MULTIMEDIA AND QUALITY OF SERVICE
COMPRESSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Compression packages which use an LZ77-based algorithm followed by a variable-length coder.
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PKZip
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Zip
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PNG
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All of the above
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Explanation:
Detailed explanation-1: -The LZ77 algorithm works on past data whereas LZ78 algorithm attempts to work on future data. It does this by forward scanning the input buffer and matching it against a dictionary it maintains. It will scan into the buffer until it cannot find a match in the dictionary.
Detailed explanation-2: -LZ77 is a dictionary-based method, which means that it tries to compress data by encoding long strings of symbols, called phrases, as small tokens that reference entries in a dictionary. Compression is achieved by using relatively small tokens in place of longer phrases that appear several times in the data.
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