MULTIMEDIA AND QUALITY OF SERVICE
COMPRESSION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
No information is lost but file size is increased
|
|
|
There is no loss in information at all after compression
|
|
|
Files which have the exact same data after compression
|
|
|
Compression that involves an algorithm
|
Detailed explanation-1: -Lossless compression is a class of data compression that allows the original data to be perfectly reconstructed from the compressed data with no loss of information.
Detailed explanation-2: -6.4. Lossless compression is a compression technique that does not lose any data in the compression process. Lossless compression “packs” data into a smaller file size by using a kind of internal shorthand to signify redundant data.
Detailed explanation-3: -Lossless compression is only used in situations where lossy compression techniques can’t be used. Lossy compression is best suited for situations where some loss of detail is tolerable, especially if it will not be detectable by a human.
Detailed explanation-4: -There are two basic types of compression: lossy methods, in which some data is lost when the files are decompressed, and lossless methods, in which no data is lost when the files are restored to their original format. As long as bandwidth is expensive and people are impatient, data compression is here to stay.