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DE69023329D1 - Vorrichtung zur adaptiven datenkompression für ein bandantriebssystem. - Google Patents

Vorrichtung zur adaptiven datenkompression für ein bandantriebssystem.

Info

Publication number
DE69023329D1
DE69023329D1 DE69023329T DE69023329T DE69023329D1 DE 69023329 D1 DE69023329 D1 DE 69023329D1 DE 69023329 T DE69023329 T DE 69023329T DE 69023329 T DE69023329 T DE 69023329T DE 69023329 D1 DE69023329 D1 DE 69023329D1
Authority
DE
Germany
Prior art keywords
drive system
data compression
tape drive
adaptive data
adaptive
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
DE69023329T
Other languages
English (en)
Other versions
DE69023329T2 (de
Inventor
John O'brien
Neil Thomas
Tracy Dyer
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.)
Storage Technology Corp
Original Assignee
Storage Technology 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 Storage Technology Corp filed Critical Storage Technology Corp
Application granted granted Critical
Publication of DE69023329D1 publication Critical patent/DE69023329D1/de
Publication of DE69023329T2 publication Critical patent/DE69023329T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
    • H03M13/09—Error detection only, e.g. using cyclic redundancy check [CRC] codes or single parity bit
    • H03M13/091—Parallel or block-wise CRC computation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G11B20/1833—Error detection or correction; Testing, e.g. of drop-outs by adding special lists or symbols to the coded information
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computing Systems (AREA)
  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Signal Processing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
DE69023329T 1989-02-09 1990-02-08 Vorrichtung zur adaptiven datenkompression für ein bandantriebssystem. Expired - Fee Related DE69023329T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/308,767 US4929946A (en) 1989-02-09 1989-02-09 Adaptive data compression apparatus including run length encoding for a tape drive system
PCT/US1990/000728 WO1990009705A1 (en) 1989-02-09 1990-02-08 Adaptive data compression apparatus for a tape drive system

Publications (2)

Publication Number Publication Date
DE69023329D1 true DE69023329D1 (de) 1995-12-07
DE69023329T2 DE69023329T2 (de) 1996-05-15

Family

ID=23195314

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69023329T Expired - Fee Related DE69023329T2 (de) 1989-02-09 1990-02-08 Vorrichtung zur adaptiven datenkompression für ein bandantriebssystem.

Country Status (5)

Country Link
US (1) US4929946A (de)
EP (1) EP0457840B1 (de)
JP (1) JP2915568B2 (de)
DE (1) DE69023329T2 (de)
WO (1) WO1990009705A1 (de)

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Also Published As

Publication number Publication date
EP0457840A1 (de) 1991-11-27
DE69023329T2 (de) 1996-05-15
JPH04503421A (ja) 1992-06-18
JP2915568B2 (ja) 1999-07-05
EP0457840A4 (en) 1992-10-21
EP0457840B1 (de) 1995-11-02
US4929946A (en) 1990-05-29
WO1990009705A1 (en) 1990-08-23

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