DE2940487A1 - Digitales faksimilesystem zur bandeinengung von halbton-bildsignalen - Google Patents

Digitales faksimilesystem zur bandeinengung von halbton-bildsignalen

Info

Publication number
DE2940487A1
DE2940487A1 DE19792940487 DE2940487A DE2940487A1 DE 2940487 A1 DE2940487 A1 DE 2940487A1 DE 19792940487 DE19792940487 DE 19792940487 DE 2940487 A DE2940487 A DE 2940487A DE 2940487 A1 DE2940487 A1 DE 2940487A1
Authority
DE
Germany
Prior art keywords
signal
image
level
code
digital
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
DE19792940487
Other languages
German (de)
English (en)
Other versions
DE2940487C2 (US07608600-20091027-C00054.png
Inventor
Hidekazu Sakurai
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.)
NEC Corp
Original Assignee
Nippon Electric 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
Priority claimed from JP12324078A external-priority patent/JPS5549069A/ja
Priority claimed from JP4178779A external-priority patent/JPS55134573A/ja
Application filed by Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Publication of DE2940487A1 publication Critical patent/DE2940487A1/de
Application granted granted Critical
Publication of DE2940487C2 publication Critical patent/DE2940487C2/de
Granted 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
DE19792940487 1978-10-05 1979-10-05 Digitales faksimilesystem zur bandeinengung von halbton-bildsignalen Granted DE2940487A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP12324078A JPS5549069A (en) 1978-10-05 1978-10-05 Digital facsimile equipment available for half-tone radiophoto transmission
JP4178779A JPS55134573A (en) 1979-04-06 1979-04-06 Digital facsimile equipment available for electric transmission of half tone

Publications (2)

Publication Number Publication Date
DE2940487A1 true DE2940487A1 (de) 1980-04-24
DE2940487C2 DE2940487C2 (US07608600-20091027-C00054.png) 1987-03-26

Family

ID=26381449

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19792940487 Granted DE2940487A1 (de) 1978-10-05 1979-10-05 Digitales faksimilesystem zur bandeinengung von halbton-bildsignalen

Country Status (3)

Country Link
US (1) US4353096A (US07608600-20091027-C00054.png)
DE (1) DE2940487A1 (US07608600-20091027-C00054.png)
GB (1) GB2035747B (US07608600-20091027-C00054.png)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3202155A1 (de) * 1981-01-23 1982-09-23 Ricoh Co., Ltd., Tokyo Digitales faksimile-uebertragungssystem
DE3240617A1 (de) * 1981-11-04 1983-05-11 Canon K.K., Tokyo Bilderzeugungsgeraet
DE3329045A1 (de) * 1982-08-11 1984-02-16 Ricoh Co., Ltd., Tokyo Faksimileuebertragung-steuerverfahren
DE3404436A1 (de) * 1983-02-14 1984-08-16 Canon K.K., Tokio/Tokyo Datenverarbeitungseinrichtung
DE3420753A1 (de) * 1983-06-03 1984-12-06 Kyodo News Service, Tokio/Tokyo Phototelegraphisches geraet
US9325343B2 (en) 2012-03-01 2016-04-26 General Electric Company Systems and methods for compression of high-frequency signals
US9559721B2 (en) 2012-03-01 2017-01-31 General Electric Company Systems and methods for compression of high-frequency signals

