DE60009502T2 - Lzw datenkomprimierung/dekomprimierungsgerät und - verfahren mit eingebetteter lauflängenkodierung/dekodierung - Google Patents

Lzw datenkomprimierung/dekomprimierungsgerät und - verfahren mit eingebetteter lauflängenkodierung/dekodierung Download PDF

Info

Publication number
DE60009502T2
DE60009502T2 DE60009502T DE60009502T DE60009502T2 DE 60009502 T2 DE60009502 T2 DE 60009502T2 DE 60009502 T DE60009502 T DE 60009502T DE 60009502 T DE60009502 T DE 60009502T DE 60009502 T2 DE60009502 T2 DE 60009502T2
Authority
DE
Germany
Prior art keywords
code
run
count
data
lzw
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 - Lifetime
Application number
DE60009502T
Other languages
German (de)
English (en)
Other versions
DE60009502D1 (de
Inventor
C. Albert COOPER
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.)
Unisys Corp
Original Assignee
Unisys 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 Unisys Corp filed Critical Unisys Corp
Application granted granted Critical
Publication of DE60009502D1 publication Critical patent/DE60009502D1/de
Publication of DE60009502T2 publication Critical patent/DE60009502T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • H03M7/3084—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction using adaptive string matching, e.g. the Lempel-Ziv method
    • H03M7/3088—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction using adaptive string matching, e.g. the Lempel-Ziv method employing the use of a dictionary, e.g. LZ78

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
DE60009502T 1999-06-19 2000-06-15 Lzw datenkomprimierung/dekomprimierungsgerät und - verfahren mit eingebetteter lauflängenkodierung/dekodierung Expired - Lifetime DE60009502T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US336219 1999-06-19
US09/336,219 US6169499B1 (en) 1999-06-19 1999-06-19 LZW data compression/decompression apparatus and method with embedded run-length encoding/decoding
PCT/US2000/016509 WO2000079687A1 (en) 1999-06-19 2000-06-15 Lzw data compression/decompression apparatus and method with embedded run-length encoding/decoding

Publications (2)

Publication Number Publication Date
DE60009502D1 DE60009502D1 (de) 2004-05-06
DE60009502T2 true DE60009502T2 (de) 2005-04-14

Family

ID=23315088

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60009502T Expired - Lifetime DE60009502T2 (de) 1999-06-19 2000-06-15 Lzw datenkomprimierung/dekomprimierungsgerät und - verfahren mit eingebetteter lauflängenkodierung/dekodierung

Country Status (7)

Country Link
US (1) US6169499B1 (enExample)
EP (1) EP1195010B1 (enExample)
JP (1) JP2003502930A (enExample)
AU (1) AU5874900A (enExample)
CA (1) CA2374389C (enExample)
DE (1) DE60009502T2 (enExample)
WO (1) WO2000079687A1 (enExample)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6216175B1 (en) * 1998-06-08 2001-04-10 Microsoft Corporation Method for upgrading copies of an original file with same update data after normalizing differences between copies created during respective original installations
US6624761B2 (en) 1998-12-11 2003-09-23 Realtime Data, Llc Content independent data compression method and system
US6601104B1 (en) 1999-03-11 2003-07-29 Realtime Data Llc System and methods for accelerated data storage and retrieval
US6188333B1 (en) * 1999-08-12 2001-02-13 Unisys Corporation LZW data compression apparatus and method using look-ahead mathematical run processing
GB0001707D0 (en) * 2000-01-25 2000-03-15 Btg Int Ltd Data compression having more effective compression
US6748457B2 (en) 2000-02-03 2004-06-08 Realtime Data, Llc Data storewidth accelerator
US6307488B1 (en) * 2000-05-04 2001-10-23 Unisys Corporation LZW data compression and decompression apparatus and method using grouped data characters to reduce dictionary accesses
US6968012B1 (en) * 2000-10-02 2005-11-22 Firepad, Inc. Methods for encoding digital video for decoding on low performance devices
US8692695B2 (en) 2000-10-03 2014-04-08 Realtime Data, Llc Methods for encoding and decoding data
US9143546B2 (en) 2000-10-03 2015-09-22 Realtime Data Llc System and method for data feed acceleration and encryption
US7386046B2 (en) 2001-02-13 2008-06-10 Realtime Data Llc Bandwidth sensitive data compression and decompression
US6426711B1 (en) * 2001-05-14 2002-07-30 Unisys Corporation Character table implemented data compression method and apparatus
US20030088537A1 (en) * 2001-08-08 2003-05-08 Nec Eluminant Technologies, Inc. High speed data compression and decompression apparatus and method
US6466144B1 (en) * 2001-11-30 2002-10-15 Unisys Corporation Data decompressor for use with a data compressor implemented with limited length character tables and compact string codes
KR100532275B1 (ko) * 2002-12-11 2005-11-29 삼성전자주식회사 이미지 압축방법
US6756923B1 (en) * 2003-05-30 2004-06-29 Unisys Corporation Data compressor utilizing switched input coincidence elements arranged in virtual levels
CN106549672B (zh) * 2016-10-31 2019-07-12 合肥移顺信息技术有限公司 一种加速度传感器的三轴数据压缩方法
CN109857463B (zh) * 2019-01-30 2020-12-01 上海兆芯集成电路有限公司 加速压缩方法以及加速压缩装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4558302A (en) 1983-06-20 1985-12-10 Sperry Corporation High speed data compression and decompression apparatus and method
US4929946A (en) 1989-02-09 1990-05-29 Storage Technology Corporation Adaptive data compression apparatus including run length encoding for a tape drive system
US4971407A (en) 1989-08-09 1990-11-20 Unisys Corp. Two stage run and string data compressor providing doubly compressed output
US4988998A (en) 1989-09-05 1991-01-29 Storage Technology Corporation Data compression system for successively applying at least two data compression methods to an input data stream
US5247638A (en) 1990-06-18 1993-09-21 Storage Technology Corporation Apparatus for compressing data in a dynamically mapped virtual data storage subsystem
US5389922A (en) 1993-04-13 1995-02-14 Hewlett-Packard Company Compression using small dictionaries with applications to network packets
GB2301252A (en) * 1995-05-23 1996-11-27 Ibm Run length data compression
US5861827A (en) 1996-07-24 1999-01-19 Unisys Corporation Data compression and decompression system with immediate dictionary updating interleaved with string search

