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229 results on '"Orange Labs [Cesson-Sévigné]"'

201. On the performance of timing synchronization techniques for optical OFDM IMDD transmission

Author

Michel Jezequel, Hao Lin, Luiz Anet Neto, Tuan Anh Truong, Bruno Jahan, Matthieu Arzel, Lab-STICC_TB_CACS_IAS, Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance ( Lab-STICC ), École Nationale d'Ingénieurs de Brest ( ENIB ) -Université de Bretagne Sud ( UBS ) -Université de Brest ( UBO ) -Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques ( IBNM ), Université de Brest ( UBO ) -Université européenne de Bretagne ( UEB ) -ENSTA Bretagne-Institut Mines-Télécom [Paris]-Centre National de la Recherche Scientifique ( CNRS ) -École Nationale d'Ingénieurs de Brest ( ENIB ) -Université de Bretagne Sud ( UBS ) -Université de Brest ( UBO ) -Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques ( IBNM ), Université de Brest ( UBO ) -Université européenne de Bretagne ( UEB ) -ENSTA Bretagne-Institut Mines-Télécom [Paris]-Centre National de la Recherche Scientifique ( CNRS ), Orange Labs - Cesson-Sévigné (Orange), Département Electronique ( ELEC ), Université européenne de Bretagne ( UEB ) -Télécom Bretagne-Institut Mines-Télécom [Paris], Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC), École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), Département Electronique (ELEC), Université européenne de Bretagne - European University of Brittany (UEB)-Institut Mines-Télécom [Paris] (IMT)-Télécom Bretagne, and Télécom Bretagne (devenu IMT Atlantique), Ex-Bibliothèque

Subjects
Orthogonal frequency-division multiplexing, Computer science, [ SPI.SIGNAL ] Engineering Sciences [physics]/Signal and Image processing, 02 engineering and technology, Synchronization, 020210 optoelectronics & photonics, Signal-to-noise ratio, Synchronisation, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, IMDD, Digital signal processing, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing, OFDM, business.industry, Estimator, 020206 networking & telecommunications, [SPI.TRON] Engineering Sciences [physics]/Electronics, [SPI.TRON]Engineering Sciences [physics]/Electronics, [ SPI.TRON ] Engineering Sciences [physics]/Electronics, Optical fiber communication systems, Fibre Channel, Transmission (telecommunications), Optical data processing, Telecommunications, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Intensity modulation
Abstract

International audience; By means of numerical simulations, we do a comparative study of different timing synchronization techniques for optical OFDM Intensity Modulated/Direct Detected (IMDD) transmission in single-mode fiber channel. Based on Park’s method, we propose some modifications to obtain a more robust timing estimator.

Published
2012
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202. Adapted scheduling of QC-LDPC decoding for multistandard receivers

Author

Michel Jezequel, Jean Dion, Matthieu Arzel, Marie-Helene Hamon, Pierre Penard, Lab-STICC_TB_CACS_IAS, Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC), École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), Orange Labs - Cesson-Sévigné (Orange), Département Electronique (ELEC), Université européenne de Bretagne - European University of Brittany (UEB)-Institut Mines-Télécom [Paris] (IMT)-Télécom Bretagne, Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance ( Lab-STICC ), École Nationale d'Ingénieurs de Brest ( ENIB ) -Université de Bretagne Sud ( UBS ) -Université de Brest ( UBO ) -Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques ( IBNM ), Université de Brest ( UBO ) -Université européenne de Bretagne ( UEB ) -ENSTA Bretagne-Institut Mines-Télécom [Paris]-Centre National de la Recherche Scientifique ( CNRS ) -École Nationale d'Ingénieurs de Brest ( ENIB ) -Université de Bretagne Sud ( UBS ) -Université de Brest ( UBO ) -Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques ( IBNM ), Université de Brest ( UBO ) -Université européenne de Bretagne ( UEB ) -ENSTA Bretagne-Institut Mines-Télécom [Paris]-Centre National de la Recherche Scientifique ( CNRS ), Département Electronique ( ELEC ), and Université européenne de Bretagne ( UEB ) -Télécom Bretagne-Institut Mines-Télécom [Paris]

