FR2280139A1 - Dispositif de compression de donnees - Google Patents

Dispositif de compression de donnees

Info

Publication number
FR2280139A1
FR2280139A1 FR7513252A FR7513252A FR2280139A1 FR 2280139 A1 FR2280139 A1 FR 2280139A1 FR 7513252 A FR7513252 A FR 7513252A FR 7513252 A FR7513252 A FR 7513252A FR 2280139 A1 FR2280139 A1 FR 2280139A1
Authority
FR
France
Prior art keywords
data compression
compression device
data
compression
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.)
Withdrawn
Application number
FR7513252A
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.)
Motors Liquidation Co
Original Assignee
Motors Liquidation Co
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 Motors Liquidation Co filed Critical Motors Liquidation Co
Publication of FR2280139A1 publication Critical patent/FR2280139A1/fr
Withdrawn legal-status Critical Current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
    • H03M7/46—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
    • H03M7/48—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 alternating with other codes during the code conversion process, e.g. run-length coding being performed only as long as sufficientlylong runs of digits of the same kind are present
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M5/00—Conversion of the form of the representation of individual digits
    • H03M5/02—Conversion to or from representation by pulses
    • H03M5/04—Conversion to or from representation by pulses the pulses having two levels
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M5/00—Conversion of the form of the representation of individual digits
    • H03M5/02—Conversion to or from representation by pulses
    • H03M5/04—Conversion to or from representation by pulses the pulses having two levels
    • H03M5/14—Code representation, e.g. transition, for a given bit cell depending on the information in one or more adjacent bit cells, e.g. delay modulation code, double density code
    • H03M5/145—Conversion to or from block codes or representations thereof
    • 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
    • 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)
  • Dc Digital Transmission (AREA)
FR7513252A 1974-05-01 1975-04-28 Dispositif de compression de donnees Withdrawn FR2280139A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US465854A US3873977A (en) 1974-05-01 1974-05-01 Data compression method and apparatus

Publications (1)

Publication Number Publication Date
FR2280139A1 true FR2280139A1 (fr) 1976-02-20

Family

ID=23849441

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7513252A Withdrawn FR2280139A1 (fr) 1974-05-01 1975-04-28 Dispositif de compression de donnees

Country Status (4)

Country Link
US (1) US3873977A (fr)
JP (1) JPS50151012A (fr)
DE (1) DE2519353A1 (fr)
FR (1) FR2280139A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3949377A (en) * 1974-09-03 1976-04-06 Ultronic Systems Corporation Data storage and processing apparatus including processing of spacer characters
JPH07101482B2 (ja) * 1982-01-23 1995-11-01 ソニー株式会社 ディジタル信号記録装置
DE3247120C2 (de) * 1982-12-20 1985-09-12 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verfahren und Schaltungsanordnung zur Umsetzung eines zwischen zwei Pegeln wechselnden Binärsignals in ein Pulscodesignal, das Datenimpulse und Erneuerungsimpulse aufweist
US4626829A (en) * 1985-08-19 1986-12-02 Intelligent Storage Inc. Data compression using run length encoding and statistical encoding
US5532694A (en) * 1989-01-13 1996-07-02 Stac Electronics, Inc. Data compression apparatus and method using matching string searching and Huffman encoding
US5146221A (en) * 1989-01-13 1992-09-08 Stac, Inc. Data compression apparatus and method
US5488653A (en) * 1991-09-04 1996-01-30 Comsat Corporation Facsimile interface unit (FIU) enhanced capabilities negotiation
US5687176A (en) * 1995-06-09 1997-11-11 Hubbell Incorporated Zero byte substitution method and apparatus for telecommunications equipment
US20080027894A1 (en) * 2006-07-25 2008-01-31 Hitachi Global Storage Technologies Netherlands B.V. File system alteration of media files

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3691553A (en) * 1970-12-01 1972-09-12 Gen Motors Corp Method and apparatus for decoding digital information

Also Published As

Publication number Publication date
JPS50151012A (fr) 1975-12-04
US3873977A (en) 1975-03-25
DE2519353A1 (de) 1975-11-13

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Legal Events

Date Code Title Description
ST Notification of lapse