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Brain computer interface
The document discusses brain-computer interfaces (BCIs) and their components, including signal acquisition, feature extraction, and device output. It categorizes BCIs into three types: invasive, partially invasive, and non-invasive, highlighting their signal quality and application differences. The document also mentions the current research status and mentions EEG as a significant non-invasive interface due to its advantages.
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Brain computer interface
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- 6. • Signal acquisition.1 •Feature extraction.2 • Feature translation.3 • Device output.4 Components of a BCI System
- 7. Signal acquisition. • Measurementof brain signals using a particular sensor modality. • Signals are amplified policies • Remove electrical noise • Digitized and transmitted
- 8. Feature extraction • Analyzingthe digital signals to distinguish pertinent signal characteristics. • Features should have strong correlations with the user's intent. Remove electrical noise • Environmental artifacts and physiologic artifacts such as electromyography signals are avoided or removed to ensure accurate
- 9. Feature translation • Convertfeatures into the appropriate commands for the output device • Commands that accomplish the user's intent • The translation algorithm should be dynamic
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- 12. The three typesof BCI. Invasive BCI Partially Invasive BCI Non-Invasive BCI
- 13. INVASIVE BCI Invasive BCIare directly implanted into the grey matter of the brain during neurosurgery They produce the highest quality signals of BCI devices.
- 14. PARTIALLY INVASIVE BCI Partiallyinvasive BCI devices are implanted inside the skull but rest outside the brain rather than amidst the grey matter. They produce better resolution signals than non-invasive BCIs Electrocorticography(ECoG) uses the same technology as non- invasive electroencephalography
- 15. Easy to wear Producepoor signal It is more difficult to determine the area of the brain that create them. Electroencephalography (EEG) is the most studied potential non- invasive interface, mainly due to its fine temporal resolutions, ease of use, portability and low set-up cost.
- 16. The Current Statusof BCI Research & Development
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