Subjects
Computer science, Real-time computing, Turbo code, List decoding, [ SPI.SIGNAL ] Engineering Sciences [physics]/Signal and Image processing, 02 engineering and technology, Data_CODINGANDINFORMATIONTHEORY, 01 natural sciences, Scheduling (computing), 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Wireless, Architecture parallèle, Forward error correction, Low-density parity-check code, Code correcteur erreur, 010302 applied physics, LDPC codes, business.industry, Ldpc decoding, [ SPI.TRON ] Engineering Sciences [physics]/Electronics, 020202 computer hardware & architecture, [SPI.TRON]Engineering Sciences [physics]/Electronics, Implementation, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Computer hardware, Decoding methods
Abstract

International audience; Wireless and PLC standards have to cope with noisy channels. The advanced FEC codes like LDPC and turbo codes are the most competitive ones. Multi-standards devices (such as mobile phones with cellular and WiFi) are becoming more and more attractive but raise the issue of duplicating hardware. Trellis decoding is a good solution to mutualize material and to achieve good hroughputs on FEC multi-standard decoders. Such a technique added with natural parallelism underlines access memory conflicts on the LDPC decoding process, which decreases the decoding performance. This paper presents an optimized trellis design to avoid these access conflicts with no loss in decoding performance.

Published
2012
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203. New Optimizations for Layered Non-Binary LDPC Codes Decoding

Author

Sanae El Hassani, Ramesh Pyndiah, Frederic Guilloud, Marie-Helene Hamon, Pierre Penard, ENSA El-Jadida (.), Lab-STICC_TB_CACS_COM, Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC), École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), Département Signal et Communications (SC), Université européenne de Bretagne - European University of Brittany (UEB)-Télécom Bretagne-Institut Mines-Télécom [Paris] (IMT), Orange Labs - Cesson-Sévigné (Orange), Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance ( Lab-STICC ), École Nationale d'Ingénieurs de Brest ( ENIB ) -Université de Bretagne Sud ( UBS ) -Université de Brest ( UBO ) -Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques ( IBNM ), Université de Brest ( UBO ) -Université européenne de Bretagne ( UEB ) -ENSTA Bretagne-Institut Mines-Télécom [Paris]-Centre National de la Recherche Scientifique ( CNRS ) -École Nationale d'Ingénieurs de Brest ( ENIB ) -Université de Bretagne Sud ( UBS ) -Université de Brest ( UBO ) -Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques ( IBNM ), Université de Brest ( UBO ) -Université européenne de Bretagne ( UEB ) -ENSTA Bretagne-Institut Mines-Télécom [Paris]-Centre National de la Recherche Scientifique ( CNRS ), Département Signal et Communications ( SC ), Université européenne de Bretagne ( UEB ) -Télécom Bretagne-Institut Mines-Télécom [Paris], and Télécom Bretagne (devenu IMT Atlantique), Ex-Bibliothèque

Subjects
Layered Decoding, Binary number, Serial concatenated convolutional codes, Sequential decoding, [ SPI.SIGNAL ] Engineering Sciences [physics]/Signal and Image processing, Data_CODINGANDINFORMATIONTHEORY, Scheduling (computing), Soft-decision decoder, Non-Binary LDPC, Low-density parity-check code, Binary case, Algorithm, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Simulation, Decoding methods, Mathematics, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing
Abstract

International audience; Non-binary LDPC codes have interesting performances, especially for short to moderate blocklengths. The decoding schedule of these codes decoding, similarly to the binary case, has an important impact on the decoder's behaviour and should be carefully designed. This paper studies and optimizes the layered scheduling of non-binary LDPC codes following two approaches: A static approach, defining an optimized permanent scheduling for the decoder independently of its entries or state, and a dynamic approach adapting the scheduling on the fly following the decoder's convergence. These two approaches show either a reduction in the number of iterations of about 18% or a reduction in signal to noise ratio of about 0.05dB.

