Research Article
The SSVEP-Based BCI Text Input System Using Entropy Encoding Algorithm
Table 3
The encoding results of EEA_D.
| Letter | Code | Letter | Code | Letter | Code |
| A | 2211 | W | 3333 | s | 20 | B | 2332 | X | 1012210 | t | 02 | C | 2213 | Y | 01123 | u | 012 | D | 3313 | Z | 1012211 | v | 330 | E | 3312 | a | 03 | w | 222 | F | 01122 | b | 231 | x | 3331 | G | 10120 | c | 010 | y | 220 | H | 3330 | d | 32 | z | 10123 | I | 2321 | e | 00 | 0 | 332 | J | 10121 | f | 100 | 1 | 0110 | K | 23203 | g | 103 | 2 | 1010 | L | 01120 | h | 30 | 3 | 2330 | M | 2212 | i | 13 | 4 | 2323 | N | 2322 | j | 23200 | 5 | 0113 | O | 01121 | k | 0111 | 6 | 2333 | P | 3311 | l | 31 | 7 | 3332 | Q | 101223 | m | 013 | 8 | 2331 | R | 3310 | n | 12 | 9 | 2210 | S | 1013 | o | 11 | ? | 101222 | T | 1011 | p | 102 | ! | 1012212 | U | 23201 | q | 23202 | , | 223 | V | 101220 | r | 21 | . | 230 |
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