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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 Because the 1993 paper was the first public introduction of turbo codes (patents remain unpublished until issued), coinventorship credit for the discovery to turbo code is often erroneously given to Glavieux and/or Thitimajshima.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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36 news items


Fri, 27 Nov 2015 01:00:00 -0800

... Gwendoline Jézéquel (jeune globe-trotteuse), Charles Kergaravat (acteur des relations BZH-USA), Claude Berrou (très grosse pointure dans la recherche scientifique), Ronan Le Coadic (sociologue, a publié L'Identité Bretonne en 1998), Anne Quéméré ...


Sat, 14 Nov 2015 19:12:07 -0800

Il y a là Alan Stivell, Irène Frain, Yann Queffélec, Nolwenn Korbell, Marc Le Fur, Jean-Guy Le Floc'h, Christian Troadec, Yannick Martin, Charles Kergaravat, Corinne ar Mero, Jean-Jacques Urvoas, Claude Berrou, Anne-Marie Crolais, Jean-Yves Pennec, ...


Sat, 14 Nov 2015 03:37:30 -0800

lui a demandé, un peu intéressé, Claude Berrou, chercheur brestois et président du jury. « C'est possible ! Mes encadrants australiens sont venus dans la ville finistérienne pour expliquer leur système de pêcherie avec casiers. Les pêcheurs ...


Fri, 06 Nov 2015 20:42:07 -0800

Ce travail de deux ans, mêle des analyses en politique, en économie, sur la musique, la langue, etc. avec Ronan Le Coadic, Alan Stivell, Christian Troadec ou encore Claude Berrou ; des explorations plus intimes et plus sensitives avec Jean-Yves Pennec ...

Le Télégramme

Le Télégramme
Sun, 08 Nov 2015 17:07:31 -0800

C'est une tradition. Chaque année, la région Bretagne met la main à la poche pour récompenser les meilleures thèses publiées par de jeunes chercheurs dans la région. Le jury, présidé cette année par Claude Berrou, le célèbre chercheur de Télécom ...

Côté Brest

Côté Brest
Tue, 10 Nov 2015 01:45:00 -0800

J'envisage également de retourner en Australie dans quelques années pour retravailler le sujet. > La thèse de Katell Hamon à consulter ICI. Katell Hamon avec Bernard Pouliquen, vice-président de la Région Bretagne, et Claude Berrou, chercheur et ...


Fri, 06 Nov 2015 07:06:12 -0800

Ils ont été sélectionnés parmi 66 candidats et ont été élus lauréats du Prix Bretagne Jeune Chercheur 2015. ce vendredi matin, à Brest, à l'Université de Bretagne occidentale, ils ont reçu leur prix, des mains de Claude Berrou, chercheur brestois à l ...

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 ...

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