BTM 200 Lecture Notes - Lecture 12: Lossy Compression, Lossless Compression, Zoho Corporation
29 May 2020
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Document Summary
A method of removing repetitive elements from a data file so that it requires less storage space and therefore less time to transmit. Later the data is decompressed the repeated patterns are restored: lossless compression. Uses mathematical techniques to replace repetitive patterns of bits with a kind of coded summary. During decompression, the coded summaries are replaced with the original patterns of bits -- the data that comes out is exactly the same as what went in. Lossless techniques are used when it"s important that nothing be lost for instance, for computer data, database records, spreadsheets, and word processing files: lossy compression. Lossy data compression involves a certain loss of accuracy in exchange for a high degree of compression. Examples of two lossy compression file formats are . jpeg and . mpeg, used for graphics files and sound files. Word processing uses computers to create, edit, print, and store text. Apple iwork pages, google apps, zoho writer, etc.
