Code modulation method, code modulation method, and code decoding method

摘要

In PR (1.1), it is possible to increase the geometric distance and shorten the length of the path memory without performing DSV.;3 x 3 states are arranged on the plane constituted by the horizontal axis and the vertical axis. The code 11 is assigned in correspondence with the transition to the right direction of the horizontal axis, and the code 00 is assigned to the transition in the left direction. 01 is assigned in correspondence with the transition in the upward direction facing the vertical axis, and 10 is assigned in correspondence with the transition in the downward direction. State 5, state 7, state 7, state 7, state 7, state 5, state 7, state 5, state 7, state 5, It is used as a code after conversion. For example, in the state 1, state 4, state 7, state 8, state 7, state 4, state 1 transition, the sign of 01, 01, 11, 00, 10,