JPS5566175A - Redundancy suppression coding system - Google Patents

Redundancy suppression coding system

Info

Publication number
JPS5566175A
JPS5566175A JP13940678A JP13940678A JPS5566175A JP S5566175 A JPS5566175 A JP S5566175A JP 13940678 A JP13940678 A JP 13940678A JP 13940678 A JP13940678 A JP 13940678A JP S5566175 A JPS5566175 A JP S5566175A
Authority
JP
Japan
Prior art keywords
gradation
run
code
length
level
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
JP13940678A
Other languages
Japanese (ja)
Inventor
Hiroshi Ochi
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP13940678A priority Critical patent/JPS5566175A/en
Publication of JPS5566175A publication Critical patent/JPS5566175A/en
Pending legal-status Critical Current

Links

Landscapes

  • Image Processing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

PURPOSE: To suppress the redundancy of the picture including the intermediate gradation through a simple process by giving the run-length coding to the gradation level every time the gradation level has change of one gradation and furthermore setting and inserting the gradation change inverted code.
CONSTITUTION: The first picture element of each scan line is set to gradation level 0, and then the run-length codes of gradation levels 1, 2... are transferred in sequence. As gradation levels 0∼7 feature run-length 0, the code of run-length 0 is repeated 8 times. After this, the code of run-length 2 with gradation level 8, the code of run-length 0 with gradation level 9, the code of run-length 2 with gradation level 10 and so on are transferred in sequence. After transfer of the code of run- length 4 with gradation level 13, the gradation changes from increment to decrement. However, in this case, gradation level 13 does not proceed to level 14 but to level 12. At this instant, gradation change inverted code R is transmitted. The same procedure is given even in the case of the opposite change of the gradation. For the run-length code, the short code is allotted preferably to the one featuring a high emergence probability in order to decrease the transmission bit number as much as possible for every picture element.
COPYRIGHT: (C)1980,JPO&Japio
JP13940678A 1978-11-14 1978-11-14 Redundancy suppression coding system Pending JPS5566175A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13940678A JPS5566175A (en) 1978-11-14 1978-11-14 Redundancy suppression coding system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13940678A JPS5566175A (en) 1978-11-14 1978-11-14 Redundancy suppression coding system

Publications (1)

Publication Number Publication Date
JPS5566175A true JPS5566175A (en) 1980-05-19

Family

ID=15244506

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13940678A Pending JPS5566175A (en) 1978-11-14 1978-11-14 Redundancy suppression coding system

Country Status (1)

Country Link
JP (1) JPS5566175A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5673987A (en) * 1979-11-20 1981-06-19 Nec Corp Linear forecast data compression coding method between images
JPS56129482A (en) * 1980-03-15 1981-10-09 Keisatsuchiyou Chokan Compression system for gradation data
JPS5761380A (en) * 1980-09-30 1982-04-13 Ricoh Co Ltd Picture encoding system
JPS58197982A (en) * 1982-05-13 1983-11-17 Oki Electric Ind Co Ltd Still picture transmitting system
JPH08242448A (en) * 1994-12-28 1996-09-17 Toshiba Corp Encode and decode systems for image information

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5673987A (en) * 1979-11-20 1981-06-19 Nec Corp Linear forecast data compression coding method between images
JPS56129482A (en) * 1980-03-15 1981-10-09 Keisatsuchiyou Chokan Compression system for gradation data
JPS6359308B2 (en) * 1980-03-15 1988-11-18
JPS5761380A (en) * 1980-09-30 1982-04-13 Ricoh Co Ltd Picture encoding system
JPH0213511B2 (en) * 1980-09-30 1990-04-04 Ricoh Kk
JPS58197982A (en) * 1982-05-13 1983-11-17 Oki Electric Ind Co Ltd Still picture transmitting system
JPH08242448A (en) * 1994-12-28 1996-09-17 Toshiba Corp Encode and decode systems for image information

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