JPS5513574A - Data coding system - Google Patents

Data coding system

Info

Publication number
JPS5513574A
JPS5513574A JP8635578A JP8635578A JPS5513574A JP S5513574 A JPS5513574 A JP S5513574A JP 8635578 A JP8635578 A JP 8635578A JP 8635578 A JP8635578 A JP 8635578A JP S5513574 A JPS5513574 A JP S5513574A
Authority
JP
Japan
Prior art keywords
code
coded
code table
data
output
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
JP8635578A
Other languages
Japanese (ja)
Inventor
Kaoru Konno
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 JP8635578A priority Critical patent/JPS5513574A/en
Publication of JPS5513574A publication Critical patent/JPS5513574A/en
Pending legal-status Critical Current

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  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

PURPOSE: To improve the lowering of a compression rate in case that a coded code is extracted from a code table, by changing the code table for picture information to make the number of code bits small when data of a facsimile is coded.
CONSTITUTION: When data of a facsimile is coded, the tip of original 1 is detected by micro switch 2, and the optical image dependent upon flash circuit 3 is projected to photoelectric converter 5, and analogue signals corresponding to the picture level dependent upon this projection are supplied to comparator COM1 to output a binary signal indicating whether they are higher than comparison voltage Vr2 or not. This binary signal is converted to a code table selection code by encoder EC1 and is given to data selector DSE. Then, the output obtained by setting the input of a mode set switch by an operator is given to encoder EC2, and the output of data selector DES is supplied to the CPU of coder 6 through latch LU1, and the number of code bits of picture information is made small, thereby improving the compression rate in case of the read from the code table.
COPYRIGHT: (C)1980,JPO&Japio
JP8635578A 1978-07-15 1978-07-15 Data coding system Pending JPS5513574A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8635578A JPS5513574A (en) 1978-07-15 1978-07-15 Data coding system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8635578A JPS5513574A (en) 1978-07-15 1978-07-15 Data coding system

Publications (1)

Publication Number Publication Date
JPS5513574A true JPS5513574A (en) 1980-01-30

Family

ID=13884573

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8635578A Pending JPS5513574A (en) 1978-07-15 1978-07-15 Data coding system

Country Status (1)

Country Link
JP (1) JPS5513574A (en)

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