Title:
SYSTEM FOR CODING AND DECODING BINARY DATA
Document Type and Number:
WIPO Patent Application WO/1982/000912
Kind Code:
A1
Abstract:
A binary data coding system particularly adapted for a magnetic recording and reproduction, which system limits the minimum and maximum values of a reverse magnetization distance so as to obtain a higher recording density. Binary data are divided by every 2 bits and the code of every 2 bits is input into a read-only memory (7) together with the adjacent codes before and behind, e. g. the preceding 2 bits and the following 4 bits and then output after converted into a 4-bit code. In the bit arrangement of the converted code, the number of the code bits "0" present sequentially between the code bit "1" at an arbitrary point and the following code bit "1" is limited, for example, in a range of 2 to 8. The converted code-signal line is magnetically recorded in such a manner that a reverse magnetization is made corresponding to every code bit "1".
Inventors:
FURUKAWA T (JP)
Application Number:
PCT/JP1981/000218
Publication Date:
March 18, 1982
Filing Date:
September 04, 1981
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
FURUKAWA T (JP)
FURUKAWA T (JP)
International Classes:
G11B20/14; (IPC1-7): G11B5/09; H04L25/49
Foreign References:
| JPH05311011A | 1993-11-22 |
Other References:
IBM-Journal of Research and Development, Vol. 14, No. 4, (1970), P.A. FRANASZEK "Sequence-state Methods for Run-length -limited Coding", P. 376-383, especially see Table 2 on P. 378 - 379
See also references of EP 0059224A4
See also references of EP 0059224A4
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