+--------+--------+--------+--------+--------+--------+--------+--------+
|9th bit |    1   |    0   |    0   |    1   |    0   |    0   |        |
|data bit|HHHHLLLL|LLLLHHHH|LLLLLLLL|HHHHLLLL|LLLLHHHH|LLLLLLLL| repeat |
|flag    |    0   |    1   |    0   |    0   |    1   |    0   |        |
+--------+--------+--------+--------+--------+--------+--------+--------+