JPS5444418A - Data compression system - Google Patents

Data compression system

Info

Publication number
JPS5444418A
JPS5444418A JP11079477A JP11079477A JPS5444418A JP S5444418 A JPS5444418 A JP S5444418A JP 11079477 A JP11079477 A JP 11079477A JP 11079477 A JP11079477 A JP 11079477A JP S5444418 A JPS5444418 A JP S5444418A
Authority
JP
Japan
Prior art keywords
scanning line
coded
transit
pattern
disagreement
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
JP11079477A
Other languages
Japanese (ja)
Inventor
Noboru Murayama
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP11079477A priority Critical patent/JPS5444418A/en
Publication of JPS5444418A publication Critical patent/JPS5444418A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To increase the compression rate, by coding the agreement and disagreement pattern of the preceding scanning line and the coded scanning line in the order of appearance of transit point, in facsimile.
CONSTITUTION: When the pattern A⊕B of agreement and disagreement is fed to transmit the information of coded scanning line B after the preceding scanning line A with the main scanning X and subscanning Y, the pattern A⊕ is represented with the location difference 4, 2, 4... of transit points and the number 1, 3, 1, 1... of the transit points as shown in Fig. 2a. Taking the preceding scanning line as B and the coded scanning line as C, the pattern B⊕C is represented in the form of Fig. 2b. Taking the code of position difference of the transit points as RLB, the code of numerals as NB, "O" as the transit position of the coded scanning lines, and "1" as the display for the transit position of preceding scanning lines, the patterns of A⊕B and B⊕C as shown in Fig. 3a and 3b are coded. Further,⊕ indicates exclusive OR.
COPYRIGHT: (C)1979,JPO&Japio
JP11079477A 1977-09-14 1977-09-14 Data compression system Pending JPS5444418A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11079477A JPS5444418A (en) 1977-09-14 1977-09-14 Data compression system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11079477A JPS5444418A (en) 1977-09-14 1977-09-14 Data compression system

Publications (1)

Publication Number Publication Date
JPS5444418A true JPS5444418A (en) 1979-04-07

Family

ID=14544794

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11079477A Pending JPS5444418A (en) 1977-09-14 1977-09-14 Data compression system

Country Status (1)

Country Link
JP (1) JPS5444418A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981000659A1 (en) * 1979-08-17 1981-03-05 Fujitsu Ltd Compressed data restoring system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981000659A1 (en) * 1979-08-17 1981-03-05 Fujitsu Ltd Compressed data restoring system
EP0034187A1 (en) * 1979-08-17 1981-08-26 Fujitsu Limited Compressed data restoring system
EP0034187B1 (en) * 1979-08-17 1984-07-04 Fujitsu Limited Compressed data restoring system
US4492983A (en) * 1979-08-17 1985-01-08 Fujitsu Limited System for decoding compressed data

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