Abstract
The Nucleus Freedom cochlear implant system enables a profoundly deaf person to hear. The system consists of a surgically implanted stimulator and a battery-powered external sound processor. The processor is based on a 0.18 μm CMOS ASIC containing four DSP cores. The signal processing includes a two-microphone adaptive beamformer, a 22-channel quadrature FFT filterbank, multi-band automatic gain control, a psycho-acoustic masking model and non-linear compression. The key design challenge was power consumption.
Original language | English |
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Title of host publication | Proceedings of the IEEE 2007 Custom Integrated Circuits Conference, CICC 2007 |
Place of Publication | Piscataway, NJ |
Publisher | Institute of Electrical and Electronics Engineers (IEEE) |
Pages | 437-442 |
Number of pages | 6 |
ISBN (Electronic) | 1424407869, 9781424407866 |
DOIs | |
Publication status | Published - 2007 |
Externally published | Yes |
Event | 29th Annual IEEE Custom Integrated Circuits Conference, CICC 2007 - San Jose, United States Duration: 16 Sep 2007 → 19 Sep 2007 |
Other
Other | 29th Annual IEEE Custom Integrated Circuits Conference, CICC 2007 |
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Country/Territory | United States |
City | San Jose |
Period | 16/09/07 → 19/09/07 |