04760378 is referenced by 40 patents and cites 6 patents.

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 2.sup.n 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.

Title
Method and apparatus for converting a run length limited code
Application Number
6/719629
Publication Number
4760378
Application Date
April 3, 1985
Publication Date
July 26, 1988
Inventor
Ichiro Ogura
Hirakata
JP
Kunio Suesada
Ikoma
JP
Chojuro Yamamitsu
Kawanishi
JP
Akira Iketani
Higashiosaka
JP
Agent
Spencer & Frank
Assignee
Matsushita Electric Industrial
JP
IPC
H03M 7/00
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