Also Published As

Publication number Publication date
JP2003502930A (ja) 2003-01-21
AU5874900A (en) 2001-01-09
US6169499B1 (en) 2001-01-02
EP1195010A1 (en) 2002-04-10
EP1195010B1 (en) 2004-03-31
WO2000079687A1 (en) 2000-12-28
CA2374389A1 (en) 2000-12-28
CA2374389C (en) 2005-09-20
DE60009502D1 (de) 2004-05-06

Similar Documents

Publication Publication Date Title
DE60009502T2 (de) Lzw datenkomprimierung/dekomprimierungsgerät und - verfahren mit eingebetteter lauflängenkodierung/dekodierung
DE69704362T2 (de) Datenkompressions-/dekompressionssystem anhand sofortiger zeichenfolgensucheverschachtelter wörterbuchaktualisierung
DE3606869C2 (de) Vorrichtung zur Datenkompression
DE69027606T2 (de) Vorrichtung zur datenkompression
DE68924138T2 (de) Daten-kompressions/dekompressionsanordnung.
DE69023329T2 (de) Vorrichtung zur adaptiven datenkompression für ein bandantriebssystem.
DE69706439T2 (de) Rechnersortiersystem zur datenkompression
DE69024629T2 (de) Vorrichtung zur kompression von datenlängen und datenfolgen
DE69508796T2 (de) Lzw datenkomprimierung mit einem assoziativspeicer
DE69318064T2 (de) Verfahren und Vorrichtung zur Verwaltung von mehreren Wörterbüchern zur Datenkomprimierung mit Inhaltsadressierung
DE2264090C3 (de) Datenverdichtung
DE69328855T2 (de) Datenkomprimierung/ -dekomprimierung mit Cache-Speichern
DE69905343T2 (de) Blockweiser adaptiver statistischer datenkompressor
DE69322023T2 (de) Verfahren zur anpassungsfähigen Datenkompression zur Speicherminimierung
DE60000912T2 (de) Verfahren und Vorrichtung zur Datenkomprimierung von Netzwerkdatenpaketen unter Verwendung von paketweisen Hash Tabellen
DE3711200C2 (enExample)
DE69224782T2 (de) Erhöhung der Leistungsfähigkeit beim Rücksetzten von Wörterbüchern für Datenkompressionsanwendungen
DE69802520T2 (de) Verfahren und vorrichtung zur verlustfreien datenkompression
DE69424229T2 (de) Datenkomprimierungsvorrichtung
DE2614916A1 (de) Konverter zur codeumwandlung
DE2139731A1 (de) Anordnung und Verfahren zur Code Um Setzung mit einem Assoziativ Speicher
DE60002218T2 (de) Lzw datenkomprimierungsgerät und -verfahren, mit anwendung von mathematischer vorhersage von lauflängenverarbeitung
DE3485824T2 (de) Verfahren zur datenkompression.
DE3030255A1 (de) Verfahren zur uebermittlung von woertern und nachrichtenuebertragungssystem zu seiner durchfuehrung
DE69607529T2 (de) Kodierung von videofarbbildern

Legal Events

Date Code Title Description
8364 No opposition during term of opposition