+---------+---------+------------+------------+
| Length | offset | byte 0 | byte 1 |
+---------+---------+------------+------------+
| 16 bit | | 0bxxxxxx00 | 0bxxxxxxxx |
| | | 0bxxxxxx01 | 0bxxxxxxxx |
| | | 0bxxxxxx10 | 0bxxxxxxxx |
+---------+---------+------------+------------|
| 32 bit | | 0bxxx00011 | 0bxxxxxxxx |
| | | 0bxxx00111 | 0bxxxxxxxx |
| | | 0bxxx01011 | 0bxxxxxxxx |
| | | 0bxxx01111 | 0bxxxxxxxx |
| | | 0bxxx10011 | 0bxxxxxxxx |
| | | 0bxxx10111 | 0bxxxxxxxx |
| | | 0bxxx11011 | 0bxxxxxxxx |
+---------+---------+------------+------------|
| 48 bit | | 0bxx011111 | 0bxxxxxxxx |
+---------+---------+------------+------------|
| 64 bit | | 0bx0111111 | 0bxxxxxxxx |
+---------+---------+------------+------------|
| 80 bit | | 0bx1111111 | 0bx000xxxx |
+---------+---------+------------+------------|
| 96 bit | | 0bx1111111 | 0bx001xxxx |
+---------+---------+------------+------------|
| 112 bit | | 0bx1111111 | 0bx010xxxx |
+---------+---------+------------+------------|
| 128 bit | | 0bx1111111 | 0bx011xxxx |
+---------+---------+------------+------------|