What is compression?

Compression is a process that involves encoding data using a fewer number of bits than the original version. Compression is of two types: lossy and lossless compression. No information is lost in lossless compression whereas in lossy compression there is a loss of data. Compression is useful as it reduces resources that are required to store and transmit data.

What is video compression?

Video compression is a format that represents content for storage and transmission of digital video. There are various types of compression formats like MPEG-4, HEVC, AV1, et cetera. Lossless video compressions work at a compression factor of 5-12, lossy H.264 compression factor between 20 to 200. Videos are usually represented as a series of still images. This type of data contains a lot of spatial redundancies. Video compression methods try to reduce redundancies.