Published
2012

204. SANA: A Service-Aware Naming Architecture for future Internet

Author

Jean-Marie Bonnin, Philippe Bertin, Nahla Abid, Département Réseaux, Sécurité et Multimédia (RSM), Université européenne de Bretagne - European University of Brittany (UEB)-Télécom Bretagne-Institut Mines-Télécom [Paris] (IMT), and Orange Labs - Cesson-Sévigné (Orange)

Subjects
Service (systems architecture), Computer science, business.industry, 05 social sciences, [INFO.INFO-MM]Computer Science [cs]/Multimedia [cs.MM], 050801 communication & media studies, 020206 networking & telecommunications, 02 engineering and technology, World Wide Web, Identifier, Identification (information), [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], 0508 media and communications, 0202 electrical engineering, electronic engineering, information engineering, Key (cryptography), The Internet, Mobile telephony, Session (computer science), Architecture, business
Abstract

International audience; Due to the increasingly diverse environment expected for users and the proliferation of mobile and wireless terminals in the future Internet, special attention should be paid to person-to-person communications and multi-device support in future naming schemes' design. In this paper, we present a new naming proposal that we call Service-Aware Naming Architecture (SANA). Our solution is built around three key points. First, we challenge the traditional Identifier/Locator split paradigm by getting rid of terminals' identifiers and promoting users and services identification. Second, we provide a transparent multi-device support to the network. And finally, we make user's session switching between different terminals agnostic to applications and networks.

Published
2011
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205. Efficient compression method for integral images using multi-view video coding

Author

Gérard Madec, Patrick Gioia, Shasha Shi, Département Image et Traitement Information (ITI), Université européenne de Bretagne - European University of Brittany (UEB)-Télécom Bretagne-Institut Mines-Télécom [Paris] (IMT), Orange Labs [Cesson-Sévigné], and Orange Labs

Subjects
Image compression, Computer science, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, Data_CODINGANDINFORMATIONTHEORY, 02 engineering and technology, Integral imaging, Video quality, 01 natural sciences, 010309 optics, Sub-images, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Computer vision, Lossless compression, Motion compensation, business.industry, Data compression ratio, Block Truncation Coding, Multi-view coding (MVC), Video compression picture types, 020201 artificial intelligence & image processing, Artificial intelligence, Multiview Video Coding, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Context-adaptive binary arithmetic coding, Data compression
Abstract

International audience; Integral imaging is an attractive auto-stereoscopic three dimensional (3D) technique for next generation 3DTV. To improve its video quality, new techniques are required to effectively compress the huge volume of integral image (II) data. In this paper, a new compression method implemented by multi-view video coding (MVC) is provided and used for sub-images (SI). SI is an alternative form of 2D image transformed from original II. Each SI represents the 3D scene from parallel viewing directions and contains superior compression capabilities than original captured elemental images (EI). For this reason, we consider arranging the group of SIs as the format of multi-view video (MVV) and then encode the generated MVV by MVC standard. Experimental results show that our proposed compression approach improves the compression efficiency when compared to the traditional MPEG-4/AVC compression method for II.

Published
2011
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206. High efficient computational integral imaging reconstruction based on parallel-group projection (PGP) method

Author

Shasha Shi, Patrick Gioia, Gérard Madec, Orange Labs [Cesson-Sévigné], Orange Labs, Département Image et Traitement Information (ITI), and Université européenne de Bretagne - European University of Brittany (UEB)-Télécom Bretagne-Institut Mines-Télécom [Paris] (IMT)

Subjects
sub image, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, 02 engineering and technology, Integral imaging, 01 natural sciences, Image (mathematics), 010309 optics, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Computer vision, Point (geometry), Projection (set theory), Mathematics, ComputingMethodologies_COMPUTERGRAPHICS, Pixel, business.industry, Plane (geometry), 020206 networking & telecommunications, Viewing angle, Ray, parallel-group projection, Artificial intelligence, computational reconstruction, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Abstract

International audience; Integral imaging is an auto-stereoscopic 3D technique presenting remarkable advantages over classical stereo. In this paper we propose a new computational integral imaging reconstruction (CIIR) technique based on parallel-Group Projection (PGP) method to improve the performance of CIIR. Different from previous CIIR techniques which project each point of integral image (II) to the reconstructed plane pixel by pixel, the proposed method reconstruct the 3D image by mapping a series of sub image (SI) onto the reconstructed plane successively, where each SI records pixels from parallel light rays with identical viewing angle. According to experimental results, this approach is able to simplify the calculation of reconstruction process and improve the quality of reconstructed 3D image.

