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Lempel–Ziv–Welch (LZW) is a universal lossless data compression algorithm created by Abraham Lempel, Jacob Ziv, and Terry Welch.It was published by Welch in 1984 as an improved implementation of the LZ78 algorithm published by Lempel and Ziv in 1978.
LZ77 and LZ78 are the two lossless data compression algorithms published in papers by Abraham Lempel and Jacob Ziv in 1977 [1] and 1978. [2] They are also known as Lempel-Ziv 1 (LZ1) and Lempel-Ziv 2 (LZ2) respectively. [3] These two algorithms form the basis for many variations including LZW, LZSS, LZMA and others.
Lempel–Ziv–Markov chain algorithm (LZMA) – Very high compression ratio, used by 7zip and xz; Lempel–Ziv–Storer–Szymanski (LZSS) – Used by WinRAR in tandem with Huffman coding; Lempel–Ziv–Welch (LZW) – Used by GIF images and Unix's compress utility; Prediction by partial matching (PPM) – Optimized for compressing plain text
The Lempel–Ziv complexity corresponds to the number of iterations needed to finish this procedure. Said differently, the Lempel–Ziv complexity is the number of different sub-strings (or sub-words) encountered as the binary sequence is viewed as a stream (from left to right).
Lempel–Ziv–Welch (LZW) is a lossless compression algorithm developed by Abraham Lempel, Jacob Ziv and Terry Welch in 1984. It is used in the GIF format, introduced in 1987. [16] DEFLATE, a lossless compression algorithm developed by Phil Katz and specified in 1996, is used in the Portable Network Graphics (PNG) format. [17]
Terry Archer Welch (January 20, 1939 – November 22, 1988) was an American computer scientist. Along with Abraham Lempel and Jacob Ziv , he developed the lossless Lempel–Ziv–Welch (LZW) compression algorithm , which was published in 1984.
Lempel–Ziv–Welch (LZW) is a lossless compression algorithm developed in 1984. It is used in the GIF format, introduced in 1987. [39] DEFLATE, a lossless compression algorithm specified in 1996, is used in the Portable Network Graphics (PNG) format. [40]
LZWL is a syllable-based variant of the LZW (Lempel-Ziv-Welch) compression algorithm, designed to work with syllables derived from any syllable decomposition algorithm. This approach allows LZWL to efficiently process both syllables and words, offering a nuanced method for data compression.