MULTIMEDIA AND QUALITY OF SERVICE
COMPRESSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Dictionary based compression ____
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Is a lossless compression format
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Creates a dictionary of common letter combinations to encode words with fewer characters
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Creates a dictionary of smaller letters so less space is used
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Sends the dictionary with the data
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Doesn’t need to send the dictionary with the data
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Explanation:
Detailed explanation-1: -What is Dictionary Compression? Dictionary compression is a simple but effective technique which replaces the occurrences of (long, variable-length) terms by (short) identifiers which are more compact to encode and easier and more efficient to handle.
Detailed explanation-2: -Most dictionary algorithms are adaptive: rather than a fixed, hard-wired dictionary like Pike’s algorithm, as the decoder compresses the text, when it encounters letter triplets or entire words that are not yet in the dictionary, the decoder adds them to the dictionary.
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