Published
2011
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207. Images compression based on multi-view video plus depth (MVD) representation

Author

Shi, Shasha, Madec, Gérard, Gioia, Patrick, Département Image et Traitement Information (ITI), Université européenne de Bretagne - European University of Brittany (UEB)-Télécom Bretagne-Institut Mines-Télécom [Paris] (IMT), Orange Labs [Cesson-Sévigné], Orange Labs, and Télécom Bretagne, Bibliothèque

Subjects
multi-view video plus depth (MVD), virtual view rendering, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, subimages, Data_CODINGANDINFORMATIONTHEORY, Integral imaging, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, image compression, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing
Abstract

International audience; Integral imaging is an attractive auto-stereoscopic three dimensional (3D) technique for next generation 3DTV. To improve its video quality, new techniques are required to effectively compress the huge volume of integral image (II) data. In this paper, a new compression method based on Multi-View Video Plus Depth (MVD) representation is provided and used for sub-images (SI) compression. Experimental results show that our proposed compression approach improves the compression efficiency of the traditional MPEG-4/AVC compression method used for II and a recently provided multi-view video coding (MVC) method used for SIs.

Published
2011

208. High quality computational integral imaging reconstruction using view synthesis rendering

Author

Shi, Shasha, Madec, Gérard, Gioia, Patrick, Département Image et Traitement Information (ITI), Université européenne de Bretagne - European University of Brittany (UEB)-Télécom Bretagne-Institut Mines-Télécom [Paris] (IMT), Orange Labs [Cesson-Sévigné], Orange Labs, Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC), École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), and Télécom Bretagne (devenu IMT Atlantique), Ex-Bibliothèque

Subjects
sub image, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, computational reconstruction, Integral imaging, parallel-group projection, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing
Abstract

International audience; Integral imaging is a promising technique for next generation 3DTV, but the limitation of reconstructed 3D image resolution is an important obstacle for its practical utilization. In this paper, we propose a new method to improve the definition of reconstructed 3D image by view synthesize method based on depth map rendering technique. Compare to the previous techniques, our method provides more accurate synthesized images which reproduce the 3D scene with enhanced viewing quality.

Published
2011

209. Coded OFDM and OFDM/OQAM for intensity modulated optical wireless systems

Author

Olivier Bouchet, Ramesh Pyndiah, Mamdouh El Tabach, Patrick Tortelier, Orange Labs [Cesson-Sévigné], Orange Labs, Lab-STICC_TB_CACS_COM, Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (UMR 3192) (Lab-STICC), Université européenne de Bretagne - European University of Brittany (UEB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Télécom Bretagne-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université européenne de Bretagne - European University of Brittany (UEB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Télécom Bretagne-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), Département Signal et Communications (SC), and Université européenne de Bretagne - European University of Brittany (UEB)-Télécom Bretagne-Institut Mines-Télécom [Paris] (IMT)

Subjects
business.industry, Orthogonal frequency-division multiplexing, Computer science, 05 social sciences, Physical layer, 050801 communication & media studies, 020206 networking & telecommunications, 02 engineering and technology, Spectral efficiency, Interference (wave propagation), 0508 media and communications, Guard interval, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Optical wireless, Electrical and Electronic Engineering, Telecommunications, business, Intensity modulation, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Communication channel
Abstract

International audience; Infrared optical wireless (OW) is a promising technology associating free-space propagation and infrared radiation for home networks. OW offers several advantages over radio technologies, making it an attractive solution for short range communications. However, OW technology is not as mature as for radio; further advanced studies regarding optical components and physical layer issues are still open. Coded orthogonal modulations such as Coded OFDM (COFDM) are currently used in many radio and fixed transmission systems. Among these modulations, COFDM/OQAM is an interesting alternative to classical COFDM modulation, as it does not require the use of a guard interval and it has an optimal spectral efficiency. In this paper, we present a comparative study of modified COFDM and modified COFDM/OQAM schemes adapted to intensity modulation and direct detection over a diffuse channel based on experimental measurements. If M-ary QAM modulation is used, the two schemes offer the possibility to increase the bit rate of OW communications. They also mitigate the effects of inter symbol interference (ISI). On the other hand, modified COFDM/OQAM could outperform modified COFDM schemes with a cyclic-prefix.

