MULTIMEDIA AND QUALITY OF SERVICE
COMPRESSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Milan took a photograph with her high resolution digital camera. Then, she emailed a copy of the picture to herself to use in a school project. When Milan downloaded the picture from her email, she noticed that it did not look as crisp and the colors were not exactly the same. Which of the following could be a possible explanation for difference in image quality?
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The picture saved in the email contained fewer pixels than the original image.
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The picture saved in the email contained more pixels than the original image.
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The picture saved in the email was encrypted. Data encryption causes information loss.
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The picture saved in the email was encrypted. Milan needs to decrypt the picture to restore the original image quality.
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Explanation:
Detailed explanation-1: -Lossless compression is ideal for compressing text or numeric files where a loss of data is unacceptable. It is also used in PNG, GIF and ZIP files.
Detailed explanation-2: -Common lossy compression-based image formats are JPEG and MPEG.
Detailed explanation-3: -Lossless compression “packs” data into a smaller file size by using a kind of internal shorthand to signify redundant data.
There is 1 question to complete.