MULTIMEDIA AND QUALITY OF SERVICE
COMPRESSION
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: -MP3 (not hi-res): Popular, lossy compressed format ensures small file size but is far from the best sound quality. Convenient for storing music on phones and iPods.
Detailed explanation-2: -Lossy audio formats lose data in the transmission. They don’t decompress back to their original file size, so they end up smaller and some sound waves are lost. Artists and engineers who send audio files back and forth prefer not to use lossy formats, because the files degrade every time they’re exported.
Detailed explanation-3: -Audio that is stored in a format that doesn’t remove data (effectively making it the same or better than what might be stored on a CD) is called lossless audio. Audio that’s been data compressed, and is missing some of its original information, is known as lossy audio.