Published
2009
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210. Modèles de génération de trajectoires pour l'animation de visages parlants

Author

Govokhina, Oxana, Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), Orange Labs [Cesson-Sévigné], Orange Labs, Institut National Polytechnique de Grenoble - INPG, and Gérard Bailly

Subjects
animation faciale, concaténation, synthèse audiovisuelle, évaluation, facial animation, audiovisual synthesis, [INFO]Computer Science [cs], coarticulation, HMM
Abstract

The work performed during this thesis concerns visual speech synthesis in the context of humanoid animation. Our study proposes and implements control models for facial animation that generate articulatory trajectories from text. We have used 2 audiovisual corpuses in our work. First of all, we compared objectively and subjectively the main state-of-the-art models. Then, we studied the spatial aspect of the articulatory targets generated by HMM-based synthesis and concatenation-based synthesis that combines the advantages of these methods. We have proposed a new synthesis model named TDA (Task Dynamics for Animation). The TDA system plans the geometric targets by HMM synthesis and executes the computed targets by concatenation of articulatory segments. Then, we have studied the temporal aspect of the speech synthesis and we have proposed a model named PHMM (Phased Hidden Markov Model). The PHMM manages the temporal relations between different modalities related to speech. This model calculates articulatory gestures boundaries as a function of the corresponding acoustic boundaries between allophons. It has been also applied to the automatic synthesis of Cued speech in French. Finally, a subjective evaluation of the different proposed systems (concatenation, HMM, PHMM and TDA) is presented.; Le travail réalisé durant cette thèse concerne la synthèse visuelle de la parole pour l'animation d'un humanoïde de synthèse. L'objectif principal de notre étude est de proposer et d'implémenter des modèles de contrôle pour l'animation faciale qui puissent générer des trajectoires articulatoires à partir du texte. Pour ce faire nous avons travaillé sur 2 corpus audiovisuels. Tout d'abord, nous avons comparé objectivement et subjectivement les principaux modèles existants de l'état de l'art. Ensuite, nous avons étudié l'aspect spatial des réalisations des cibles articulatoires, pour les synthèses par HMM (Hidden Markov Model) et par concaténation simple. Nous avons combiné les avantages des deux méthodes en proposant un nouveau modèle de synthèse nommé TDA (Task Dynamics for Animation). Ce modèle planifie les cibles géométriques grâce à la synthèse par HMM et exécute les cibles articulatoires ainsi générées grâce à la synthèse par concaténation. Par la suite, nous avons étudié l'aspect temporel de la synthèse de la parole et proposé un second modèle de synthèse intitulé PHMM (Phased Hidden Markov Model) permettant de gérer les différentes modalités liées à la parole. Le modèle PHMM permet de calculer les décalages des frontières des gestes articulatoires par rapport aux frontières acoustiques des allophones. Ce modèle a été également appliqué à la synthèse automatique du LPC (Langage Parlé Complété). Enfin, nous avons réalisé une évaluation subjective des différentes méthodes de synthèse visuelle étudiées (concaténation, HMM, PHMM et TDA).

Published
2008

211. Trajectories generation models for talking heads animation

Author

Govokhina, Oxana, Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), Orange Labs [Cesson-Sévigné], Orange Labs, Institut National Polytechnique de Grenoble - INPG, Gérard Bailly, and Govokhina Le Blevec, Oxana

Subjects
animation faciale, concaténation, synthèse audiovisuelle, évaluation, facial animation, audiovisual synthesis, [INFO]Computer Science [cs], coarticulation, [INFO] Computer Science [cs], HMM
Abstract