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5757084A (en) * 1980-09-24 1982-04-06 Hitachi Ltd Facsimile device
JPH0783427B2 (ja) * 1984-04-03 1995-09-06 キヤノン株式会社 画像伝送方法
US4661862A (en) * 1984-04-27 1987-04-28 Rca Corporation Differential PCM video transmission system employing horizontally offset five pixel groups and delta signals having plural non-linear encoding functions
US4814890A (en) * 1984-11-19 1989-03-21 Canon Kabushiki Kaisha Image communicating system
GB2172767B (en) * 1985-01-31 1989-02-08 Canon Kk Image signal processing system
JPH065889B2 (ja) * 1986-04-18 1994-01-19 富士写真フイルム株式会社 画像デ−タ圧縮処理方法
JPS6427369A (en) * 1987-07-22 1989-01-30 Sharp Kk Picture signal compression device
JP2535932B2 (ja) * 1987-07-29 1996-09-18 日本電気株式会社 中間調画像符号化装置
US4951155A (en) * 1987-11-23 1990-08-21 Stokes Imaging Services Apparatus and method for synchronizing videodisc images with audio signals
JPH04323963A (ja) * 1991-04-23 1992-11-13 Canon Inc 画像処理方法及び装置
US5734753A (en) * 1995-08-31 1998-03-31 Hewlett-Packard Company Partial pixel encoding and decoding method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2361234A1 (de) * 1972-12-11 1974-06-12 Ibm Schaltungsanordnung zur verdichtung von daten
DE2420991A1 (de) * 1973-05-11 1974-11-28 Cit Alcatel Vorrichtung zur binaerkodierung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5751310B2 (US07608600-20091027-C00054.png) * 1972-06-07 1982-11-01
JPS5726023B2 (US07608600-20091027-C00054.png) * 1972-10-04 1982-06-02
JPS5831791B2 (ja) * 1974-12-24 1983-07-08 オリンパス光学工業株式会社 画像情報帯域圧縮伝送装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2361234A1 (de) * 1972-12-11 1974-06-12 Ibm Schaltungsanordnung zur verdichtung von daten
DE2420991A1 (de) * 1973-05-11 1974-11-28 Cit Alcatel Vorrichtung zur binaerkodierung

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3202155A1 (de) * 1981-01-23 1982-09-23 Ricoh Co., Ltd., Tokyo Digitales faksimile-uebertragungssystem
DE3240617A1 (de) * 1981-11-04 1983-05-11 Canon K.K., Tokyo Bilderzeugungsgeraet
DE3329045A1 (de) * 1982-08-11 1984-02-16 Ricoh Co., Ltd., Tokyo Faksimileuebertragung-steuerverfahren
DE3404436A1 (de) * 1983-02-14 1984-08-16 Canon K.K., Tokio/Tokyo Datenverarbeitungseinrichtung
US4819079A (en) * 1983-02-14 1989-04-04 Canon Kabushiki Kaisha Data processing apparatus
DE3420753A1 (de) * 1983-06-03 1984-12-06 Kyodo News Service, Tokio/Tokyo Phototelegraphisches geraet
US9325343B2 (en) 2012-03-01 2016-04-26 General Electric Company Systems and methods for compression of high-frequency signals
US9559721B2 (en) 2012-03-01 2017-01-31 General Electric Company Systems and methods for compression of high-frequency signals
DK179177B1 (en) * 2012-03-01 2018-01-08 Gen Electric Systems and methods for compressing high frequency signals

Also Published As

Publication number Publication date
US4353096A (en) 1982-10-05
GB2035747B (en) 1983-03-23
DE2940487C2 (US07608600-20091027-C00054.png) 1987-03-26
GB2035747A (en) 1980-06-18

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Legal Events

Date Code Title Description
OAR Request for search filed
OC Search report available
8110 Request for examination paragraph 44
8125 Change of the main classification

Ipc: H04N 1/41

D2 Grant after examination
8364 No opposition during term of opposition
8328 Change in the person/name/address of the agent

Free format text: VOSSIUS, V., DIPL.-CHEM. DR.RER.NAT. TAUCHNER, P., DIPL.-CHEM. DR.RER.NAT. HEUNEMANN, D., DIPL.-PHYS. DR.RER.NAT. RAUH, P., DIPL.-CHEM. DR.RER.NAT., PAT.-ANWAELTE, 8000 MUENCHEN

8328 Change in the person/name/address of the agent

Free format text: TAUCHNER, P., DIPL.-CHEM. DR.RER.NAT. HEUNEMANN, D., DIPL.-PHYS. DR.RER.NAT. RAUH, P., DIPL.-CHEM. DR.RER.NAT., PAT.-ANWAELTE, 8000 MUENCHEN

8339 Ceased/non-payment of the annual fee