| 摘要 |
The coding system converts a data bit sequence into a binary channel bit sequence. The data bits are divided into successive blocks, each with the same number of bits, subsequently converted into channel blocks with a greater number of bits, made up of a block of information bits and a block of separation bits. After converting the data bit blocks into information bit blocks each of the possible channel bit sequences incorporating the information bit blocks is obtained. The sum of the number of separation bits and the number of information bits is obtained for each possible sequence and an indication signal denotes the sequences with a sum value lying within two required limits. The sequence which causes the min. imbalance of the DC current is selected from those for which the indication signal is provided. The coding system is used for data transmission or for optical or magnetic recording. |