The work performed during this thesis concerns visual speech synthesis in the context of humanoid animation. Our study proposes and implements control models for facial animation that generate articulatory trajectories from text. We have used 2 audiovisual corpuses in our work. First of all, we compared objectively and subjectively the main state-of-the-art models. Then, we studied the spatial aspect of the articulatory targets generated by HMM-based synthesis and concatenation-based synthesis that combines the advantages of these methods. We have proposed a new synthesis model named TDA (Task Dynamics for Animation). The TDA system plans the geometric targets by HMM synthesis and executes the computed targets by concatenation of articulatory segments. Then, we have studied the temporal aspect of the speech synthesis and we have proposed a model named PHMM (Phased Hidden Markov Model). The PHMM manages the temporal relations between different modalities related to speech. This model calculates articulatory gestures boundaries as a function of the corresponding acoustic boundaries between allophons. It has been also applied to the automatic synthesis of Cued speech in French. Finally, a subjective evaluation of the different proposed systems (concatenation, HMM, PHMM and TDA) is presented., Le travail réalisé durant cette thèse concerne la synthèse visuelle de la parole pour l'animation d'un humanoïde de synthèse. L'objectif principal de notre étude est de proposer et d'implémenter des modèles de contrôle pour l'animation faciale qui puissent générer des trajectoires articulatoires à partir du texte. Pour ce faire nous avons travaillé sur 2 corpus audiovisuels. Tout d'abord, nous avons comparé objectivement et subjectivement les principaux modèles existants de l'état de l'art. Ensuite, nous avons étudié l'aspect spatial des réalisations des cibles articulatoires, pour les synthèses par HMM (Hidden Markov Model) et par concaténation simple. Nous avons combiné les avantages des deux méthodes en proposant un nouveau modèle de synthèse nommé TDA (Task Dynamics for Animation). Ce modèle planifie les cibles géométriques grâce à la synthèse par HMM et exécute les cibles articulatoires ainsi générées grâce à la synthèse par concaténation. Par la suite, nous avons étudié l'aspect temporel de la synthèse de la parole et proposé un second modèle de synthèse intitulé PHMM (Phased Hidden Markov Model) permettant de gérer les différentes modalités liées à la parole. Le modèle PHMM permet de calculer les décalages des frontières des gestes articulatoires par rapport aux frontières acoustiques des allophones. Ce modèle a été également appliqué à la synthèse automatique du LPC (Langage Parlé Complété). Enfin, nous avons réalisé une évaluation subjective des différentes méthodes de synthèse visuelle étudiées (concaténation, HMM, PHMM et TDA).

Published
2008

212. The trainable trajectory formation model TD-HMM parameterized for the LIPS 2008 challenge

Author

Bailly, Gérard, Govokhina, Oxana, Breton, Gaspard, Elisei, Frédéric, Savariaux, Christophe, GIPSA - Machines Parlantes, Agents Communicants & Interaction Face-à-face (GIPSA-MPACIF), Département Parole et Cognition (GIPSA-DPC), Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), Orange Labs [Cesson-Sévigné], Orange Labs, GIPSA-Services (GIPSA-Services), and Bailly, Gérard

Subjects
[INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, [INFO.INFO-TS] Computer Science [cs]/Signal and Image Processing, Computer Science::Sound, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing
Abstract

International audience; We describe here the trainable trajectory formation model that will be used for the LIPS'2008 challenge organized at InterSpeech'2008. It predicts articulatory trajectories of a talking face from phonetic input. It basically uses HMM-based synthesis but asynchrony between acoustic and gestural boundaries - taking for example into account non audible anticipatory gestures - is handled by a phasing model that predicts the delays between the acoustic boundaries of allophones to be synthesized and the gestural boundaries of HMM triphones. The HMM triphones and the phasing model are trained simultaneously using an iterative analysissynthesis loop. Convergence is obtained within a few iterations. Using different motion capture data, we demonstrate here that the phasing model improves significantly the prediction error and captures subtle ontextdependent anticipatory phenomena

Published
2008

213. Procédé de repositionnement des frontières de phonèmes pour la synthèse visuelle des mouvements faciaux liés à la parole

Author

Govokhina, Oxana, Breton, Gaspard, Bailly, Gérard, GIPSA - Machines Parlantes, Agents Communicants & Interaction Face-à-face (GIPSA-MPACIF), Département Parole et Cognition (GIPSA-DPC), Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), Orange Labs [Cesson-Sévigné], Orange Labs, and Bailly, Gérard

