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Claude Berrou (French: [bɛʁu]; born September 23, 1951, Penmarch) is a French professor in electrical engineering at École Nationale Supérieure des Télécommunications de Bretagne, now Telecom-Bretagne. He is the sole inventor of a groundbreaking quasi-optimal error-correcting coding scheme called Turbo codes as evidenced by the sole inventorship credit given on the fundamental patent for turbo codes. The original patent filing for turbo codes issued in the US as US Patent 5,446,747.

A 1993 paper entitled "Near Shannon Limit Error-correcting Coding and Decoding: Turbo-codes" published in the Proceedings of IEEE International Communications Conference[1] was the first public disclosure of turbo codes. This 1993 paper listed three authors because it was formed from three separate submissions that were combined due to space constraints. The three authors listed on the 1993 paper are: Berrou, Glavieux, and Thitimajshima. Because the 1993 paper was the first public introduction of turbo codes (patents remain unpublished until issued), coinventorship credit for the discovery to turbo code is often erroneously given to Glavieux and/or Thitimajshima. While Berrou and Glavieux did go on to do supplemental work on turbo codes, the original development of turbo codes was performed by Berrou alone.

Key research activities[edit]

His current research activities are now concentrated on the application and extension of the Turbo technology in various domains, including his research on Artificial thinking, because the Turbo-decoding has been recognized as a new instance of the very general principle of Belief propagation; one application of this principle has been invented for the decoding of Low-density parity-check codes (LDPC codes also known as Gallager codes, in honor of Robert G. Gallager, who developed the LDPC concept in his doctoral dissertation at MIT in 1960 as a theoretical model whose practical implementation was not widely developed until recently). The Turbo principle is generalized now by Claude Berrou and his lab team for the processing of various functions such as the demodulation, the detection or the equalization using a network of multiple convolution codes working in parallel with probabilistic feedback.

Other subjects of interest include all their possible applications in the field of artificial intelligence, for example with a better understanding of natural biological thinking and memory for the implementation of such model using neural networks for the processing of pulsed signals with software and hardware methods with auto-selected and self-maintained combinations of activation cycles of adjacent neurons.[2]


He is the author or coauthor of several books related to turbocodes and their encoding/decoding methods or implementation devices:

  • (French) Codes et turbocodes (Codes and turbocodes) by Claude Berrou with Karine Amis Cavalec, Alain Glavieux, Matthieu Arzel, Michel Jezequel, Charlotte Langlais, Raphaël Le Bidan, Samir Saoudi, Gérard Battail, Emmanuel Boutillon, Yannick Saouter, Emeric Maury, Christophe Laot, Sylvie Kerouedan, Frédéric Guilloud, and Catherine Douillard. Paris: Springer (2007), 397 p. (Iris), ISBN 978-2-287-32739-1.
  • (French) Codage de canal — des bases théoriques aux turbocodes (Channel encoding — from theoretical grounds to turbocodes) by Alain Glavieux with Patrick Adde, Gérard Battail, Ezio Biglieri, Michel Jezequel, Alain Poli, Sandrine Vaton, Ramesh Pyndiah, Annie Picart, Catherine Douillard, and Claude Berrou. Paris: Hermès Science / Lavoisier (2005), 453 p. (Traité IC2 : Traitement du signal et de l’image), ISBN 2-7462-0953-5.

He wrote many chapters in various books related to turbocodes in US publications, published several articles in various international research magazines with scientific review comities, and made many communications in international conferences with review comities.

During his work on turbocodes and parallel convolutive encoding and decoding, he has authored several registered patents for methods and devices implementing this technology:

  • (French) Procédé de codage convolutif correcteurs d’erreurs pseudo-systématique, procédé de décodage et dispositifs correspondents (Apparatus of pseudo-systematic error-correcting convolutive coding, associated decoding process and devices) by Claude Berrou and Patrick Adde (Institut TELECOM; Telecom Bretagne; France Telecom & TDF), France, April 1991.
  • (French) Procédé de décodage d’un code convolutif à maximum de vraisemblance et pondération des décisions et décodeur correspondent (Apparatus of decoding for a convolutive code with maximum likelihood and weighted decisions, and associated decoder) by Claude Berrou (Institut TELECOM; Telecom Bretagne), France, April 1992.
  • (French) Procédé de codage correcteurs d’erreurs à au moins deux codages convolutifs systématiques en parallèle, procédé de décodage itératif, module de décodage et décodeur correspondents (Apparatus of error-detecting encoding using at least two systematic convolutive encodings in parallel, process of iterative decoding, and associated decoding module and decoder) by Claude Berrou (Institut TELECOM; Telecom Bretagne; France Telecom & TDF), France, April 1992.
  • (French) Décodage itératif de codes produits (Iterative decoding of product codes) by Ramesh Pyndiah, Alain Glavieux and Claude Berrou (Institut TELECOM; Telecom Bretagne; France Telecom), France, November 1993.
  • (French) Dispositif de réception de signaux numériques à structure itérative, module et procédé correspondents (Numeric signals device with iterative structure, associated module and process), by Catherine Douillard, Alain Glavieux, Michel Jezequel and Claude Berrou (Institut TELECOM; Telecom Bretagne; France Telecom & TDF), France, February 1995.
  • (French) Procédé et dispositif de codage convolutif de blocs de données et procédé et dispositif de décodage correspondents (Apparatus and devices for the convolutive encoding of data blocks, and associated process and decoding device) by Claude Berrou and Michel Jezequel (Institut TELECOM; Telecom Bretagne; France Telecom et TDF), France, April 1996.
  • (French) Procédé et dispositif de codage à au moins deux codages en parallèle et permutation améliorée, et procédé et dispositif de décodage correspondents (Apparatus and device for the encoding with at least two parallel encoders and enhanced permutation, and associated process and decoding device) by Claude Berrou and Alain Glavieux (Institut TELECOM; Telecom Bretagne; GET), France, July 1999.
  • (French) Procédé de qualification de codes correcteurs d’erreurs, procédé d’optimisation, codeur, décodeur et application correspondents (Apparatus for the qualification of error-correcting codes, and associated optimization process, encoder, decoder and application) by Claude Berrou, Michel Jezequel and Catherine Douillard (Institut TELECOM; Telecom Bretagne; France Telecom & GET), France September 2001.


