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    The different between Lzw and lz78


    Hello all:
    Would anyone tell me the different between LZW and LZ78, thanks.

    rgds
    stewang
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    Hi Loser:
    I can not browse the website you give me.

    rgds
    stewang
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    Weird... I can...

    This is on that site:

    LZ77

    A dictionary-based compression method, developed in 1977 by Lempel and Ziv. Replaces a re-occurring sequence with a pointer to its earlier occurrence.
    Related term: LZSS
    Related link: LZ77

    LZ78

    A dictionary-based compression method, developed in 1978 by Lempel and Ziv. It builds a dictionary of phrases seen in the data. When a phrase reoccurrs, it replaces it with an index number of the phrase in the dictionary.
    Related term: LZW
    Related link: LZ78

    LZMW

    A dictionary-based compression method. This is a variation of the LZW method. A new string in the dictionary is generated by concatenating the two previous ones.
    Related link: LZW: info on LZMW

    LZSS

    A dictionary-based compression method, developed in 1982 by Storer and Szymanski. This is a variation of the LZ77 method.
    Related link: LZSS

    LZW

    A dictionary-based compression method, developed in 1984 by Terry Welch. This is a variation of the LZ78 method.
    Related link: LZW
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    Hi Loser:
    Thanks for your information.

    rgds
    stewang
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    You're welcome!

    Can you imagine how smart I am? I've answered a man and I did it right!:)

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