing between type IV mpd II neurons in ERBs. Default is 1 ERB.

baumgartner2014_gradientextraction accepts the following flags:

`'positive'`	Perform positive spectral gradient extraction (default).
`'negative'`	Perform negative spectral gradient extraction.
`'both'`	Perform spectral gradient extraction.

References:

R. Baumgartner, P. Majdak, and B. Laback. Modeling sound-source localization in sagittal planes for human listeners. The Journal of the Acoustical Society of America, 136(2):791--802, 2014. [ DOI ]