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JPS5539956A - Character pattern data compression method - Google Patents

Character pattern data compression method

Info

Publication number
JPS5539956A
JPS5539956A JP11239978A JP11239978A JPS5539956A JP S5539956 A JPS5539956 A JP S5539956A JP 11239978 A JP11239978 A JP 11239978A JP 11239978 A JP11239978 A JP 11239978A JP S5539956 A JPS5539956 A JP S5539956A
Authority
JP
Japan
Prior art keywords
order
submatrix
character pattern
code
bit
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
JP11239978A
Other languages
Japanese (ja)
Other versions
JPS5946395B2 (en
Inventor
Katsumasa Shinozuka
Toshiyuki Sumita
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP11239978A priority Critical patent/JPS5946395B2/en
Publication of JPS5539956A publication Critical patent/JPS5539956A/en
Publication of JPS5946395B2 publication Critical patent/JPS5946395B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Digital Computer Display Output (AREA)

Abstract

PURPOSE:To encode the variable length by the occurrence frequency under the condition of the adjacent submatrix with respect to the individual matrix and decode easily to the character pattern by dividing the character pattern into a predetermined submatrix. CONSTITUTION:The character pattern represented by using the dot matrix of M rowXN column is divided into submatrix of m rowXn column and for the individual submatrix, the variable length encoding is carried out based upon the occurrence frequency under the condition of the adjacent submatrix. The patterns of the submatrix are arranged in order of the occurrence frequency and for the order 2 or smaller, the code of equal length to the order is assigned and for the order 3 or larger, the order is considered as 1 and i+1 (i is a odd number more than 3) code length is equalized and every the order is lowered by 2, the code length is increased by one bit and after the code, the bit showing the division and the code with bit for discriminating the order 1 and i/1 is assigned.
JP11239978A 1978-09-14 1978-09-14 Character pattern data compression method Expired JPS5946395B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11239978A JPS5946395B2 (en) 1978-09-14 1978-09-14 Character pattern data compression method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11239978A JPS5946395B2 (en) 1978-09-14 1978-09-14 Character pattern data compression method

Publications (2)

Publication Number Publication Date
JPS5539956A true JPS5539956A (en) 1980-03-21
JPS5946395B2 JPS5946395B2 (en) 1984-11-12

Family

ID=14585677

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11239978A Expired JPS5946395B2 (en) 1978-09-14 1978-09-14 Character pattern data compression method

Country Status (1)

Country Link
JP (1) JPS5946395B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57120154A (en) * 1981-01-19 1982-07-27 Kokusai Denshin Denwa Co Ltd <Kdd> Sequential variable length coding system
JPS62160487A (en) * 1986-01-08 1987-07-16 シャープ株式会社 Character pattern data compression
JPH0488443U (en) * 1990-12-07 1992-07-31

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57120154A (en) * 1981-01-19 1982-07-27 Kokusai Denshin Denwa Co Ltd <Kdd> Sequential variable length coding system
JPS6352812B2 (en) * 1981-01-19 1988-10-20 Kokusai Denshin Denwa Co Ltd
JPS62160487A (en) * 1986-01-08 1987-07-16 シャープ株式会社 Character pattern data compression
JPH0488443U (en) * 1990-12-07 1992-07-31

Also Published As

Publication number Publication date
JPS5946395B2 (en) 1984-11-12

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