| Abraham Lempel | |
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 Abraham Lempel in 2007
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| Born | Lvov, Poland |
| Residence |  Israel |
| Fields | Information theory |
| Institutions | Technion - Israel Institute of Technology |
| Known for | LZ77, LZ78 |
| Notable awards | 2007 IEEE Richard W. Hamming Medal |
Abraham Lempel (Hebrew: אברהם למפל, born 10 February 1936 in Lvov, Poland[1]) is an Israeli computer scientist and one of the fathers of the LZ family of lossless data compression algorithms.
He studied at Technion - Israel Institute of Technology, and received B.Sc. in 1963, M.Sc. in 1965, and D.Sc. in 1967. Since 1977 he has held the title of full professor. He is now a professor emeritus in Technion.
His historically important works start with the presentation of the LZ77 algorithm in a paper entitled "A Universal Algorithm for Sequential Data Compression" in the IEEE Transactions on Information Theory (May 1977). This work was co-authored by Jacob Ziv. He has been named the recipient of the 2007 IEEE Richard W. Hamming Medal "For pioneering work in data compression, especially the Lempel-Ziv algorithm."
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Works
The following algorithms are named after Lempel:
- 1977: LZ77 (Lempel–Ziv)
- 1978: LZ78 (Lempel–Ziv)
- 1981: LZR (LZ–Renau)
- 1982: LZSS (LZ-Storer-Szymanski)
- 1984: LZW (Lempel–Ziv–Welch)
- LZS (Lempel–Ziv–Stac)
- 1996 LZO (Lempel–Ziv–Oberhumer)
- 2001: LZMA (Lempel–Ziv–Markov chain Algorithm)
The terms LZX, LHA (LHarc) and LZH do reference Lempel as well.
His works laid the basis for such compressed graphics formats as GIF, TIFF and PNG.
Lempel founded HP Labs—Israel in 1994, and served as its director until October 2007.
Bibliography
- Jacob Ziv, Abraham Lempel (May 1977). "A Universal Algorithm for Sequential Data Compression" (PDF). IEEE Transactions on Information Theory 23 (3): 337–343. doi:. http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1055714.
See also
References
- ^ http://ieeexplore.ieee.org/iel5/12/35042/01671460.pdf (accessed 2008-09-14)
External links
- 2007 IEEE Hamming Medal Recipient: Abraham Lempel.
- DBLP: Abraham Lempel.
- Senior HP Fellow: Abraham Lempel.
- Technion: Computer Science Department: Prof. Abraham Lempel.
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