JPS5483411A - Binary data coding system - Google Patents

Binary data coding system

Info

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
Application number
JP15129677A
Other languages
Japanese (ja)
Inventor
Toshio Horiguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP15129677A priority Critical patent/JPS5483411A/en
Publication of JPS5483411A publication Critical patent/JPS5483411A/en
Pending legal-status Critical Current

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
JP15129677A 1977-12-15 1977-12-15 Binary data coding system Pending JPS5483411A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (7)

* Cited by examiner, † Cited by third party
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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