GB8828796D0 - Data compression - Google Patents

Data compression

Info

Publication number
GB8828796D0
GB8828796D0 GB888828796A GB8828796A GB8828796D0 GB 8828796 D0 GB8828796 D0 GB 8828796D0 GB 888828796 A GB888828796 A GB 888828796A GB 8828796 A GB8828796 A GB 8828796A GB 8828796 D0 GB8828796 D0 GB 8828796D0
Authority
GB
United Kingdom
Prior art keywords
word
data compression
string
mayne
dictionary
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.)
Pending
Application number
GB888828796A
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.)
British Telecommunications PLC
Original Assignee
British Telecommunications PLC
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 British Telecommunications PLC filed Critical British Telecommunications PLC
Priority to GB888828796A priority Critical patent/GB8828796D0/en
Publication of GB8828796D0 publication Critical patent/GB8828796D0/en
Priority to DE68925798T priority patent/DE68925798T2/en
Priority to EP89312818A priority patent/EP0375221B1/en
Priority to AT89312818T priority patent/ATE134780T1/en
Priority to US07/688,552 priority patent/US5253325A/en
Priority to JP2500726A priority patent/JP2771324B2/en
Priority to PCT/GB1989/001469 priority patent/WO1990006560A1/en
Priority to CA002005048A priority patent/CA2005048C/en
Priority to HK111197A priority patent/HK111197A/en
Pending 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
    • H03M7/3084—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction using adaptive string matching, e.g. the Lempel-Ziv method

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Surgical Instruments (AREA)

Abstract

In a data compression system including a dynamically compiled dictionary the dictionary is updated by storing a string comprising a word and a part-word. The part-word comprises a plurality of characters from the string immediately following the word in the input stream. The system may use a Mayne single-pass data compression algorithm. In a system using the Mayne algorithm after each string is matched the corresponding index is transmitted.
GB888828796A 1988-12-09 1988-12-09 Data compression Pending GB8828796D0 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
GB888828796A GB8828796D0 (en) 1988-12-09 1988-12-09 Data compression
DE68925798T DE68925798T2 (en) 1988-12-09 1989-12-08 Data compression
EP89312818A EP0375221B1 (en) 1988-12-09 1989-12-08 Data compression
AT89312818T ATE134780T1 (en) 1988-12-09 1989-12-08 DATA COMPRESSION
US07/688,552 US5253325A (en) 1988-12-09 1989-12-08 Data compression with dynamically compiled dictionary
JP2500726A JP2771324B2 (en) 1988-12-09 1989-12-08 Data compression
PCT/GB1989/001469 WO1990006560A1 (en) 1988-12-09 1989-12-08 Data compression
CA002005048A CA2005048C (en) 1988-12-09 1989-12-11 Data compression
HK111197A HK111197A (en) 1988-12-09 1997-06-26 Data compression

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB888828796A GB8828796D0 (en) 1988-12-09 1988-12-09 Data compression

Publications (1)

Publication Number Publication Date
GB8828796D0 true GB8828796D0 (en) 1989-01-18

Family

ID=10648248

Family Applications (1)

Application Number Title Priority Date Filing Date
GB888828796A Pending GB8828796D0 (en) 1988-12-09 1988-12-09 Data compression

Country Status (9)

Country Link
US (1) US5253325A (en)
EP (1) EP0375221B1 (en)
JP (1) JP2771324B2 (en)
AT (1) ATE134780T1 (en)
CA (1) CA2005048C (en)
DE (1) DE68925798T2 (en)
GB (1) GB8828796D0 (en)
HK (1) HK111197A (en)
WO (1) WO1990006560A1 (en)

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Also Published As

Publication number Publication date
JP2771324B2 (en) 1998-07-02
ATE134780T1 (en) 1996-03-15
EP0375221A1 (en) 1990-06-27
US5253325A (en) 1993-10-12
CA2005048A1 (en) 1990-06-09
HK111197A (en) 1997-08-29
JPH04502377A (en) 1992-04-23
EP0375221B1 (en) 1996-02-28
DE68925798D1 (en) 1996-04-04
DE68925798T2 (en) 1996-09-19
WO1990006560A1 (en) 1990-06-14
CA2005048C (en) 1999-01-12

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