JPS5450219A - Facsimile unit for two-dimensional run length information compression - Google Patents

Facsimile unit for two-dimensional run length information compression

Info

Publication number
JPS5450219A
JPS5450219A JP11564077A JP11564077A JPS5450219A JP S5450219 A JPS5450219 A JP S5450219A JP 11564077 A JP11564077 A JP 11564077A JP 11564077 A JP11564077 A JP 11564077A JP S5450219 A JPS5450219 A JP S5450219A
Authority
JP
Japan
Prior art keywords
information
output
line
bits
accumulated
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
JP11564077A
Other languages
Japanese (ja)
Inventor
Shoichiro Takayama
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 JP11564077A priority Critical patent/JPS5450219A/en
Publication of JPS5450219A publication Critical patent/JPS5450219A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To compress facsimile information efficiently by reading out information every vertical four or eight bits and discriminating whether vertical column information including black is equal to the preceding vertical column or not and coding this information to transmit.
CONSTITUTION: Four or eight-line components of the sensor output are accumlated in RAM31 in the transmission side, and are read out every vertical four or eight bits by micro μCPU33. Then, it is decide whether this read information is all white or not; and if it includes black, it is discriminated whether this information is equal to the preceding vertical column. Then, this information is coded and transmitted to a telephone line through modulator 32. Meawhile, the signal which has come from the telephone line is demodulated by demodulator 36 to become a digital signal and is accumulated in RAM37. Then, the output is read out by μCPU33 and is accumulated in RAM38 every four or eight bits, and this accumulated output is read out again line by line to drive XY matrix-type drivers 39 and 40 and write the output on receiving paper by write head 41. As a result, four or eight scanning lines are united for run length display, and facsimile information is efficiently compressed.
COPYRIGHT: (C)1979,JPO&Japio
JP11564077A 1977-09-28 1977-09-28 Facsimile unit for two-dimensional run length information compression Pending JPS5450219A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11564077A JPS5450219A (en) 1977-09-28 1977-09-28 Facsimile unit for two-dimensional run length information compression

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11564077A JPS5450219A (en) 1977-09-28 1977-09-28 Facsimile unit for two-dimensional run length information compression

Publications (1)

Publication Number Publication Date
JPS5450219A true JPS5450219A (en) 1979-04-20

Family

ID=14667639

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11564077A Pending JPS5450219A (en) 1977-09-28 1977-09-28 Facsimile unit for two-dimensional run length information compression

Country Status (1)

Country Link
JP (1) JPS5450219A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4955213A (en) * 1972-09-29 1974-05-29
JPS5046424A (en) * 1973-08-31 1975-04-25

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4955213A (en) * 1972-09-29 1974-05-29
JPS5046424A (en) * 1973-08-31 1975-04-25

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