GB2319689B - Compression of palletized images - Google Patents

Compression of palletized images

Info

Publication number
GB2319689B
GB2319689B GB9802301A GB9802301A GB2319689B GB 2319689 B GB2319689 B GB 2319689B GB 9802301 A GB9802301 A GB 9802301A GB 9802301 A GB9802301 A GB 9802301A GB 2319689 B GB2319689 B GB 2319689B
Authority
GB
United Kingdom
Prior art keywords
compression
palletized images
palletized
images
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
GB9802301A
Other versions
GB2319689A (en
GB9802301D0 (en
Inventor
Ahmad Zandi
David G Stork
James Allen
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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
Priority claimed from US08/200,233 external-priority patent/US5471207A/en
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Publication of GB9802301D0 publication Critical patent/GB9802301D0/en
Publication of GB2319689A publication Critical patent/GB2319689A/en
Application granted granted Critical
Publication of GB2319689B publication Critical patent/GB2319689B/en
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
    • 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
    • H03M7/4006—Conversion to or from arithmetic code
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • H03M7/40—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)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
GB9802301A 1994-02-23 1995-02-21 Compression of palletized images Expired - Fee Related GB2319689B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/200,233 US5471207A (en) 1994-02-23 1994-02-23 Compression of palettized images and binarization for bitwise coding of M-ary alphabets therefor
GB9503417A GB2286942B (en) 1994-02-23 1995-02-21 Compression of palletized images and binarization for bitwise coding of m-ary alphabets therefor

Publications (3)

Publication Number Publication Date
GB9802301D0 GB9802301D0 (en) 1998-04-01
GB2319689A GB2319689A (en) 1998-05-27
GB2319689B true GB2319689B (en) 1998-07-15

Family

ID=26306548

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9802301A Expired - Fee Related GB2319689B (en) 1994-02-23 1995-02-21 Compression of palletized images

Country Status (1)

Country Link
GB (1) GB2319689B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2813484A1 (en) * 2000-08-31 2002-03-01 Koninkl Philips Electronics Nv Time series steps MPEG4 norm decoding/digital processing having preparation step with intermediate sub step/finishing steps sequencing/finding optimum results
EP1322117A1 (en) * 2001-12-06 2003-06-25 Koninklijke Philips Electronics N.V. Arithmetic coder and decoder
US8526745B2 (en) 2009-12-03 2013-09-03 Sony Corporation Embedded graphics coding: reordered bitstream for parallel decoding
EP2561680B1 (en) 2010-04-19 2020-07-15 BlackBerry Limited Methods and devices for reordered parallel entropy coding
CA2799763A1 (en) 2010-07-13 2012-01-19 Research In Motion Limited Methods and devices for data compression using context-based coding order
CA2798125C (en) 2010-07-28 2016-04-05 Research In Motion Limited Method and device for compression of binary sequences by grouping multiple symbols
WO2012040857A1 (en) 2010-10-01 2012-04-05 Research In Motion Limited Methods and devices for parallel encoding and decoding using a bitstream structured for reduced delay
EP3309969B1 (en) 2011-06-24 2023-04-19 Sun Patent Trust Image coding method and apparatus

Also Published As

Publication number Publication date
GB2319689A (en) 1998-05-27
GB9802301D0 (en) 1998-04-01

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Legal Events

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

Effective date: 20080221