LempelZivalgoritmeja

The Lempel-Ziv algorithm, often referred to as LZ77 or LZ78, is a family of lossless data compression algorithms developed by Abraham Lempel and Jacob Ziv. These algorithms are widely used in various applications, including file compression, data transmission, and storage systems. The LZ77 algorithm, introduced in 1977, is based on the idea of replacing repeated occurrences of data with references to a single copy of that data existing earlier in the uncompressed data stream. This is achieved by maintaining a sliding window that contains the most recently processed data, and a look-ahead buffer that contains the data to be processed next. The algorithm searches for the longest match between the look-ahead buffer and the sliding window, and replaces it with a reference to the match in the sliding window. The LZ78 algorithm, introduced in 1978, is based on the idea of replacing repeated occurrences of data with references to a dictionary of previously seen data. This is achieved by maintaining a dictionary that contains the most recently processed data, and a look-ahead buffer that contains the data to be processed next. The algorithm searches for the longest match between the look-ahead buffer and the dictionary, and replaces it with a reference to the match in the dictionary. Both LZ77 and LZ78 algorithms are widely used in various applications, including file compression, data transmission, and storage systems. They are known for their simplicity, efficiency, and effectiveness in reducing the size of data. However, they are not suitable for compressing data that does not contain repeated occurrences, such as random data.