Subjects
[INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, [INFO.INFO-TS] Computer Science [cs]/Signal and Image Processing, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing
Published
2008

214. Hydrothermal circulation at slow-spreading mid-ocean ridges: The role of along-axis variations in axial lithospheric thickness

Author

Mathilde Cannat, Javier Escartín, Fabrice J. Fontaine, Orange Labs [Cesson-Sévigné], Orange Labs, Institut de Physique du Globe de Paris (IPGP), Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Université de La Réunion (UR)-Université Paris Diderot - Paris 7 (UPD7)-IPG PARIS-Institut national des sciences de l'Univers (INSU - CNRS)

Subjects
[SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics, geography, geography.geographical_feature_category, 010504 meteorology & atmospheric sciences, Flow (psychology), Geology, Mid-ocean ridge, Geophysics, 010502 geochemistry & geophysics, 01 natural sciences, Hydrothermal circulation, Tectonics, Ridge push, Lithosphere, Ridge, [SDU]Sciences of the Universe [physics], Pressure gradient, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences
Abstract

At several ridge segments along the slow-spreading Mid-Atlantic Ridge, the lithosphere appears to be cooled by centrally located, isolated hydrothermal fields, hundreds of meters wide, extracting as much as 1000 MW from the lithosphere and hosting very large (>106 m3) sulfide edifices. These fields are possibly fueled by subseafloor hydrothermal cells cooling and leaching the lithosphere up to a few tens of kilometers along axis. However, the detailed mechanisms by which such hydrothermal heat extraction takes place are not well constrained. It is postulated that melt focusing and preferred cooling near transforms result in a thinner lithosphere at the center of slow-spreading ridge segments. In this configuration, and with a depth of penetration controlled by brittle lithospheric thickness, the base of the hydrothermal system is not at constant depth. Here we present models of along-axis hydrothermal circulation showing that pressure gradients generated along this basal slope influence flow dynamics. We show that the size of hydrothermal cells increases with the basal slope α. For α 15°–20°, the circulation reaches steady state and is composed of a single cell with a broad recharge and a focused discharge. Although our models make several simplifying assumptions, we propose that along-axis variations in lithosphere thickness associated with the magmatic and tectonic segmentation of slow-spreading ridges should favor the formation of large and centrally located vent fields, mining heat on several kilometers along axis. We also predict that more short-lived and weaker vent fields may develop away from the segment center.

Published
2008
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215. Method for the optimised management of resources in a terminal comprising multiple interface

Author

Guillouard , Karine, Athéo, Stéphane, Blanchet, David, Bonnin, Jean-Marie, Suciu, Lucian, Orange Labs [Cesson-Sévigné], Orange Labs, Département Réseaux, Sécurité et Multimédia (RSM), Université européenne de Bretagne - European University of Brittany (UEB)-Télécom Bretagne-Institut Mines-Télécom [Paris] (IMT), and Télécom Bretagne, Bibliothèque

Subjects
[INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], [INFO.INFO-NI] Computer Science [cs]/Networking and Internet Architecture [cs.NI]
Abstract

(EN) The invention relates to a method for the transmission of data flows through multiple interfaces. The inventive method comprises: at least one step consisting in comparing a maximum throughput value (DM) offered by an interface with a cumulative value (DTF) resulting from a sum of the throughputs attributed to the flows effectively travelling through said interface; and at least one step consisting in switching (STRCOM) a flow to another interface when the maximum throughput value (DM) offered is less than the cumulative value (DTF). The invention can be used to redirect data flows to an interface other than the current interface when a congestion is detected in the comparison step and to perform optimum dynamic management of the resources of different interfaces as a function of the operating conditions of said interfaces. (FR) La présente invention concerne un procédé de transmission de flux de données via de multiples interfaces. Le procédé selon l'invention inclut: au moins une étape de comparaison entre une valeur maximale DM de débit offert par une interface et une valeur cumulée DTF résultant d'une somme de valeurs de débits attribuées aux flux transitant effectivement au travers de ladite interface, et au moins une étape de commutation STRCOM d'un flux vers une autre interface lorsque la valeur maximale DM de débit offert est inférieure à' la valeur cumulée DTF. L'invention permet de rediriger des flux de données vers une interface autre que leur interface courante dès que l'étape de comparaison détecte un encombrement, et donc de réaliser une gestion optimale et dynamique des ressources des diverses interfaces en fonction des conditions de fonctionnement desdites interfaces.

