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Thread: LZXQ v0.3

  1. #1
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    Hello,
    I fixed some bugs in lzxq v0.2.
    And I also replace the order1 arithmetic coder with order4-2-1 arithmetic coder.
    Now it eat more memory but the compression ratio is higher than old version.

    www.cis.nctu.edu.tw/~is93061/lzxq03.zip

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    Cool! Thanks!

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    Thanks!
    In the next version, I recommend you not to always write the info on the bytes processed ! it the process of compression!
    Hi!

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    Thanks vcore!

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    Quick test...

    A10.jpg > 912,696
    AcroRd32.exe > 1,678,310
    english.dic > 1,039,673
    FlashMX.pdf > 3,999,008
    FP.LOG > 828,878
    MSO97.DLL > 1,995,504
    ohs.doc > 883,150
    rafale.bmp > 865,177
    vcfiu.hlp > 688,690
    world95.txt > 594,654

    Total = 13,485,740 bytes


    ENWIK8 > 25,812,158 bytes

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    Quote Originally Posted by Nania Francesco Antonio
    In the next version, I recommend you not to always write the info on the bytes processed ! it the process of compression!
    I agree!

    I look forward to the next release!

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    Thanks for test, LovePimple!
    I will improve it in the next version.

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    MOC Test passed!

    LZQX V. 03
    To compress: 2486,485
    To decompress: 3573,530
    Size: 163.715.172
    Not classified!
    Need more and more Speed ! Hi !

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    Hi, Francesco:

    In your MOC test, it seems that you misspell the name "lzxq", not"lzqx".
    thanks for test!
    I will improve the performance in next version!

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    Hello,

    As far as I know, LZP algorithm has to use large hash table to predict the match string position.
    Besides, it has to use the same hash memory during compression and decompression.
    Is there any better ways to use LZP but with less memory ?

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    Hello!

    lzxq v0.4 is here!
    it contains three versions: Lite,Normal and Extreme.
    Lite use very less memory and Extreme version use large memory.

    lzxqv04.zip


    quick test for enwik8

    Compressed size
    Lite: 33,859,315 bytes
    Normal: 32,160,067 bytes
    Extreme: 26,441,039 bytes.


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    GOOD WORK! HI!
    INTEL CORE 2 DUO E6600 2GB RAM
    LZXQ_NORMAL_____________________
    SFC TEST
    14.375.058 COMP. 17,469 SEC. DEC. 23,689 SEC.
    CALGARY CORPUS
    980.456 COMP. 4,922 SEC. DEC. 5,296 SEC.
    LZXQ_LITE_________________
    SFC TEST
    14.746.673 COMP. 13,844 SEC. DEC. 19,827 SEC.
    CALGARY CORPUS
    1.010.970 COMP. 1,328 SEC. DEC. 1,688 SEC.
    LZXQ_EXTREME__________________
    SFC TEST
    13.804.566 COMP. 138,720 SEC. DEC. 236,797 SEC.
    CALGARY CORPUS
    814.356 COMP. 5,655 SEC. DEC. 8,220 SEC.

  13. #13
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    TEST ENWIK8
    EXTREME -> 26.441.039
    NORMAL->32.160.067
    LITE->33.859.315

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    Quote Originally Posted by vcore
    Hello!

    lzxq v0.4 is here!
    it contains three versions: Lite,Normal and Extreme.
    Lite use very less memory and Extreme version use large memory.
    Thanks vcore!

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    Quick test...

    LZXQ v0.4 EXTREME:

    A10.jpg > 913,051
    AcroRd32.exe > 1,711,904
    english.dic > 1,054,098
    FlashMX.pdf > 4,023,593
    FP.LOG > 856,945
    MSO97.DLL > 2,039,358
    ohs.doc > 905,060
    rafale.bmp > 960,947
    vcfiu.hlp > 718,224
    world95.txt > 621,386

    Total = 13,804,566 bytes

    LZXQ v0.3 (for comparison)

    A10.jpg > 912,696
    AcroRd32.exe > 1,678,310
    english.dic > 1,039,673
    FlashMX.pdf > 3,999,008
    FP.LOG > 828,878
    MSO97.DLL > 1,995,504
    ohs.doc > 883,150
    rafale.bmp > 865,177
    vcfiu.hlp > 688,690
    world95.txt > 594,654

    Total = 13,485,740 bytes

  16. #16
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    Hi !

    Thanks LovePimple and Francesco!

    I would stop the developement of this lzp compressor.
    because I am starting to write another compressor that based on context mixing!! because context mixing is very powerful!!

  17. #17
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    Be sorry me that you have left the development of this compressor! Have not published the results of this last version in MOC in how much in the verification of the decompression has signalled some errors with the normal and lite while is being really jammed with the version extreme!

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