MULTIMEDIA AND QUALITY OF SERVICE
COMPRESSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which 3 statements best describe Lossless compression ____
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Is used when not all the information is needed
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Is not as effective as lossy compression
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Can fully regenerate the original file
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Includes files such as .ZIP
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Would be a sensible choice for a music download site
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Explanation:
Detailed explanation-1: -The algorithms used in lossy compression are: Transform Coding. Discrete Cosine Transform. Discrete Wavelet Transform.
Detailed explanation-2: -With lossless compression the file data is restored and rebuilt in its original form after decompression, enabling the image to take up less space without any discernible loss in picture quality. No data is lost and as the process can be reversed, it’s also known as reversible compression.
Detailed explanation-3: -The most successful compressors are XM and GeCo. For eukaryotes XM is slightly better in compression ratio, though for sequences larger than 100 MB its computational requirements are impractical.
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