| 摘要 |
For encoding a current data word to be encoded, a most suitable redundant signal for the current data word to be encoded is generated by referring to a next data word to be encoded, that is, using a look-ahead decision method. The current data word to be encoded is encoded by using this redundant signal. A low-frequency component of the encoded data is effectively suppressed without decreasing encoding efficiency, by using both a regular substitution code and a stochastic substitution code, and a look-ahead determination algorithm for changing the length of words of a data segment, based on stochastic occurrence of a substitution word.
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