Research Article
The SSVEP-Based BCI Text Input System Using Entropy Encoding Algorithm
Table 1
The encoding results of baseline system.
| Letter | Code | Letter | Code | Letter | Code |
| A | 000 | W | 112 | s | 222 | B | 001 | X | 113 | t | 223 | C | 010 | Y | 120 | u | 232 | D | 011 | Z | 121 | v | 233 | E | 002 | a | 130 | w | 300 | F | 003 | b | 131 | x | 301 | G | 012 | c | 122 | y | 310 | H | 013 | d | 123 | z | 311 | I | 020 | e | 132 | 0 | 302 | J | 021 | f | 133 | 1 | 303 | K | 030 | g | 200 | 2 | 312 | L | 031 | h | 201 | 3 | 313 | M | 022 | i | 210 | 4 | 320 | N | 023 | j | 211 | 5 | 321 | O | 032 | k | 202 | 6 | 330 | P | 033 | l | 203 | 7 | 331 | Q | 100 | m | 212 | 8 | 322 | R | 101 | n | 213 | 9 | 323 | S | 110 | o | 220 | ? | 3320 | T | 111 | p | 221 | ! | 3321 | U | 102 | q | 230 | , | 3322 | V | 103 | r | 231 | . | 3323 |
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