Compression

Compression it is a process of reducing the size of the data and utilize the system space.

• It is the representation of information source(images, videos, data file ) as accurately as possible using fewest number of bits.
• Compressed data can only be understood only after decoding the compressed data at the receiver.
• Compression is possible because information mostly contains the data repeated such as reoccurring letters, numbers or pixels.

Need of Data Compression :

• To reduce size : Compression of size depends on the compression technique.
• Security : compression change the original value of the data.
• Many files can be combined to one compressed document makes sending easier.

Advantages :

• Less disk space required.
• Faster file transfer.
• Faster reading and writing.
• As files are less in size it takes less channel bandwidth in the network.

Disadvantages :

• During the decompressing process the computer uses more space to complete the task.
• The process is slow and time consuming.
• Changes of getting effect of viruses or malware.

Examples for Compression :