He has received several distinctions:[3]

He was nominated for the European Inventor of the Year Award (2006).

He was finally elected a member of the French Academy of Sciences in 2007.

See also[edit]


  1. ^ Berrou, Claude; Glavieux, Alain; Thitimajshima, Punya, Near Shannon Limit Error – Correcting (PDF), retrieved 11 February 2010 
  2. ^ La pensée artificielle (The Artificial Thinking), research project paper by Claude Berrou, ENST Bretagne (2008).
  3. ^ See Claude Berrou's personal biography page on the ENST Bretagne web site (external link below).
  4. ^ "Golden Jubilee Awards for Technological Innovation". IEEE Information Theory Society. Retrieved July 14, 2011. 
  5. ^ "IEEE Richard W. Hamming Medal Recipients" (PDF). IEEE. Retrieved May 29, 2011. 

External links[edit]

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Claude_Berrou — Please support Wikipedia.
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26 news items

EE Times

EE Times
Fri, 15 May 2015 10:36:12 -0700

Gordon Moore gives 'oral history' interview · Marconi Society dubs Gordon Moore, Claude Berrou · Gordon Moore makes prediction about Moore's Law · Intel Chairman Emeritus Gordon Moore to Receive IEEE Founders Medal · Gordon Moore thinks Moore's ...
Law360 (subscription)
Wed, 17 Sep 2014 14:11:36 -0700

France Telecom's patent covers an invention credited to Claude Berrou and was assigned in 1995. The invention, which describes a way to make sure data is transmitted successfully and without errors, benefits everyone who uses mobile devices, Dabney ...
Law360 (subscription)
Mon, 20 Oct 2014 12:28:56 -0700

Law360, San Francisco (October 20, 2014, 3:26 PM ET) -- France Telecom SA fought back Monday against Marvell Semiconductor Inc.'s bid to invalidate a data correction patent after a $1.7 million jury verdict against Marvell, calling up its intellectual ...
Law360 (subscription)
Tue, 30 Sep 2014 16:07:49 -0700

Law360, San Francisco (September 30, 2014, 7:03 PM ET) -- France Telecom SA slammed chipmaker Marvell Semiconductors Inc. as it wrapped its two-week patent infringement trial Tuesday, telling a California federal jury in closing arguments that Marvell ...
Law360 (subscription)
Wed, 24 Sep 2014 14:53:53 -0700

France Telecom sued Marvell in 2012, accusing the chipmaker of infringing a patent assigned to inventor Claude Berrou in 1995 and later acquired by the French firm. The invention, which describes a way to make sure data is transmitted successfully and ...
Futura Sciences
Thu, 10 May 2007 18:21:00 -0700

Claude Berrou est né à Penmarc'h (Finistère) en 1951. Après des classes préparatoires à Brest (Lycée Kerichen) et l'obtention, en 1975, de son diplôme d'ingénieur de l'INP Grenoble (ENSERG), il est recruté par France Télécom pour contribuer à la mise ...
Sun, 04 Nov 2012 23:17:41 -0800

Claude Berrou (en bas, à droite) a constitué son équipe de chercheurs et ingénieurs, dont Vincent Gripon (qui tient le livre), Olivier Dufor, Deok-Hee Kim-Dufor, Benoît Larras, Xiaoran Jiang, Ehsan Sedgh Gooya, Philippe Tigréat, et Behrooz Kamary ...
Law360 (subscription)
Wed, 27 Jun 2012 15:31:49 -0700

According to the lawsuit, the patent's sole inventor, Claude Berrou, was awarded the 2005 Marconi Prize for “having invented turbo codes, thereby solving a data communications puzzle that had evaded researchers for 40 years.” He won other major awards ...

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