JPS6461122A - Coding system for digital information - Google Patents
Coding system for digital informationInfo
- Publication number
- JPS6461122A JPS6461122A JP21639687A JP21639687A JPS6461122A JP S6461122 A JPS6461122 A JP S6461122A JP 21639687 A JP21639687 A JP 21639687A JP 21639687 A JP21639687 A JP 21639687A JP S6461122 A JPS6461122 A JP S6461122A
- Authority
- JP
- Japan
- Prior art keywords
- value
- bit
- minimum
- unit
- gradient
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
PURPOSE:To set a gradient of magnetization inversion interval with respect to a discrimination timing window width optionally by adopting only a value as a run length such that it is a value between a minimum value (d) being an optional integer and a maximum, value (k) being other integer and a result of addition of an integral number of multiple of a positive integer being two or over and being an increment from a minimum value (d) and unable to divide (d+1). CONSTITUTION:A 4-bit or 5-bit unit of an original digital information string not limited is converted into 14-bit or 17-bit of a run length limit code, and d=4, k=16, s=2 are used in this case. The run length of '0' is used for an increment only in the unit of an optional positive integer (s>=2) unable to divide the value (d) till its maximum value (k) started from the minimum value (d). Thus, in converting m-bit unit of the original signal into n-bit, the minimum magnetization inversion interval R represented in the unit of the interval of 1-bit of the original data is m/n(d+1), the ratio (gradient) between the minimum magnetization inversion interval R and the data discrimination window width W is expressed as (d+1)/s thereby obtaining an optional gradient by varying the value (s) with respect to the value (d).
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21639687A JPS6461122A (en) | 1987-09-01 | 1987-09-01 | Coding system for digital information |
US07/226,321 US4914438A (en) | 1987-09-01 | 1988-07-29 | Digital information coding system |
DE3825960A DE3825960A1 (en) | 1987-09-01 | 1988-07-29 | METHOD AND DEVICE FOR DIGITAL INFORMATION CODING |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21639687A JPS6461122A (en) | 1987-09-01 | 1987-09-01 | Coding system for digital information |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6461122A true JPS6461122A (en) | 1989-03-08 |
Family
ID=16687905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21639687A Pending JPS6461122A (en) | 1987-09-01 | 1987-09-01 | Coding system for digital information |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6461122A (en) |
-
1987
- 1987-09-01 JP JP21639687A patent/JPS6461122A/en active Pending
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