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 or lossless? This type of compression makes the file smaller
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Lossy
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Lossless
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Both
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None of the above
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Explanation:
Detailed explanation-1: -There are two methods of compression – lossy and lossless. Lossy reduces file size by permanently removing some of the original data. Lossless reduces file size by removing unnecessary metadata.
Detailed explanation-2: -Lossless compression retains values and manages to lower file size. However, lossy compression reduces file size by eliminating redundant information. While LZ77 is an example of lossless compression, JPEG is an example of lossy compression.
Detailed explanation-3: -Files types RAW, BMP and PNG are all forms of lossless compression. They keep their quality at the expense of huge storage space. In audio lossy files are MP3, MP4 and OGG. Lossless files are WAV, FLAC and ALAC (used by itunes).
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