COMPUTER NETWORKING

MULTIMEDIA AND QUALITY OF SERVICE

COMPRESSION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Lossy compression looks for patterns in the data and determines how much can be discarded without noticeably affecting the overall quality of the file.
A
True
B
False
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -Lossy compression is typically used when a file can afford to lose some data, and/or if storage space needs to be drastically ‘freed up’. Here, an algorithm scans image files and reduces their size by discarding information considered less important or undetectable to the human eye.

Detailed explanation-2: -Lossy data compression permanently discards some of the original data. It exploits the fact that human beings cannot detect subtle differences in sounds and colours. Key data is retained and less important data is discarded when lossy data compression takes place.

Detailed explanation-3: -Lossless compression restores and rebuilds file data in its original form after the file is decompressed. For example, when a picture’s file size is compressed, its quality remains the same. The file can be decompressed to its original quality without any loss of data.

There is 1 question to complete.