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| | LZW compression algorithm - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-10-20) |
 | | The algorithm is derived from the LZ77 algorithm presented by Abraham Lempel and Jacob Ziv in a paper entitled "A Universal Algorithm for Sequential Data Compression" in the IEEE Transactions on Information Theory, May 1977. |
 | | LZ78 was covered by US patent 4,464,650 by Lempel, Ziv, Cohn, and Eastman, assigned to Sperry Corporation, later Unisys Corporation, filed on August 10, 1981, and presumably now expired. |
 | | Two US patents were issued for the LZW algorithm: 4,814,746 by Victor S. Miller and Mark N. Wegman and assigned to IBM, originally filed on June 1, 1983, and 4,558,302 by Welch, assigned to Sperry Corporation, later Unisys Corporation, filed on June 20, 1983. |
| www.encyclopedia-online.info /LZW (861 words) |
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