Lossy compression is a method of compressing data (digital multimedia) and then decompressing it to retrieve the data, though the decompressed one may be slightly different than the original one. Lossy compression method is used to compress multimedia data comprising of digital audio, video and still images. Although, digital still images do not need to be compressed, still lossy method serves as an important compression tool for it, especially for websites that have number of images.
Lossy compression is a data encoding method that compresses data by discarding (losing) some of it. The procedure aims to minimise the amount of data that need to be handled, and/or transmitted by a computer. Lossy compression is most commonly used to compress multimedia data (audio,video, and still images), especially in applications such as streaming media and internet telephony to reduce bandwidth and file storage space.