GB2109204B - Data compression - Google Patents

Data compression

Info

Publication number
GB2109204B
GB2109204B GB08229520A GB8229520A GB2109204B GB 2109204 B GB2109204 B GB 2109204B GB 08229520 A GB08229520 A GB 08229520A GB 8229520 A GB8229520 A GB 8229520A GB 2109204 B GB2109204 B GB 2109204B
Authority
GB
United Kingdom
Prior art keywords
data compression
compression
data
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
GB08229520A
Other versions
GB2109204A (en
Inventor
Pierre A Humblet
Steven G Finn
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.)
Motorola Solutions Inc
Original Assignee
Codex 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 Codex Corp filed Critical Codex Corp
Publication of GB2109204A publication Critical patent/GB2109204A/en
Application granted granted Critical
Publication of GB2109204B publication Critical patent/GB2109204B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03M7/40—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code
    • H03M7/42—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code using table look-up for the coding or decoding process, e.g. using read-only memory

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
GB08229520A 1981-10-15 1982-10-15 Data compression Expired GB2109204B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US31174481A 1981-10-15 1981-10-15
US31187781A 1981-10-15 1981-10-15

Publications (2)

Publication Number Publication Date
GB2109204A GB2109204A (en) 1983-05-25
GB2109204B true GB2109204B (en) 1986-05-29

Family

ID=26978045

Family Applications (3)

Application Number Title Priority Date Filing Date
GB08229520A Expired GB2109204B (en) 1981-10-15 1982-10-15 Data compression
GB08502324A Expired GB2152252B (en) 1981-10-15 1985-01-30 Data compression
GB08502325A Expired GB2152253B (en) 1981-10-15 1985-01-30 Data compression

Family Applications After (2)

Application Number Title Priority Date Filing Date
GB08502324A Expired GB2152252B (en) 1981-10-15 1985-01-30 Data compression
GB08502325A Expired GB2152253B (en) 1981-10-15 1985-01-30 Data compression

Country Status (4)

Country Link
AU (4) AU555476B2 (en)
DE (1) DE3238130A1 (en)
FR (1) FR2514969B1 (en)
GB (3) GB2109204B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5045853A (en) * 1987-06-17 1991-09-03 Intel Corporation Method and apparatus for statistically encoding digital data
US4926482A (en) * 1987-06-26 1990-05-15 Unisys Corp. Apparatus and method for real time data compressor
US4967196A (en) * 1988-03-31 1990-10-30 Intel Corporation Apparatus for decoding variable-length encoded data
US5371499A (en) * 1992-02-28 1994-12-06 Intersecting Concepts, Inc. Data compression using hashing
GB2321375B (en) * 1997-01-21 2002-02-27 Fujitsu Ltd Data encoding method and apparatus and data decoding method and apparatus
GB2367223B (en) * 1997-01-21 2002-05-15 Fujitsu Ltd Data encoding method and apparatus and data decoding method and apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU503988B2 (en) * 1975-11-25 1979-09-27 Rudolf Hell Gmbh Digital programme length coding with redundancy reduction forthe transmission of binary coded image information
US4168513A (en) * 1977-09-12 1979-09-18 Xerox Corporation Regenerative decoding of binary data using minimum redundancy codes
JPS5755669A (en) * 1980-09-05 1982-04-02 Ibm Dynamic data compressing system

Also Published As

Publication number Publication date
GB2152252A (en) 1985-07-31
AU575722B2 (en) 1988-08-04
GB8502324D0 (en) 1985-02-27
GB2109204A (en) 1983-05-25
AU575723B2 (en) 1988-08-04
AU8932882A (en) 1983-04-21
GB2152253B (en) 1986-05-21
AU5677786A (en) 1986-09-18
AU5677986A (en) 1986-09-18
GB8502325D0 (en) 1985-02-27
GB2152252B (en) 1986-05-21
AU555476B2 (en) 1986-09-25
DE3238130A1 (en) 1983-06-23
AU5677886A (en) 1986-09-18
GB2152253A (en) 1985-07-31
FR2514969A1 (en) 1983-04-22
FR2514969B1 (en) 1989-02-03

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Legal Events

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

Effective date: 19981015