MULTIMEDIA AND QUALITY OF SERVICE
COMPRESSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Lossy
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Lossless
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Either A or B
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None of the above
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Detailed explanation-1: -Lossless compression algorithms are needed in cases where we want the reconstructed file output to be identical to the original output. Lossless compression is generally used for text compression: data such as database records, spreadsheets, and word processing files.
Detailed explanation-2: -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.
Detailed explanation-3: -PNG is a raster graphics format that supports lossless compression, maintaining detail and contrast between colors. In particular, PNG offers much better text readability than JPEG. This makes PNG a more popular choice for infographics, banners, screenshots, and other graphics that include both images and text.