GB1590664A - Data compression - Google Patents

Data compression Download PDF

Info

Publication number
GB1590664A
GB1590664A GB5393677A GB5393677A GB1590664A GB 1590664 A GB1590664 A GB 1590664A GB 5393677 A GB5393677 A GB 5393677A GB 5393677 A GB5393677 A GB 5393677A GB 1590664 A GB1590664 A GB 1590664A
Authority
GB
United Kingdom
Prior art keywords
picture elements
codes
data
run length
message
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
GB5393677A
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.)
Xerox Corp
Original Assignee
Xerox 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
Priority claimed from US05/755,313 external-priority patent/US4092665A/en
Priority claimed from US05/756,663 external-priority patent/US4092675A/en
Priority claimed from US05/756,662 external-priority patent/US4092677A/en
Priority claimed from US05/756,664 external-priority patent/US4136363A/en
Priority claimed from US05/755,309 external-priority patent/US4092676A/en
Application filed by Xerox Corp filed Critical Xerox Corp
Publication of GB1590664A publication Critical patent/GB1590664A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • G06T9/005—Statistical coding, e.g. Huffman, run length coding
    • 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)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Image Processing (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
GB5393677A 1976-12-29 1977-12-28 Data compression Expired GB1590664A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US05/755,313 US4092665A (en) 1976-12-29 1976-12-29 Method and means for extracting variable length data from fixed length bytes
US05/756,663 US4092675A (en) 1976-12-29 1976-12-29 Truncated run length encoding with a modular variable length code format
US05/756,662 US4092677A (en) 1976-12-29 1976-12-29 Truncated run length encoding for fractionally difference modulated video signals
US05/756,664 US4136363A (en) 1976-12-29 1976-12-29 Truncated run length encoding
US05/755,309 US4092676A (en) 1976-12-29 1976-12-29 Block length multiple plus run length residue codes for run length encoding

Publications (1)

Publication Number Publication Date
GB1590664A true GB1590664A (en) 1981-06-03

Family

ID=27542168

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5393677A Expired GB1590664A (en) 1976-12-29 1977-12-28 Data compression

Country Status (4)

Country Link
JP (1) JPS5384411A (enrdf_load_stackoverflow)
CA (1) CA1118091A (enrdf_load_stackoverflow)
DE (1) DE2758399C2 (enrdf_load_stackoverflow)
GB (1) GB1590664A (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5537003A (en) * 1978-09-07 1980-03-14 Hitachi Ltd Facsimile transmitter having redundancy suppression function
CA1211300A (en) * 1983-03-02 1986-09-16 Thomas H. Lohr Bevel gear drive
US4517604A (en) * 1983-04-04 1985-05-14 International Business Machines Corporation Method for reducing line width variations in bilevel video images

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3869569A (en) * 1972-05-16 1975-03-04 Xerox Corp Facsimile transceiving apparatus
JPS4938510A (enrdf_load_stackoverflow) * 1972-08-09 1974-04-10
US3830966A (en) * 1973-01-03 1974-08-20 Eg & G Inc Apparatus and method for transmitting a bandwidth compressed digital signal representation of a visible image
JPS5123408A (ja) * 1974-07-24 1976-02-25 Nippon Steel Corp Kogyoyorohoshujiniokeru ronaikankisochi

Also Published As

Publication number Publication date
DE2758399A1 (de) 1978-07-13
JPS6228628B2 (enrdf_load_stackoverflow) 1987-06-22
CA1118091A (en) 1982-02-09
JPS5384411A (en) 1978-07-25
DE2758399C2 (de) 1986-04-10

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Publication Publication Date Title
US4092665A (en) Method and means for extracting variable length data from fixed length bytes
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JPH0211064B2 (enrdf_load_stackoverflow)
US4353096A (en) Digital facsimile system to band-compress half-tone picture signals
US4366506A (en) Picture transfer method and apparatus therefor
US4096527A (en) Run length encoding and decoding methods and means
US4092676A (en) Block length multiple plus run length residue codes for run length encoding
JP4057650B2 (ja) 大ギャップを有するスライド窓データ圧縮システム
US4092675A (en) Truncated run length encoding with a modular variable length code format
JPH0424907B2 (enrdf_load_stackoverflow)
US4092677A (en) Truncated run length encoding for fractionally difference modulated video signals
US4511213A (en) Coding method for multilevel-gradated picture signal
US4918540A (en) System for encoding or decoding analog video signals
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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee