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Abraham Lempel
Abraham Lempel.JPG
Abraham Lempel in 2007
Born (1936-02-10) 10 February 1936 (age 79)
Lwów, Poland (now Lviv, Ukraine)
Residence Israel
Fields Information theory
Institutions Technion - Israel Institute of Technology
Known for LZ77, LZ78
Notable awards Paris Kanellakis Award (1997)
IEEE Richard W. Hamming Medal (2007)

Abraham Lempel (Hebrew: אברהם למפל‎, born 10 February 1936) is 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).[1] He studied at Technion - Israel Institute of Technology, and received a B.Sc. in 1963, M.Sc. in 1965, and D.Sc. in 1967. Since 1977 he has held the title of full professor. Lempel 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), co-authored by Jacob Ziv.

He is the recipient of the 1998 Golden Jubilee Award for Technological Innovation from the IEEE Information Theory Society;[2] and the 2007 IEEE Richard W. Hamming Medal, for "pioneering work in data compression, especially the Lempel-Ziv algorithm".[3]

Lempel founded HP Labs—Israel in 1994, and served as its director until October 2007.

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]

See also[edit]

References[edit]

External links[edit]


Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Abraham_Lempel — Please support Wikipedia.
This page uses Creative Commons Licensed content from Wikipedia. A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.

61 news items

 
Co.Design
Wed, 06 Aug 2014 04:38:40 -0700

When neighboring pixels are the same color, the run-length is specified followed by the color value. This is called LZW data compression, after its creators Abraham Lempel, Jacob Ziv, and Terry Welch. It means images can be downloaded reasonably ...
 
Dissident Voice
Mon, 02 Dec 2013 10:16:16 -0800

This is the pathetic nature of this Bennington Ad Cut-out Obama. Truly, a defining moment here, and one there, well, compiled, yes, Obama is rotten to the core, but it's easy to play the current events and cultural consumerism game with this poser ...

Jewish Post

Jewish Post
Fri, 05 Apr 2013 14:44:58 -0700

DIGITAL AGE INFORMATION SHARING (1977): Abraham Lempel and Jacob Ziv develop the LZ data compression algorithms. Aside from their trailblazing academic applications, the algorithms become the primary basis of early computer information sharing.

The Times of Israel

The Times of Israel
Sun, 14 Apr 2013 19:27:38 -0700

DIGITAL AGE INFORMATION SHARING (1977): Abraham Lempel and Jacob Ziv develop the LZ data compression algorithms. Aside from their trailblazing academic applications, the algorithms become the primary basis of early computer information sharing.
 
iProgrammer
Fri, 18 Dec 2009 00:00:00 -0800

The breakthrough came in 1977 with a theoretical paper by Jacob Ziv and Abraham Lempel. This paper started the whole subject of dictionary compression but, although it was a very theoretical sounding paper, it is amazing that no-one thought of the ...

RedUSERS

RedUSERS
Wed, 26 Nov 2014 06:01:11 -0800

malware-regin El mismo opera desde 2008, su alta complejidad técnica conduce a la hipótesis de su empleo por parte de algún servicio de inteligencia estatal. Analistas señalan a Estados Unidos y el Reino Unido.
 
Computerworld
Sun, 12 Oct 2014 21:00:29 -0700

Abraham Lempel oraz Jacob Ziv pracujący w Israel Institute of Technology stworzyli algorytmy LZ1 oraz LZ2 umożliwiające bezstratną kompresję danych. W tym czasie nikomu jeszcze nawet nie marzył się Internet. Przełączanie pakietów było w powijakach, ...

Şalom

Şalom
Wed, 19 Jun 2013 06:52:30 -0700

Dijital çağ bilgi paylaşımı (1977): Abraham Lempel ve Jacob Ziv, LZ veri sıkıştırma algoritmasını geliştirdiler. Yarattıkları algoritma devrim niteliğinde olup günümüzün bilgisayar veri paylaşım temellerini oluşturdu. Fotoğraf ve imajları bilgisayarlar ...
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