JPS5526704A - Two-dimentional sequential coding system - Google Patents

Two-dimentional sequential coding system

Info

Publication number
JPS5526704A
JPS5526704A JP9253378A JP9253378A JPS5526704A JP S5526704 A JPS5526704 A JP S5526704A JP 9253378 A JP9253378 A JP 9253378A JP 9253378 A JP9253378 A JP 9253378A JP S5526704 A JPS5526704 A JP S5526704A
Authority
JP
Japan
Prior art keywords
signal
circuit
counting
outputted
codes
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
JP9253378A
Other languages
Japanese (ja)
Other versions
JPS5923514B2 (en
Inventor
Yasuhiro Yamazaki
Yasushi Wakahara
Kanko Yuki
Toyomichi Yamada
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
KDDI Corp
Original Assignee
Kokusai Denshin Denwa KK
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 Kokusai Denshin Denwa KK, Nippon Telegraph and Telephone Corp filed Critical Kokusai Denshin Denwa KK
Priority to JP53092533A priority Critical patent/JPS5923514B2/en
Priority to CA331,897A priority patent/CA1128645A/en
Priority to NL7905654A priority patent/NL192420C/en
Priority to AU49146/79A priority patent/AU516743B2/en
Priority to FR7919267A priority patent/FR2432807B1/en
Priority to US06/062,036 priority patent/US4245257A/en
Priority to DE2930903A priority patent/DE2930903C2/en
Priority to GB7926581A priority patent/GB2030425B/en
Publication of JPS5526704A publication Critical patent/JPS5526704A/en
Priority to CA000400498A priority patent/CA1144274A/en
Publication of JPS5923514B2 publication Critical patent/JPS5923514B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/41—Bandwidth or redundancy reduction
    • H04N1/411—Bandwidth or redundancy reduction for the transmission or storage or reproduction of two-tone pictures, e.g. black and white pictures
    • H04N1/413—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information
    • H04N1/417—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information using predictive or differential encoding
    • H04N1/4175—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information using predictive or differential encoding involving the encoding of tone transitions with respect to tone transitions in a reference line

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)

Abstract

PURPOSE: To compress by a large margin the volume of codes which should be sent out, by removing the redundancy of a facsimile signal.
CONSTITUTION: A facsimile signal for one line is inputted from input terminal 1 to memory 2. A signal for a reference line is imputted to memory 3 for it. Under the control of circuit 5, data in memories 2 and 3 are sequentially read out at the same time from the position of initial-point picture element (a0). By making a comparison between the above-mentioned read signal and the signal just before it, picture- element change detection circuits 11 and 12 send a signal of "0" when their levels are equal or a signal of "1" when not. On detecting a change in picture element, circuit 11 sends an output of "1" to (a1) detection circuit 21 and counter 32 in process of counting from the point in time of (a0) setting stops and sends its count value to coding circuit 52. Circuit 53 receives a signal from counter 33 which starts counting by either preceding signal of (b1) or (a1) and stops counting by the other and this signal is passed through gates 71 and 72 and then converted by circuit 90 into a string of codes to be outputted, which is outputted 100.
COPYRIGHT: (C)1980,JPO&Japio
JP53092533A 1978-07-31 1978-07-31 Two-dimensional sequential encoding method Expired JPS5923514B2 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
JP53092533A JPS5923514B2 (en) 1978-07-31 1978-07-31 Two-dimensional sequential encoding method
CA331,897A CA1128645A (en) 1978-07-31 1979-07-16 Transmission method and system for facsimile signal
NL7905654A NL192420C (en) 1978-07-31 1979-07-20 Method and device for transmission of facsimile signals.
AU49146/79A AU516743B2 (en) 1978-07-31 1979-07-23 Facsimile transmission system
FR7919267A FR2432807B1 (en) 1978-07-31 1979-07-26 METHOD AND SYSTEM FOR TRANSMITTING IMAGE SIGNALS
US06/062,036 US4245257A (en) 1978-07-31 1979-07-30 Transmission method and system for facsimile signal
DE2930903A DE2930903C2 (en) 1978-07-31 1979-07-30 Method and apparatus for transmitting facsimile signals
GB7926581A GB2030425B (en) 1978-07-31 1979-07-31 Transmission method and system for facsimile signal
CA000400498A CA1144274A (en) 1978-07-31 1982-04-05 Transmission method and system for facsimile signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53092533A JPS5923514B2 (en) 1978-07-31 1978-07-31 Two-dimensional sequential encoding method

Publications (2)

Publication Number Publication Date
JPS5526704A true JPS5526704A (en) 1980-02-26
JPS5923514B2 JPS5923514B2 (en) 1984-06-02

Family

ID=14056990

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53092533A Expired JPS5923514B2 (en) 1978-07-31 1978-07-31 Two-dimensional sequential encoding method

Country Status (2)

Country Link
JP (1) JPS5923514B2 (en)
AU (1) AU516743B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58101562A (en) * 1981-12-14 1983-06-16 Ricoh Co Ltd Facsimile deivce
JPS58101563A (en) * 1981-12-14 1983-06-16 Ricoh Co Ltd Facsimile device
JPH03115584A (en) * 1989-09-28 1991-05-16 Okuno Seiyaku Kogyo Kk Method for plating polycarbonate resin
JPH07297520A (en) * 1994-04-20 1995-11-10 Nec Corp Manufacture of printed wiring board

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5258406A (en) * 1975-11-10 1977-05-13 Kokusai Denshin Denwa Co Ltd Facsimile signal change point address coding system
JPS5290217A (en) * 1976-01-24 1977-07-29 Nippon Telegr & Teleph Corp <Ntt> Transmission system with coded redundancy inhibition
JPS532025A (en) * 1976-06-28 1978-01-10 Nippon Telegr & Teleph Corp <Ntt> Redundancy suppression coding transmission system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5258406A (en) * 1975-11-10 1977-05-13 Kokusai Denshin Denwa Co Ltd Facsimile signal change point address coding system
JPS5290217A (en) * 1976-01-24 1977-07-29 Nippon Telegr & Teleph Corp <Ntt> Transmission system with coded redundancy inhibition
JPS532025A (en) * 1976-06-28 1978-01-10 Nippon Telegr & Teleph Corp <Ntt> Redundancy suppression coding transmission system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58101562A (en) * 1981-12-14 1983-06-16 Ricoh Co Ltd Facsimile deivce
JPS58101563A (en) * 1981-12-14 1983-06-16 Ricoh Co Ltd Facsimile device
JPH03115584A (en) * 1989-09-28 1991-05-16 Okuno Seiyaku Kogyo Kk Method for plating polycarbonate resin
JPH0530911B2 (en) * 1989-09-28 1993-05-11 Okuno Chem Ind Co
JPH07297520A (en) * 1994-04-20 1995-11-10 Nec Corp Manufacture of printed wiring board

Also Published As

Publication number Publication date
AU516743B2 (en) 1981-06-18
JPS5923514B2 (en) 1984-06-02
AU4914679A (en) 1980-02-07

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