JPS54120521A - Data compression system - Google Patents

Data compression system

Info

Publication number
JPS54120521A
JPS54120521A JP2799878A JP2799878A JPS54120521A JP S54120521 A JPS54120521 A JP S54120521A JP 2799878 A JP2799878 A JP 2799878A JP 2799878 A JP2799878 A JP 2799878A JP S54120521 A JPS54120521 A JP S54120521A
Authority
JP
Japan
Prior art keywords
coding
address
scanning line
code
mode
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
JP2799878A
Other languages
Japanese (ja)
Inventor
Akira Konishi
Sho Taniguchi
Noboru Murayama
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 JP2799878A priority Critical patent/JPS54120521A/en
Publication of JPS54120521A publication Critical patent/JPS54120521A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To increase compressibility of a relative address coding system on a RAC system, etc., by attaining coding with a mode bit omitted after the 2nd address when the immediate address continues.
CONSTITUTION: The mode code of a specific pattern with a shift in pattern between a leading scanning line and a coded scanning line is fixed to "0" when the coding change point of the leading scanning line agree with that of the coded scanning line, to "100" when it shifts to the left by one picture element, and to "101" when it shifts to the right by one picture element; and the mode code is fixed to "11" in any other case and only in this case, this code is provided with run-length code F(M) as an immediate address, thereby compressing a picture signal. If the immediate address continues as to the above-mentioned coding, however, its mode code 11 is omitted after the 2nd address. Coding for K+1 lines by using this invented system is shown in the figure.
COPYRIGHT: (C)1979,JPO&Japio
JP2799878A 1978-03-11 1978-03-11 Data compression system Pending JPS54120521A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2799878A JPS54120521A (en) 1978-03-11 1978-03-11 Data compression system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2799878A JPS54120521A (en) 1978-03-11 1978-03-11 Data compression system

Publications (1)

Publication Number Publication Date
JPS54120521A true JPS54120521A (en) 1979-09-19

Family

ID=12236481

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2799878A Pending JPS54120521A (en) 1978-03-11 1978-03-11 Data compression system

Country Status (1)

Country Link
JP (1) JPS54120521A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4470072A (en) * 1979-10-17 1984-09-04 Matsushita Electric Industrial Co. Method of band compression

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4470072A (en) * 1979-10-17 1984-09-04 Matsushita Electric Industrial Co. Method of band compression

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