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What (who) is run-length encoding - definition

SIMPLE FORM OF DATA COMPRESSION IN WHICH RUNS OF DATA (SEQUENCES IN WHICH THE SAME DATA VALUE OCCURS IN MANY CONSECUTIVE DATA ELEMENTS) ARE STORED AS A SINGLE DATA VALUE AND COUNT

Run-length coded; Run length encoding; RLE Compression; .rle; Run-length; Run length; Run length coding; Run-length coding; T.45 (standard)

run-length encoding

A kind of compression algorithm which replaces sequences ("runs") of consecutive repeated characters (or other units of data) with a single character and the length of the run. This can either be applied to all input characters, including runs of length one, or a special character can be used to introduce a run-length encoded group. The longer and more frequent the runs are, the greater the compression that will be achieved. This technique is particularly useful for encoding black and white images where the data units would be single bit pixels. (1994-10-27)

Run-length encoding

Run-length encoding (RLE) is a form of lossless data compression in which runs of data (sequences in which the same data value occurs in many consecutive data elements) are stored as a single data value and count, rather than as the original run. This is most efficient on data that contains many such runs, for example, simple graphic images such as icons, line drawings, Conway's Game of Life, and animations.

https://en.wikipedia.org/wiki/Run-length_encoding

Variable-length code

INFORMATION THEORY TECHNIQUE FOR ASSIGNING SHORTER ENCODING SEQUENCES TO MORE FREQUENTLY-OCCURRING REPRESENTED ELEMENTS

Uniquely decodable code; Variable length codes; Variable length code; Variable-length codes; Variable-length coding; Variable-length encoding; Variable length coding; Variable length encoding; Variable Length Coding; Uniqely decodable

In coding theory a variable-length code is a code which maps source symbols to a variable number of bits.

https://en.wikipedia.org/wiki/Variable-length_code

Wikipedia

Run-length encoding

Run-length encoding (RLE) is a form of lossless data compression in which runs of data (sequences in which the same data value occurs in many consecutive data elements) are stored as a single data value and count, rather than as the original run. This is most efficient on data that contains many such runs, for example, simple graphic images such as icons, line drawings, Conway's Game of Life, and animations. For files that do not have many runs, RLE could increase the file size.

RLE may also be used to refer to an early graphics file format supported by CompuServe for compressing black and white images, but was widely supplanted by their later Graphics Interchange Format (GIF). RLE also refers to a little-used image format in Windows 3.x, with the extension rle, which is a run-length encoded bitmap, used to compress the Windows 3.x startup screen.

https://en.wikipedia.org/wiki/Run-length encoding