JPS54128616A - Information processor - Google Patents

Information processor

Info

Publication number
JPS54128616A
JPS54128616A JP3707878A JP3707878A JPS54128616A JP S54128616 A JPS54128616 A JP S54128616A JP 3707878 A JP3707878 A JP 3707878A JP 3707878 A JP3707878 A JP 3707878A JP S54128616 A JPS54128616 A JP S54128616A
Authority
JP
Japan
Prior art keywords
signal
length
brightness
picture
given
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
JP3707878A
Other languages
Japanese (ja)
Other versions
JPS639427B2 (en
Inventor
Sadasuke Kurabayashi
Yuzo Kato
Asao Watanabe
Shin Tsuda
Ryo Muto
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP3707878A priority Critical patent/JPS54128616A/en
Priority to US06/025,082 priority patent/US4229768A/en
Publication of JPS54128616A publication Critical patent/JPS54128616A/en
Publication of JPS639427B2 publication Critical patent/JPS639427B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To reduce the deterioration in the video quality with a simple constitution and to obtain high compression rate, by performing conversion processing for the signal belonging to the length of a given range toward main scanning direction to a given length of signal, and by coding it after conversion to the signal of other length.
CONSTITUTION: The preprocessing circuit E controls, from the two value video signals having two types of brightness obtained from the scanning of manuscript recording the picture, the inversion of signal from one or other brightness signal to another brightness signal, depending on the condition of the picture. Among the signal via the circuit E, the signal representing one brightness and belonging to the length within a given range to the main scanning direction is in conversion processing with a given length signal at the CT processing circuit E4, the output is fed to the band compression section B2 into other signal having a given length with coded compression, and is delivered to the telephone line LT2 with modulation C2. Accordingly, with a simple constitution, high compression rate can be obtained without reducing the deterioration of picture.
COPYRIGHT: (C)1979,JPO&Japio
JP3707878A 1978-03-30 1978-03-30 Information processor Granted JPS54128616A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP3707878A JPS54128616A (en) 1978-03-30 1978-03-30 Information processor
US06/025,082 US4229768A (en) 1978-03-30 1979-03-29 Information processing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3707878A JPS54128616A (en) 1978-03-30 1978-03-30 Information processor

Publications (2)

Publication Number Publication Date
JPS54128616A true JPS54128616A (en) 1979-10-05
JPS639427B2 JPS639427B2 (en) 1988-02-29

Family

ID=12487507

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3707878A Granted JPS54128616A (en) 1978-03-30 1978-03-30 Information processor

Country Status (1)

Country Link
JP (1) JPS54128616A (en)

Also Published As

Publication number Publication date
JPS639427B2 (en) 1988-02-29

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