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A coder and a method of coding for codes with a parity-complementary word assignment having a constraint of Ｄ＝1,Ｒ＝2
A coder and a method of coding for codes with a parity-complementary word assignment having a constraint of Ｄ＝1,Ｒ＝2
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机译：约束条件为D ＝ 1，R ＝ 2的奇偶校验互补词分配的编码器和编码方法
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摘要
d = 1 code is now known, and have the whole of the high frequency of occurrence of the shortest 2T run to reduce the performance of a long column, the bit detector consisting of successive 2T run. Using a code having two of the MTR constraint hayeoseo improves upon detection bit. A code consisting of a systematic method for the MTR constraint of 2 is proposed. Variation of such code is used, one of the sub-code, the coding states is divided into a coding class, there is a case which is partitioned into code words are code words form disclosed. Then, for a given sub-code, the form of If the code of the freezing t belongs to one of coding states of the next sub-code, then the code index code eoga class having a T max + 1-t of the cord can be connected eowa of the next sub-code. In the code according to the present invention, the characteristics of the entire code, each channel bit encoded from the same message bit sequence beginning at any of possible states of the finite state machine for each of two values, which is part of DC control bits of the predetermined user word It would have a sequence that has the opposite parity for generating the sequence from the start state to state in both encoder paths are merged. For the case wherein the encoder paths do not merge, there is no restriction as described above. Finally, the new d = 1, k = 10 the sliding block decoding-capable RLL code is disclosed with the following characteristics: (i) it is the ratio R = 2/3 and compatible with the lowest possible MTR values r = 2 constraint have, (ii) it is, because of a compact two three mapping and enabling the real SISO decoding RLL, (iii) uses the complementary parity word assignment (PCWA) for the new code, DC control. ; Coder, PCWA, recording medium, FSM.
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