发明名称 |
Method and apparatus for converting a run length limited code |
摘要 |
A systematic method and apparatus for constructing a run length limited code in which the minimum number of continuous bits of the same binary value is constrained to d and the maximum number thereof is constrained to k. In converting m-bit data words to n-bit code words (n>m) to construct the run length limited code, selection means for n-bit code words usable to meet the d, k-constraint and a concatenation rule of the code words selected by the selection means are introduced. The selection means divides each of 2n n-bit bit sequences into a leading block L having l continuous bits of the same binary value, an end block R having gamma continuous bits of the same binary value and an intermediate block B having b(=n-l- gamma ) bits between the blocks L and R. Only those n-bit bit sequences in which the blocks B thereof completely meet the d, k-constraint and the blocks L and R thereof meet conditions uniquely defined for given d and k are used as the code words. Consequently, a systematic method for constructing the run length limited code is provided.
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申请公布号 |
US4760378(A) |
申请公布日期 |
1988.07.26 |
申请号 |
US19850719629 |
申请日期 |
1985.04.03 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
IKETANI, AKIRA;YAMAMITSU, CHOJURO;SUESADA, KUNIO;OGURA, ICHIRO |
分类号 |
G11B20/14;(IPC1-7):H03M7/00 |
主分类号 |
G11B20/14 |
代理机构 |
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地址 |
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