JPS566554A - Data compaction reproduction system - Google Patents

Data compaction reproduction system

Info

Publication number
JPS566554A
JPS566554A JP8234879A JP8234879A JPS566554A JP S566554 A JPS566554 A JP S566554A JP 8234879 A JP8234879 A JP 8234879A JP 8234879 A JP8234879 A JP 8234879A JP S566554 A JPS566554 A JP S566554A
Authority
JP
Japan
Prior art keywords
coincidence
register
characters
units
block
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.)
Granted
Application number
JP8234879A
Other languages
Japanese (ja)
Other versions
JPS6228906B2 (en
Inventor
Sumio Uchiyama
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP8234879A priority Critical patent/JPS566554A/en
Publication of JPS566554A publication Critical patent/JPS566554A/en
Publication of JPS6228906B2 publication Critical patent/JPS6228906B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/46—Conversion to or from run-length codes, i.e. by representing the number of consecutive digits, or groups of digits, of the same kind by a code word and a digit indicative of that kind

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

PURPOSE:To increase the process efficiency by detecting the number of the continuous coincidence units after comparison between the preceding data block and the subsequent data block and in correspondence of the position of the intrablock codes at the time of data compaction and then replacing the detected number into the correspondence codes of the subsequent data block for compaction. CONSTITUTION:In the trasmission device, the data equivalent to one preceding block and the data equivalent to one subsequent block are stored in shift registers 3 and 2 each to be then shifted by the signal sent from line 7. And the characters at the corresponding positions of both blocks are compared to each other at comparator 8. And when the coincidence is obtained in the above comparison, count control circuit 9 carries out counting. While in case no coincidence is obtained, the count number is cleared. And the characters of disagreement are supplied to shift register 4 and then sent to transmission buffer 5. When the number of the units of coincidence becomes >=3, writing circuit 11 is started through circuit 9. And the contents of two characters in register 4 are rewritten by the character coincidence signal, and at the same time gates 16 and 17 are turned off to inhibit the input to register 4. After this, the number of units of coincidence are counted. And when the disagreement is secured, the number of coincidence is set at the rear part of register 4 for transmission.
JP8234879A 1979-06-29 1979-06-29 Data compaction reproduction system Granted JPS566554A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8234879A JPS566554A (en) 1979-06-29 1979-06-29 Data compaction reproduction system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8234879A JPS566554A (en) 1979-06-29 1979-06-29 Data compaction reproduction system

Publications (2)

Publication Number Publication Date
JPS566554A true JPS566554A (en) 1981-01-23
JPS6228906B2 JPS6228906B2 (en) 1987-06-23

Family

ID=13772056

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8234879A Granted JPS566554A (en) 1979-06-29 1979-06-29 Data compaction reproduction system

Country Status (1)

Country Link
JP (1) JPS566554A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5992647A (en) * 1982-11-19 1984-05-28 Fuji Xerox Co Ltd Code transmission system
JPS60136424A (en) * 1983-12-26 1985-07-19 Hitachi Ltd Character data compression method
JPS62179324A (en) * 1986-02-01 1987-08-06 株式会社　大塚産業 Bacteria incorporated artificial culture soil and its production

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5487106A (en) * 1977-12-23 1979-07-11 Fujitsu Ltd Data compression method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5487106A (en) * 1977-12-23 1979-07-11 Fujitsu Ltd Data compression method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5992647A (en) * 1982-11-19 1984-05-28 Fuji Xerox Co Ltd Code transmission system
JPS60136424A (en) * 1983-12-26 1985-07-19 Hitachi Ltd Character data compression method
JPS62179324A (en) * 1986-02-01 1987-08-06 株式会社　大塚産業 Bacteria incorporated artificial culture soil and its production

Also Published As

Publication number Publication date
JPS6228906B2 (en) 1987-06-23

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