Supplementary information
From the following article:
Evan C. Smith and Michael S. Lewicki
Nature 439, 978-982 (23 February 2006)
doi:10.1038/nature04485
Supplementary Discussion
This file contains additional discussion on the non-linear nature of the spike coding algorithm and comparison of learned kernels and auditory revcor filters.
Supplementary Methods
This file contains additional details of the methods used in this study.
Supplementary Figure 1
Alternate efficient codes emerge when training on other sound ensembles.
Supplementary Figure 2
A quantitative comparison of the correlation between cat revcor filters and different codes.
Supplementary Figure 3
Characterization of spike code kernel functions by reverse correlation.
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