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Supplementary information

From the following article:

Efficient auditory coding

Evan C. Smith and Michael S. Lewicki

Nature 439, 978-982 (23 February 2006)

doi:10.1038/nature04485

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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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