JPS5483411A - Binary data coding system - Google Patents
Binary data coding systemInfo
- Publication number
- JPS5483411A JPS5483411A JP15129677A JP15129677A JPS5483411A JP S5483411 A JPS5483411 A JP S5483411A JP 15129677 A JP15129677 A JP 15129677A JP 15129677 A JP15129677 A JP 15129677A JP S5483411 A JPS5483411 A JP S5483411A
- Authority
- JP
- Japan
- Prior art keywords
- bits
- codes
- binary
- thru
- circuits
- 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
Abstract
PURPOSE: To perform 8/9 information rate conversion in which the continuation of binary value "0" is lessthan 4 and the length of error propagation is short by converting the binary 8-bit codes to 9-bit codes according to logical combinations of specified bits.
CONSTITUTION: When the upper 4 bits X1 and X2, Y1 and Y2 of 8 bits binary data codes X1, X2, Y1, Y2, Z1, Z2, Z3, Z4 are combined by logic circuits, the coding condition signals a1 thru a3 according to the combinations are determined. When these signals a1 thru a3 and the binary codes of the respective bits are processed in AND circuits 10 thru 15, OR circuits 17 thru 20, the binary codes of 8 bits are subjected to 8/9 information rate conversion to 9 bits binary codes of repective bits C1 thru C9 based on the formulas I, II with the simple constitution. The 9 bits binary codes thus converted are restricted in less than 4 in the continuation of binary value "0" and may be made to the codes of a short error propagation length. Decoding is also readily accomplished in a similar manner.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15129677A JPS5483411A (en) | 1977-12-15 | 1977-12-15 | Binary data coding system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15129677A JPS5483411A (en) | 1977-12-15 | 1977-12-15 | Binary data coding system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5483411A true JPS5483411A (en) | 1979-07-03 |
Family
ID=15515573
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15129677A Pending JPS5483411A (en) | 1977-12-15 | 1977-12-15 | Binary data coding system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5483411A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56105312A (en) * | 1980-01-24 | 1981-08-21 | Mitsubishi Electric Corp | Recording and reproducing method of binary information signal |
JPS56105313A (en) * | 1980-01-24 | 1981-08-21 | Mitsubishi Electric Corp | Recording and reproducing method of binary information signal |
JPS576420A (en) * | 1980-06-13 | 1982-01-13 | Mitsubishi Electric Corp | Binary data modulating and demodulating methods |
JPS62216444A (en) * | 1986-03-17 | 1987-09-24 | Fujitsu Ltd | Code conversion method |
-
1977
- 1977-12-15 JP JP15129677A patent/JPS5483411A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56105312A (en) * | 1980-01-24 | 1981-08-21 | Mitsubishi Electric Corp | Recording and reproducing method of binary information signal |
JPS56105313A (en) * | 1980-01-24 | 1981-08-21 | Mitsubishi Electric Corp | Recording and reproducing method of binary information signal |
JPS6355151B2 (en) * | 1980-01-24 | 1988-11-01 | Mitsubishi Electric Corp | |
JPS6355152B2 (en) * | 1980-01-24 | 1988-11-01 | Mitsubishi Electric Corp | |
JPS576420A (en) * | 1980-06-13 | 1982-01-13 | Mitsubishi Electric Corp | Binary data modulating and demodulating methods |
JPS6360465B2 (en) * | 1980-06-13 | 1988-11-24 | ||
JPS62216444A (en) * | 1986-03-17 | 1987-09-24 | Fujitsu Ltd | Code conversion method |
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