Pronunciation: [ˌɑːɹˌɛlˈiː] (IPA) 
The word "RLE" is not a common word, but it refers to a run-length encoding, a data compression technique used in digital image processing. The spelling of "RLE" is easy to understand when using IPA phonetic transcription. It is pronounced /ɑrliː/. The first sound is that of the letter "R", followed by the "L" sound and the "E" vowel sound. It is a straightforward spelling that can be easily pronounced in English-speaking countries.
RLE, which stands for Run-Length Encoding, is a data compression algorithm used to reduce the size of repetitive or redundant sequences in a file or data stream. It is a simple and efficient method that can achieve compression ratios by representing repeated consecutive data elements using a pair of values: the data element itself and the number of times it is repeated.
In RLE, the input data is scanned sequentially, and if a repeated string of identical data elements is found, it is replaced with a token that contains the repeated element and its count. This token takes up less space in memory than the repetitive sequence, resulting in reduced data size. The algorithm provides the advantage of being fast and simple to implement, requiring minimal computational resources.
RLE is commonly used in image or video compression algorithms, as graphical data often contains recurring sequences like borders, flat regions, or patterns. By utilizing RLE, these repetitive sections can be efficiently compressed, resulting in smaller file sizes without significant loss in quality.
However, RLE is most effective when there is a substantial amount of repeated data. In cases where there are few repetitions or complex patterns, the compression achieved may be limited, and other more sophisticated compression algorithms may be more appropriate.
