What is Compression?
| Process That Analyzes And Condenses Data |
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Compression is a process that analyzes and condenses information in files, creating a smaller file while maintaining as much quality as possible. Large files, such as graphics or sound, are often compressed using various mathematical formulas, such as JPEG and LZW for graphics or MPEG for sound. Storing information in a format that requires less space than usual. Compressing data is the same as packing data. Data compression is particularly useful in communications because it enables devices to transmit the same amount of information in fewer bits. There are a variety of data compression techniques, but only a few have been standardized. The CCITT has defined a standard data compression technique for transmitting faxes (Group 3 standard) and a compression standard for data communications through modems (CCITT V.42bis). In addition, there are file compression formats, such as ARC and ZIP. Data compression is also widely used in backup utilities, spreadsheet applications, and database management systems. Certain types of information, such as bit-mapped graphics, can be compressed to a small fraction of their normal size. |
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