![]() ![]() The decoding performance was best when the analysis period began from 180 to 380 ms after stimulus presentation, especially in the lateral occipital and posterior temporal scalp regions (PO7 and PO8). Low-frequency theta and alpha oscillations have phase information with higher accuracy than do other bands. It was observed that the EEG phase signals have a higher decoding accuracy than the oscillation power information. We applied support vector machine (SVM) with gradient descent method to learn the potential features for classification. ![]() ![]() An English letter recognition task was assigned, and statistical analyses were conducted to decode the EEG signal corresponding to each letter visualized on a computer screen. In addition, we investigate how different band oscillations contribute to the classification and determine the critical time periods. Here, we investigate whether and how the letters of the alphabet can be directly decoded from EEG phase and power data. Increasing evidence indicates that the phase pattern and power of the low frequency oscillations of brain electroencephalograms (EEG) contain significant information during the human cognition of sensory signals such as auditory and visual stimuli. 2Institute of Modern Physics, Fudan University, Shanghai, China.1State Key Laboratory of Medical Neurobiology, School of Life Science and the Collaborative Innovation Center for Brain Science, Center for Computational Systems Biology, Institutes of Brain Science, Fudan University, Shanghai, China.A typical use of the NATO Phonetic Alphabet would be to spell out each letter in a word over the phone by saying, for example: "S as in Sierra" (or "S for Sierra"), "E as in Echo, Y as in Yankee, F as in Foxtrot, R as in Romeo, I as in India, E as in Echo, D as in Delta" to communicate the spelling of the name "Seyfried" correctly.YiYan Wang 1,2, Pingxiao Wang 2 and Yuguo Yu 1 *.These are used to avoid misunderstanding due to difficult to spell words, different pronunciations or poor line communication. Spelling alphabets, such as the NATO Phonetic Alphabet, consists of a set of words used to stand for alphabetical letters in oral communication.The NATO Phonetic Alphabet is instead a spelling alphabet (also known as telephone alphabet, radio alphabet, word-spelling alphabet, or voice procedure alphabet). Phonetic alphabets are used to indicate, through symbols or codes, what a speech sound or letter sounds like. Contrary to what its name suggests, the NATO Phonetic Alphabet is not a phonetic alphabet.military and has also been adopted by the FAA (American Federal Aviation Administration), ANSI (American National Standards Institute), and ARRL (American Radio Relay League). Thus this alphabet can be reffered as the ICAO/ITU/NATO Phonetic Alphabet or International Phonetic Alphabet. The NATO (North Atlantic Treaty Organization) Phonetic Alphabet is currently officially denoted as the International Radiotelephony Spelling Alphabet (IRSA) or the ICAO (International Civil Aviation Organization) phonetic alphabet or ITU (International Telecommunication Union) phonetic alphabet. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |