GB2222739B - Image data compression system and facsimile machine employing the image data compression system - Google Patents

Image data compression system and facsimile machine employing the image data compression system

Info

Publication number
GB2222739B
GB2222739B GB8918001A GB8918001A GB2222739B GB 2222739 B GB2222739 B GB 2222739B GB 8918001 A GB8918001 A GB 8918001A GB 8918001 A GB8918001 A GB 8918001A GB 2222739 B GB2222739 B GB 2222739B
Authority
GB
United Kingdom
Prior art keywords
image data
data compression
compression system
facsimile machine
machine employing
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.)
Expired - Fee Related
Application number
GB8918001A
Other versions
GB2222739A (en
GB8918001D0 (en
Inventor
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
Publication of GB8918001D0 publication Critical patent/GB8918001D0/en
Publication of GB2222739A publication Critical patent/GB2222739A/en
Application granted granted Critical
Publication of GB2222739B publication Critical patent/GB2222739B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
GB8918001A 1988-08-08 1989-08-07 Image data compression system and facsimile machine employing the image data compression system Expired - Fee Related GB2222739B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19612688A JPH0246068A (en) 1988-08-08 1988-08-08 Picture data compressing system and facsimile equipment applying same

Publications (3)

Publication Number Publication Date
GB8918001D0 GB8918001D0 (en) 1989-09-20
GB2222739A GB2222739A (en) 1990-03-14
GB2222739B true GB2222739B (en) 1992-12-23

Family

ID=16352678

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8918001A Expired - Fee Related GB2222739B (en) 1988-08-08 1989-08-07 Image data compression system and facsimile machine employing the image data compression system

Country Status (2)

Country Link
JP (1) JPH0246068A (en)
GB (1) GB2222739B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992021101A1 (en) * 1991-05-17 1992-11-26 The Analytic Sciences Corporation Continuous-tone image compression
US5745606A (en) * 1995-10-11 1998-04-28 Yoshimichi; Kanda Method and system for storing information in compressed block data

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4040093A (en) * 1974-09-09 1977-08-02 Kokusai Denshin Denwa Kabushiki Kaisha System for coding information change picture elements in facsimile signal

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6024777A (en) * 1983-07-19 1985-02-07 Fujitsu Ltd Data compression system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4040093A (en) * 1974-09-09 1977-08-02 Kokusai Denshin Denwa Kabushiki Kaisha System for coding information change picture elements in facsimile signal

Also Published As

Publication number Publication date
GB2222739A (en) 1990-03-14
JPH0246068A (en) 1990-02-15
GB8918001D0 (en) 1989-09-20

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20020807