For 10 points, name this process in which a file is decreased in size.
The Kolmogorov complexity describes the difficulty in performing this process. One method of doing this process uses a sliding window of references to previous data, while another uses a tree of prefixes based on occurrence frequency and improved on an earlier method by Shannon and Fano. Lempel and Ziv, as well as (*) Huffman, name methods of doing this process that might result in FLAC files. Artifacts may result from the lossy type of this process, which is exemplified by the conversion of images to JPEGs. ZIP files have undergone this process. For 10 points, name this process in which a file is decreased in size.
The Kolmogorov complexity describes the difficulty in performing this process.
compression (accept word forms; accept specific types like data compression or image compression; prompt on “encoding”) (Editor’s note: plus 100 imaginary points for “middle-out compression”)