Data is a collection of raw facts and figures , It comprises symbols , numbers , words or images. The data may be the result of any experiment or observations of a variable.
The processed data or manipulated data is called. information
The process on data means to add some knowledge or manners in the raw facts or in the content of computing to perform some arithmetic or logical operation on it .
Data compression
Data compression is a process of encoding applying some specific encoding scheme. Data compression is also used is data transmission.
Need of compression
compression is useful because it reduces the consumption of expensive resources like hard disk space or transmission band width.
- To reduce the storage space
- To increase the capacity of communication channel
- Information security
Large amount of data requires more memory for storage. Data compression is helpful if you want to store data and there is less space on hard-disk
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