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JPS54134918A - Coding system - Google Patents

Coding system

Info

Publication number
JPS54134918A
JPS54134918A JP4213378A JP4213378A JPS54134918A JP S54134918 A JPS54134918 A JP S54134918A JP 4213378 A JP4213378 A JP 4213378A JP 4213378 A JP4213378 A JP 4213378A JP S54134918 A JPS54134918 A JP S54134918A
Authority
JP
Japan
Prior art keywords
change picture
circuit
information change
scanning line
picture element
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
JP4213378A
Other languages
Japanese (ja)
Inventor
Masaaki Takizawa
Masachika Miyata
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP4213378A priority Critical patent/JPS54134918A/en
Publication of JPS54134918A publication Critical patent/JPS54134918A/en
Pending legal-status Critical Current

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  • Image Processing (AREA)

Abstract

PURPOSE: To make it possible to use the optimum facsimile-signal coding system for each line, by determining a coding system for signals of a scanning line at that time depending upon signals of the preceding scanning line.
CONSTITUTION: Register 7 is stored with the output of counting circuit 5 and the information on the relative distance to an information change picture element right before it, and runlength storage part 8 is with run-length information of information change picture element right before respective information change picture elements on the present coding scanning line and previous scanning line. From storage part 8, selector circuit 9 selects reference information change picture element equivalent to the information change picture element and stores it in registers 10 and 11. Comparators 12 and 13 compare the contents of resistor 7 with those of register 10, and 11 with 7, and the results are applied to variable-length coding circuit 14. The code output is supplied to the output terminal via information storage part 17 and output circuit 23. Here, dummy 25 is a circuit which inserts a redundant bit.
COPYRIGHT: (C)1979,JPO&Japio
JP4213378A 1978-04-12 1978-04-12 Coding system Pending JPS54134918A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4213378A JPS54134918A (en) 1978-04-12 1978-04-12 Coding system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4213378A JPS54134918A (en) 1978-04-12 1978-04-12 Coding system

Publications (1)

Publication Number Publication Date
JPS54134918A true JPS54134918A (en) 1979-10-19

Family

ID=12627430

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4213378A Pending JPS54134918A (en) 1978-04-12 1978-04-12 Coding system

Country Status (1)

Country Link
JP (1) JPS54134918A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57140071A (en) * 1981-01-30 1982-08-30 Ibm Image compressing device
JPS5932260A (en) * 1982-08-16 1984-02-21 Nec Corp Band compressing system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57140071A (en) * 1981-01-30 1982-08-30 Ibm Image compressing device
JPS5932260A (en) * 1982-08-16 1984-02-21 Nec Corp Band compressing system

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