JPH0234038A - Data compressing device - Google Patents

Data compressing device

Info

Publication number
JPH0234038A
JPH0234038A JP18393888A JP18393888A JPH0234038A JP H0234038 A JPH0234038 A JP H0234038A JP 18393888 A JP18393888 A JP 18393888A JP 18393888 A JP18393888 A JP 18393888A JP H0234038 A JPH0234038 A JP H0234038A
Authority
JP
Japan
Prior art keywords
data
compression
compressed
means
compression means
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
JP18393888A
Inventor
Kiyoshi Honda
Tsuguji Tateuchi
Tokuhiro Tsukiyama
Original Assignee
Hitachi 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
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP18393888A priority Critical patent/JPH0234038A/en
Publication of JPH0234038A publication Critical patent/JPH0234038A/en
Application status is Pending legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03MCODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00Conversion 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
    • H03M7/30Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/46Conversion 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
    • H03M7/48Conversion 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 alternating with other codes during the code conversion process, e.g. run-length coding being performed only as long as sufficientlylong runs of digits of the same kind are present

Abstract

PURPOSE:To efficiently compress various data strings by providing plural kinds of data compression means receiving input data and selecting the plural kinds of data compression means in response to the compression efficiency with respect to the input data. CONSTITUTION:An input data 12 is given to a 1st data compression means 1 and a 2nd data compression means 2 at the same time, plural kinds of data compression are executed in parallel as to unit quantity of data and the compressed data is stored in 1st and 2nd buffers 3, 4. Then a discrimination circuit 7 discriminates a data compression means giving the best compression efficiency to the unit quantity data and the content of a buffer storing a compression data of the data compression circuit offering the best compression efficiency is selected and outputted by a switching circuit 8. In this case, an identification data representing which data compression means has compressed the data is added to the compression data by 1st and 2nd identification data generating means 9, 10 for the convenience of the decoding the compressed data. Thus, the data is compressed efficiently from various data strings and the transmission time is shortened.
JP18393888A 1988-07-23 1988-07-23 Data compressing device Pending JPH0234038A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18393888A JPH0234038A (en) 1988-07-23 1988-07-23 Data compressing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18393888A JPH0234038A (en) 1988-07-23 1988-07-23 Data compressing device

Publications (1)

Publication Number Publication Date
JPH0234038A true JPH0234038A (en) 1990-02-05

Family

ID=16144430

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18393888A Pending JPH0234038A (en) 1988-07-23 1988-07-23 Data compressing device

Country Status (1)

Country Link
JP (1) JPH0234038A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04223717A (en) * 1990-03-30 1992-08-13 Internatl Business Mach Corp <Ibm> Method and system for selecting data compression model
JPH06222905A (en) * 1992-10-20 1994-08-12 Sony Tektronix Corp Data compressing method
WO1998043359A1 (en) * 1997-03-24 1998-10-01 Advantest Corporation Method and device for compressing and expanding data pattern
US6529912B2 (en) 1997-12-03 2003-03-04 Fujitsu Limited Data compressing apparatus and a data decompressing apparatus, a data compressing method and a data decompressing method, and a data compressing or decompressing dictionary creating apparatus and a computer readable recording medium storing a data compressing program or a data decompressing program
US6661839B1 (en) 1998-03-24 2003-12-09 Advantest Corporation Method and device for compressing and expanding data pattern
JP2008107254A (en) * 2006-10-27 2008-05-08 Yokogawa Electric Corp Device test system, server, device tester, and pattern data setting method
JP5236005B2 (en) * 2008-10-10 2013-07-17 日本電信電話株式会社 Coding method, coding apparatus, decoding method, decoding apparatus, a program and a recording medium
WO2014027429A1 (en) * 2012-08-17 2014-02-20 大日本スクリーン製造株式会社 Data compression method and device, and program therefor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61107818A (en) * 1984-10-30 1986-05-26 Nec Corp Entropy coding system and its device
JPS62191914A (en) * 1986-02-18 1987-08-22 Fuji Facom Corp Data accumulator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61107818A (en) * 1984-10-30 1986-05-26 Nec Corp Entropy coding system and its device
JPS62191914A (en) * 1986-02-18 1987-08-22 Fuji Facom Corp Data accumulator

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04223717A (en) * 1990-03-30 1992-08-13 Internatl Business Mach Corp <Ibm> Method and system for selecting data compression model
JPH06222905A (en) * 1992-10-20 1994-08-12 Sony Tektronix Corp Data compressing method
WO1998043359A1 (en) * 1997-03-24 1998-10-01 Advantest Corporation Method and device for compressing and expanding data pattern
US6529912B2 (en) 1997-12-03 2003-03-04 Fujitsu Limited Data compressing apparatus and a data decompressing apparatus, a data compressing method and a data decompressing method, and a data compressing or decompressing dictionary creating apparatus and a computer readable recording medium storing a data compressing program or a data decompressing program
US6661839B1 (en) 1998-03-24 2003-12-09 Advantest Corporation Method and device for compressing and expanding data pattern
JP2008107254A (en) * 2006-10-27 2008-05-08 Yokogawa Electric Corp Device test system, server, device tester, and pattern data setting method
JP5236005B2 (en) * 2008-10-10 2013-07-17 日本電信電話株式会社 Coding method, coding apparatus, decoding method, decoding apparatus, a program and a recording medium
WO2014027429A1 (en) * 2012-08-17 2014-02-20 大日本スクリーン製造株式会社 Data compression method and device, and program therefor

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