JPS5546676A - Sequential coding system for boundary state - Google Patents

Sequential coding system for boundary state

Info

Publication number
JPS5546676A
JPS5546676A JP12081578A JP12081578A JPS5546676A JP S5546676 A JPS5546676 A JP S5546676A JP 12081578 A JP12081578 A JP 12081578A JP 12081578 A JP12081578 A JP 12081578A JP S5546676 A JPS5546676 A JP S5546676A
Authority
JP
Japan
Prior art keywords
state
boundary
signal
picture
picture elements
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
JP12081578A
Other languages
Japanese (ja)
Inventor
Takao Funahashi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP12081578A priority Critical patent/JPS5546676A/en
Publication of JPS5546676A publication Critical patent/JPS5546676A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To attain efficient coding by adding a distance code according to the fixed boundary state of a coding mode, and also to increase a processing speed by simplifying hardware constitution.
CONSTITUTION: A binary-coded input signal is compared with a one-line delay signal from memory 2, a pattern near a boundary is detected 3 depending upon the white or black state of the adjacent picture elements of the delay signal and input signal, and five boundary states are discriminated corresponding this detection signal to generate 4 a state signal and code. On the other hand, the length in a scanning direction where two picture elements with the input signal and delay signal adjoining each other are equal is counted 5 as the number of picture elements and that when the both are different is also counted 6 as the number of picture elements. In accordance with both the count values, the same-picture-element run length RL is coded in the 3rd boundary state as to signals in the 3rd and 5th boundary states, and the same picture element RL and different picture element RL are coded in sequence in the 5th state.
COPYRIGHT: (C)1980,JPO&Japio
JP12081578A 1978-09-29 1978-09-29 Sequential coding system for boundary state Pending JPS5546676A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12081578A JPS5546676A (en) 1978-09-29 1978-09-29 Sequential coding system for boundary state

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12081578A JPS5546676A (en) 1978-09-29 1978-09-29 Sequential coding system for boundary state

Publications (1)

Publication Number Publication Date
JPS5546676A true JPS5546676A (en) 1980-04-01

Family

ID=14795649

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12081578A Pending JPS5546676A (en) 1978-09-29 1978-09-29 Sequential coding system for boundary state

Country Status (1)

Country Link
JP (1) JPS5546676A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981000659A1 (en) * 1979-08-17 1981-03-05 Fujitsu Ltd Compressed data restoring system
JPS603276A (en) * 1983-06-20 1985-01-09 Sanyo Electric Co Ltd Encoding circuit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981000659A1 (en) * 1979-08-17 1981-03-05 Fujitsu Ltd Compressed data restoring system
EP0034187A1 (en) * 1979-08-17 1981-08-26 Fujitsu Limited Compressed data restoring system
EP0034187B1 (en) * 1979-08-17 1984-07-04 Fujitsu Limited Compressed data restoring system
US4492983A (en) * 1979-08-17 1985-01-08 Fujitsu Limited System for decoding compressed data
JPS603276A (en) * 1983-06-20 1985-01-09 Sanyo Electric Co Ltd Encoding circuit

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