A technique in
information technology by which the same amount of data is transmitted by using
a smaller number of bits
its storing data in a
format that requires less space than usual.
There are a variety of
data compression techniques, but only a few have been standardized.
The CCITT has defined
a standard data compression technique for transmitting faxes and a compression standard for data .
There are two main types of compressions e.g. lossless and lossy.
Following is the difference between them.
Lossless
Using this method you can always get back to the original file.
Mainly used for text data compression and decompression.
It can also be applied to image compression.
Lossy
In lossy data compression original data is not exactly restored after decompression and accuracy of re-construction is traded with efficiency of compression.
Mainly used for image data compression and decompression.
Compression ratio is high compare to lossless data compression technique.
Following is the difference between them.
Lossless
These are used to make a file a smaller size but without losing any of the information.
Using this method you can always get back to the original file.
Mainly used for text data compression and decompression.
It can also be applied to image compression.
In lossy data compression original data is not exactly restored after decompression and accuracy of re-construction is traded with efficiency of compression.
Mainly used for image data compression and decompression.
Compression ratio is high compare to lossless data compression technique.
