CA2475189A1 - Method and apparatus for window matching in delta compressors - Google Patents

Method and apparatus for window matching in delta compressors Download PDF

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Publication number
CA2475189A1
CA2475189A1 CA002475189A CA2475189A CA2475189A1 CA 2475189 A1 CA2475189 A1 CA 2475189A1 CA 002475189 A CA002475189 A CA 002475189A CA 2475189 A CA2475189 A CA 2475189A CA 2475189 A1 CA2475189 A1 CA 2475189A1
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CA
Canada
Prior art keywords
windows
file
target file
source file
matching
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.)
Granted
Application number
CA002475189A
Other languages
French (fr)
Other versions
CA2475189C (en
Inventor
Kiem-Phong Vo
Binh Dao Vo
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.)
AT&T Corp
Original Assignee
At&T Corp.
Kiem-Phong Vo
Binh Dao Vo
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Publication date
Application filed by At&T Corp., Kiem-Phong Vo, Binh Dao Vo filed Critical At&T Corp.
Publication of CA2475189A1 publication Critical patent/CA2475189A1/en
Application granted granted Critical
Publication of CA2475189C publication Critical patent/CA2475189C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99931—Database or file accessing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99931—Database or file accessing
    • Y10S707/99933—Query processing, i.e. searching
    • Y10S707/99935—Query augmenting and refining, e.g. inexact access
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99931—Database or file accessing
    • Y10S707/99933—Query processing, i.e. searching
    • Y10S707/99936—Pattern matching access
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99941—Database schema or data structure
    • Y10S707/99942—Manipulating data structure, e.g. compression, compaction, compilation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99941—Database schema or data structure
    • Y10S707/99943—Generating database or data structure, e.g. via user interface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99941—Database schema or data structure
    • Y10S707/99944—Object-oriented database structure
    • Y10S707/99945—Object-oriented database structure processing

Abstract

The present invention provides efficient target file window matching within the source file for delta compressors. One embodiment provides an apparatus for matching target file windows of a target file with source file windows of a source file in delta compressors, comprising: means for partitioning the source file into a plurality of source file windows; means for partitioning the target file into a plurality of target file windows; and means for matching one of said plurality of source file windows with one of said target file windows based upon a distance function that defines a distance between a data segment of said one of said plurality of source file windows and a data segment of said one of said target file windows using a respective n-gram of said data segments.
CA002475189A 2003-07-17 2004-07-19 Method and apparatus for window matching in delta compressors Expired - Fee Related CA2475189C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US48799203P 2003-07-17 2003-07-17
US60/487,992 2003-07-17

Publications (2)

Publication Number Publication Date
CA2475189A1 true CA2475189A1 (en) 2005-01-17
CA2475189C CA2475189C (en) 2009-10-06

Family

ID=34079401

Family Applications (3)

Application Number Title Priority Date Filing Date
CA002475186A Expired - Fee Related CA2475186C (en) 2003-07-17 2004-07-19 Method and apparatus for windowing in entropy encoding
CA002686618A Abandoned CA2686618A1 (en) 2003-07-17 2004-07-19 Method and apparatus for windowing in entropy encoding
CA002475189A Expired - Fee Related CA2475189C (en) 2003-07-17 2004-07-19 Method and apparatus for window matching in delta compressors

Family Applications Before (2)

Application Number Title Priority Date Filing Date
CA002475186A Expired - Fee Related CA2475186C (en) 2003-07-17 2004-07-19 Method and apparatus for windowing in entropy encoding
CA002686618A Abandoned CA2686618A1 (en) 2003-07-17 2004-07-19 Method and apparatus for windowing in entropy encoding

Country Status (2)

Country Link
US (4) US7296030B2 (en)
CA (3) CA2475186C (en)

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Also Published As

Publication number Publication date
US7925639B2 (en) 2011-04-12
CA2686618A1 (en) 2005-01-17
US7454431B2 (en) 2008-11-18
US7296030B2 (en) 2007-11-13
CA2475186C (en) 2010-01-05
US20050044294A1 (en) 2005-02-24
US8200680B2 (en) 2012-06-12
US20080040375A1 (en) 2008-02-14
US20050055367A1 (en) 2005-03-10
US20110173167A1 (en) 2011-07-14
CA2475189C (en) 2009-10-06
CA2475186A1 (en) 2005-01-17

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