Lossy compression techniques are used in all DVDs, Blu-ray discs, and most multimedia available on the internet. The fact that information is lost during compression will often be unnoticeable to most users. Lossy compression is typically used to compress video, audio and images, as well as internet telephony. When the file is uncompressed, not all of the original information will be recovered. Lossy compression is a data encoding method which reduces a file by discarding certain information. Besides reducing transmission bandwidth, compression increases the amount of information that can be stored on a hard disk drive or other storage device. Compressing data can be very useful particularly in the field of communications as it enables devices to transmit or store data in fewer bits. Data compression is the process of storing data in a format that uses less space than the original representation would use.
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