LZ77avkodning

LZ77avkodning refers to the decoding process for data compressed using the LZ77 algorithm. LZ77 is a lossless data compression technique that identifies and replaces duplicate sequences of data with references to their previous occurrences. The decoding process essentially reverses this. When an LZ77 encoded stream is encountered, the decoder reads through it. It encounters two types of data: literal bytes, which are simply copied to the output, and back-references. A back-reference typically consists of a length and a distance. The decoder uses this length and distance to locate the previously occurring sequence in the already decoded portion of the data and copies it to the current output position. This process continues until the entire encoded stream has been processed, resulting in the original, uncompressed data. The effectiveness of LZ77avkodning relies on the accurate interpretation of these length and distance pairs, which are usually encoded in a specific format within the compressed data stream.