CAR-Lite: A Multi-Rate Cochlear Model on FPGA for Spike-Based Sound Encoding
| Autor: | Ram Kuber Singh, Runchun Wang, André van Schaik, Tara Julia Hamilton, Susan L. Denham, Ying Xu |
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| Rok vydání: | 2019 |
| Předmět: |
Computer science
business.industry 020208 electrical & electronic engineering 02 engineering and technology ENCODE Filter design Hardware and Architecture Gate array Encoding (memory) 0202 electrical engineering electronic engineering information engineering Spike (software development) Electrical and Electronic Engineering Representation (mathematics) business MATLAB Field-programmable gate array computer Computer hardware computer.programming_language |
| Zdroj: | IEEE Transactions on Circuits and Systems I: Regular Papers. 66:1805-1817 |
| ISSN: | 1558-0806 1549-8328 |
| Popis: | Filters in cochlear models use different coefficients to break sound into a 2-D time-frequency representation. On digital hardware with a single sampling rate, the number of bits required to represent these coefficients requires substantial computational resources such as memory storage. In this paper, we present a cochlear model operating at multiple sampling rates. As a result, fewer bits are required to represent filter coefficients on hardware as opposed to all the filters operating at a single sampling rate; with a 108-filter cochlear implementation, up to nine times fewer coefficients are needed. We present an implementation of this model in Matlab and on an Altera Cyclone V field-programmable gate array. We also demonstrate the capability of our model to encode sound at various intensity levels and with real-world signals. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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