GB1438469A - System for compacting digital data - Google Patents

System for compacting digital data

Info

Publication number
GB1438469A
GB1438469A GB1452474A GB1452474A GB1438469A GB 1438469 A GB1438469 A GB 1438469A GB 1452474 A GB1452474 A GB 1452474A GB 1452474 A GB1452474 A GB 1452474A GB 1438469 A GB1438469 A GB 1438469A
Authority
GB
United Kingdom
Prior art keywords
digital data
compacting
compacting digital
data
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.)
Expired
Application number
GB1452474A
Other languages
English (en)
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1438469A publication Critical patent/GB1438469A/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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T1/00—General purpose image data processing
    • G06T1/0007—Image acquisition
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • G06T9/004—Predictors, e.g. intraframe, interframe coding
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/30—Individual registration on entry or exit not involving the use of a pass
    • G07C9/32—Individual registration on entry or exit not involving the use of a pass in combination with an identity check
    • G07C9/35—Individual registration on entry or exit not involving the use of a pass in combination with an identity check by means of a handwritten signature
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/46—Conversion to or from run-length codes, i.e. by representing the number of consecutive digits, or groups of digits, of the same kind by a code word and a digit indicative of that kind

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)
GB1452474A 1973-04-17 1974-04-02 System for compacting digital data Expired GB1438469A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NLAANVRAGE7305334,A NL172799C (nl) 1973-04-17 1973-04-17 Stelsel voor het verwerken van informatie afkomstig van handgeschreven tekst.

Publications (1)

Publication Number Publication Date
GB1438469A true GB1438469A (en) 1976-06-09

Family

ID=19818664

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1452474A Expired GB1438469A (en) 1973-04-17 1974-04-02 System for compacting digital data

Country Status (6)

Country Link
JP (1) JPS5010908A (US20110009641A1-20110113-C00185.png)
DE (1) DE2413090A1 (US20110009641A1-20110113-C00185.png)
FR (1) FR2226709B1 (US20110009641A1-20110113-C00185.png)
GB (1) GB1438469A (US20110009641A1-20110113-C00185.png)
IT (1) IT1006312B (US20110009641A1-20110113-C00185.png)
NL (1) NL172799C (US20110009641A1-20110113-C00185.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0040025A1 (en) * 1980-05-13 1981-11-18 Am International Incorporated Real time data compression/decompression scheme for facsimile transmission system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4101959A (en) * 1976-10-22 1978-07-18 Informer, Inc. Terminal display and storage system
US5057869A (en) * 1990-11-30 1991-10-15 Xerox Corporation System for scanning signature pages

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3225333A (en) * 1961-12-28 1965-12-21 Ibm Differential quantitized storage and compression
US3718908A (en) * 1970-11-30 1973-02-27 R Bloomstein Signature storage and retrieval system
US3676000A (en) * 1970-12-31 1972-07-11 Coded Signatures Inc Data encoding and decoding apparatus and method
JPS5123408B1 (US20110009641A1-20110113-C00185.png) * 1971-07-10 1976-07-16

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0040025A1 (en) * 1980-05-13 1981-11-18 Am International Incorporated Real time data compression/decompression scheme for facsimile transmission system

Also Published As

Publication number Publication date
FR2226709B1 (US20110009641A1-20110113-C00185.png) 1976-06-25
JPS5010908A (US20110009641A1-20110113-C00185.png) 1975-02-04
IT1006312B (it) 1976-09-30
DE2413090A1 (de) 1974-11-07
FR2226709A1 (US20110009641A1-20110113-C00185.png) 1974-11-15
NL7305334A (US20110009641A1-20110113-C00185.png) 1974-10-21
NL172799C (nl) 1983-10-17
NL172799B (nl) 1983-05-16

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Legal Events

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