Abraham Lempel
Abraham Lempel | |
|---|---|
 Lempel in 2007 | |
| Born | 10 February 1936 |
| Died | 4 February 2023 (aged 86) |
| Known for | LZ77 and LZ78 compression algorithms |
| Awards | Paris Kanellakis Award (1997) IEEE Richard W. Hamming Medal (2007) |
| Scientific career | |
| Fields | Information theory |
| Institutions | Technion - Israel Institute of Technology |
Abraham Lempel (Hebrew: אברהם למפל; 10 February 1936 – 4 February 2023)[1] was an Israeli computer scientist and one of the fathers of the LZ family of lossless data compression algorithms.
Biography
[edit]Lempel was born on 10 February 1936 in Lwów, Poland (now Lviv, Ukraine).[2] He studied at Technion - Israel Institute of Technology, and received a B.Sc. in 1963, an M.Sc. in 1965, and a D.Sc. in 1967. Since 1977 he held the title of full professor, and was a professor emeritus at 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), co-authored by Jacob Ziv.
Lempel was the recipient of the 1998 Golden Jubilee Award for Technological Innovation from the IEEE Information Theory Society;[3] and the 2007 IEEE Richard W. Hamming Medal for "pioneering work in data compression, especially the Lempel-Ziv algorithm".[4]
Lempel founded HP Labs—Israel in 1994, and served as its director until October 2007.
Lempel died on 4 February 2023, at age 86.
Works
[edit]The LZ77 and LZ78 algorithms authored by Lempel and Jacob Ziv have led to a number of derivative works, including the Lempel–Ziv–Welch algorithm, used in the GIF image format, and the Lempel-Ziv-Markov chain algorithm, used in the 7-Zip and xz compressors. The algorithms have also been used as originally published in formats such as DEFLATE, used in the PNG image format.
Bibliography
[edit]- Jacob Ziv, Abraham Lempel (May 1977). "A Universal Algorithm for Sequential Data Compression". IEEE Transactions on Information Theory. 23 (3): 337–343. CiteSeerX 10.1.1.118.8921. doi:10.1109/TIT.1977.1055714. S2CID 9267632.
See also
[edit]References
[edit]- ^ מת פרופ' אברהם למפל – האיש ששינה את מדעי המחשב (in Hebrew)
- ^ "IEEE Transactions On Computers: Contributors". Institute of Electrical and Electronics Engineers. December 1970. doi:10.1109/T-C.1970.222867.
{{cite journal}}: Cite journal requires|journal=(help) - ^ "Golden Jubilee Awards for Technological Innovation". IEEE Information Theory Society. Retrieved 30 October 2014.
- ^ "IEEE Richard W. Hamming Medal Recipients" (PDF). IEEE. Archived from the original (PDF) on 20 June 2010. Retrieved 30 October 2014.
External links
[edit]- Abraham Lempel – GHN: IEEE Global History Network
- Abraham Lempel at DBLP Bibliography Server
- Technion: Computer Science Department: Prof. Abraham Lempel Archived 24 November 2020 at the Wayback Machine
- "Abraham Lempel: Senior HP Fellow". Archived from the original on 6 July 2008. Retrieved 9 June 2009.
- Abraham Lempel at the Mathematics Genealogy Project
| International | |
|---|---|
| National | |
| Academics | |
- 1936 births
- 2023 deaths
- Israeli computer scientists
- Modern cryptographers
- Data compression researchers
- Israeli information theorists
- Academic staff of Technion – Israel Institute of Technology
- Members of the United States National Academy of Sciences
- Members of the European Academy of Sciences and Arts
- Jewish scientists
- Scientists from Lviv
- Israeli Jews
- Israeli people of Polish-Jewish descent
- Polish emigrants to Israel