AU2001228635A1 - Data compression having improved compression speed - Google Patents
Data compression having improved compression speedInfo
- Publication number
- AU2001228635A1 AU2001228635A1 AU2001228635A AU2863501A AU2001228635A1 AU 2001228635 A1 AU2001228635 A1 AU 2001228635A1 AU 2001228635 A AU2001228635 A AU 2001228635A AU 2863501 A AU2863501 A AU 2863501A AU 2001228635 A1 AU2001228635 A1 AU 2001228635A1
- Authority
- AU
- Australia
- Prior art keywords
- dictionary
- data
- compression
- vector
- current
- 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.)
- Abandoned
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
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Abstract
A lossless data compression system comprising a dictionary (30) based on content addressable memory and a coder (40) having between them a critical path including a feedback loop forming a dictionary adaption path, in which circuit means (42) is connected in the feedback loop so that the dictionary can be updated using data from a previous comparison cycle at the same time as the coder codes a current comparison cycle. The circuit means (42) has a current adaptation vector (58, 62, 66) and a next adaption vector (60, 64, 68); at leach search step the current adaptation vector updates data in the dictionary and also rearranges the next adaptation vector. Compression speed is increased.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB0001711.1A GB0001711D0 (en) | 2000-01-25 | 2000-01-25 | Data compression having improved compression speed |
GB0001711 | 2000-01-25 | ||
PCT/GB2001/000237 WO2001056169A1 (en) | 2000-01-25 | 2001-01-22 | Data compression having improved compression speed |
Publications (1)
Publication Number | Publication Date |
---|---|
AU2001228635A1 true AU2001228635A1 (en) | 2001-08-07 |
Family
ID=9884322
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2001228635A Abandoned AU2001228635A1 (en) | 2000-01-25 | 2001-01-22 | Data compression having improved compression speed |
Country Status (11)
Country | Link |
---|---|
US (1) | US6765509B2 (en) |
EP (1) | EP1262025B1 (en) |
JP (1) | JP2003521190A (en) |
KR (1) | KR20020070504A (en) |
AT (1) | ATE297609T1 (en) |
AU (1) | AU2001228635A1 (en) |
CA (1) | CA2398346A1 (en) |
DE (1) | DE60111361D1 (en) |
GB (1) | GB0001711D0 (en) |
HK (1) | HK1048900A1 (en) |
WO (1) | WO2001056169A1 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6748101B1 (en) | 1995-05-02 | 2004-06-08 | Cummins-Allison Corp. | Automatic currency processing system |
AR042582A1 (en) * | 2000-11-16 | 2005-06-29 | Ericsson Telefon Ab L M | SYSTEM AND METHOD OF COMMUNICATIONS USING FORMS OF REQUEST COMMUNICATION - REPLACEMENT FOR COMPRESSION OF DATA |
US6963587B2 (en) | 2000-11-16 | 2005-11-08 | Telefonaktiebolaget Lm Ericsson (Publ) | Communication system and method utilizing request-reply communication patterns for data compression |
GB0102572D0 (en) * | 2001-02-01 | 2001-03-21 | Btg Int Ltd | Apparatus to provide fast data compression |
US6892292B2 (en) * | 2002-01-09 | 2005-05-10 | Nec Corporation | Apparatus for one-cycle decompression of compressed data and methods of operation thereof |
US6674908B1 (en) | 2002-05-04 | 2004-01-06 | Edward Lasar Aronov | Method of compression of binary data with a random number generator |
DE10310858A1 (en) * | 2003-03-11 | 2004-09-23 | Bergische Universität Wuppertal | Character string compression method for compressing computer data, whereby data on a data bus to a memory component is compared with data stored in the memory to find the longest possible match |
US6900746B1 (en) * | 2003-12-23 | 2005-05-31 | Wend Llc | Asynchronous, data-activated concatenator for variable length datum segments |
JP2006324944A (en) * | 2005-05-19 | 2006-11-30 | Renesas Technology Corp | Encoding device |
EP1957094B1 (en) * | 2005-09-28 | 2015-09-16 | The Regents of The University of California | Calcium binding peptides |
DE102007033146B4 (en) | 2007-07-13 | 2012-02-02 | Schwäbische Hüttenwerke Automotive GmbH & Co. KG | Adjustment valve for adjusting the delivery volume of a positive displacement pump |
JP5828256B2 (en) * | 2011-09-27 | 2015-12-02 | 日本電気株式会社 | Data transfer control device, data transfer control method, and data transfer control system |
US8947270B2 (en) | 2013-06-29 | 2015-02-03 | Intel Corporation | Apparatus and method to accelerate compression and decompression operations |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4876541A (en) * | 1987-10-15 | 1989-10-24 | Data Compression Corporation | Stem for dynamically compressing and decompressing electronic data |
US5861827A (en) * | 1996-07-24 | 1999-01-19 | Unisys Corporation | Data compression and decompression system with immediate dictionary updating interleaved with string search |
-
2000
- 2000-01-25 GB GBGB0001711.1A patent/GB0001711D0/en not_active Ceased
-
2001
- 2001-01-22 DE DE60111361T patent/DE60111361D1/en not_active Expired - Lifetime
- 2001-01-22 CA CA002398346A patent/CA2398346A1/en not_active Abandoned
- 2001-01-22 US US10/182,184 patent/US6765509B2/en not_active Expired - Fee Related
- 2001-01-22 WO PCT/GB2001/000237 patent/WO2001056169A1/en active IP Right Grant
- 2001-01-22 JP JP2001555211A patent/JP2003521190A/en active Pending
- 2001-01-22 AT AT01946992T patent/ATE297609T1/en not_active IP Right Cessation
- 2001-01-22 EP EP01946992A patent/EP1262025B1/en not_active Expired - Lifetime
- 2001-01-22 KR KR1020027009439A patent/KR20020070504A/en not_active Application Discontinuation
- 2001-01-22 AU AU2001228635A patent/AU2001228635A1/en not_active Abandoned
-
2003
- 2003-02-04 HK HK03100797A patent/HK1048900A1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
US6765509B2 (en) | 2004-07-20 |
GB0001711D0 (en) | 2000-03-15 |
US20030117299A1 (en) | 2003-06-26 |
WO2001056169A1 (en) | 2001-08-02 |
EP1262025B1 (en) | 2005-06-08 |
HK1048900A1 (en) | 2003-04-17 |
EP1262025A1 (en) | 2002-12-04 |
CA2398346A1 (en) | 2001-08-02 |
KR20020070504A (en) | 2002-09-09 |
ATE297609T1 (en) | 2005-06-15 |
JP2003521190A (en) | 2003-07-08 |
DE60111361D1 (en) | 2005-07-14 |
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