In signal processing, data compression, source coding, or bit-rate reduction involves encoding information using fewer bits than the original representation. Compression can be either lossy or lossless. Lossless compression reduces bits by identifying and eliminating statistical redundancy. No information is lost in lossless compression. Lossy compression reduces bits by identifying unnecessary information and removing it. The process of reducing the size of a data file is referred to as data compression. In the context of data transmission, it is called source coding (encoding done at the source of the data before it is stored or transmitted) in opposition to channel coding. 

Compression is useful because it helps reduce resource usage, such as data storage space or transmission capacity. Because compressed data must be decompressed to use, this extra processing imposes computational or other costs through decompression; this situation is far from being a free lunch. Data compression is subject to a space–time complexity trade-off. For instance, a compression scheme for video may require expensive hardware for the video to be decompressed fast enough to be viewed as it is being decompressed, and the option to decompress the video in full before watching it may be inconvenient or require additional storage. The design of data compression schemes involves trade-offs among various factors, including the degree of compression, the amount of distortion introduced (when using lossy data compression), and the computational resources required to compress and decompress the data.
Why is compression Useful?
What are the type of resource usage
What is the use for this space?
What is the example of the situation for the compressed data?
What utilized encoding information?
What is the name of the process at which this is used.
What are the two varieties of compression?
What differentiate the Lossy?
What is data compression called?
Do video compression require costly materials?
it helps reduce resource usage
it helps reduce resource usage
data storage space or transmission capacity
 data storage space or transmission capacity
SO as o compress data?
compressed data must be decompressed to use,
compression scheme for video
compression scheme for video
data compression, source coding, or bit-rate reduction
 data compression, source coding, or bit-rate reduction
signal processing
 signal processing
lossy or lossless
lossy or lossless
Lossy compression reduces bits by identifying unnecessary information and removing it
 Lossy compression reduces bits by identifying unnecessary information and removing it
reducing the size of a data file
 reducing the size of a data file
yes
compression scheme for video may require expensive hardware