Published
2007

216. Learning optimal audiovisual phasing for a HMM-based control model for facial animation

Author

Govokhina, Oxana, Bailly, Gérard, Breton, Gaspard, Bailly, Gérard, GIPSA - Machines Parlantes, Agents Communicants & Interaction Face-à-face (GIPSA-MPACIF), Département Parole et Cognition (GIPSA-DPC), Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), Orange Labs [Cesson-Sévigné], Orange Labs, Contrat de recherche FT R&D, Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab), and Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)

Subjects
HMM-based synthesis, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Computer Science::Sound, [INFO.INFO-TS] Computer Science [cs]/Signal and Image Processing, trajectory formation system, Audiovisual speech synthesis, facial animation, audiovisual synchronization, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing
Abstract

International audience; We propose here an HMM-based trajectory formation sys- tem that predicts articulatory trajectories of a talking face from phonetic input. In order to add flexibility to the acoustic/ gestural alignment and take into account anticipatory ges- tures, a phasing model has been developed that predicts the delays between the acoustic boundaries of allophones to be synthesized and the gestural boundaries of HMM triphones. The HMM triphones and the phasing model are trained simultaneously using an iterative analysis-synthesis loop. Con- vergence is obtained within a few iterations. We demonstrate here that the phasing model improves significantly the pre- diction error and captures subtle context-dependent antici- patory phenomena.

Published
2007

217. Evaluation de systèmes de génération de mouvements faciaux

Author

Govokhina, Oxana, Bailly, Gérard, Breton, Gaspard, Bagshaw, Paul, Orange Labs [Cesson-Sévigné], Orange Labs, Institut de la communication parlée (ICP), Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3, and Bailly, Gérard

Subjects
[INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, [INFO.INFO-TS] Computer Science [cs]/Signal and Image Processing, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing
Abstract

International audience; This paper presents the implementation and evaluation of different movement generation techniques for speech-related facial movements. State-of-the-art systems are implemented. A novel system that combines HMM-driven pre-selection of diphones with a standard concatenation system is also implemented. The trajectory formation systems are parameterised using the same training material. The groundtruth data consists of facial motion and acoustic signals of one female speaker uttering 238 sentences. Both objective and subjective evaluation of the systems is reported. The objective evaluation observes the linear correlation coefficient between original and predicted movements. It is complemented by an audiovisual preference test where ground-truth and predicted movements drive a 3D virtual clone of the original speaker.

Published
2006

218. TDA: A new trainable trajectory formation system for facial animation

Author

Govokhina, Oxana, Bailly, Gérard, Breton, Gaspard, Bagshaw, Paul, Bailly, Gérard, Orange Labs [Cesson-Sévigné], Orange Labs, Institut de la communication parlée (ICP), Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3, and contrat France Télécoms

Subjects
030507 speech-language pathology & audiology, 03 medical and health sciences, ComputingMethodologies_PATTERNRECOGNITION, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, [INFO.INFO-TS] Computer Science [cs]/Signal and Image Processing, 0202 electrical engineering, electronic engineering, information engineering, 020206 networking & telecommunications, 02 engineering and technology, 0305 other medical science, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing
Abstract

International audience; A new trainable trajectory formation system - named TDA - for facial animation is here proposed that dissociates parametric spaces and methods for movement planning and execution. Movement planning is achieved by HMM-based trajectory formation. This module essentially plans configurations of lip geometry (aperture, spreading and protrusion). Movement execution is performed by concatenation of multi-represented diphones. This module is responsible for selecting and concatenating detailed facial movements that best obey to the target kinematics of the geometry previously planned. Movement planning ensures that the essential visual characteristics of visemes are reached (lip closing for bilabials, rounding and opening for palatal fricatives, etc) and that appropriate coarticulation is planned. Movement execution grafts phonetic details and idiosyncratic articulatory strategies (dissymetries, importance of jaw movements, etc) to the planned gestural score. This planning scheme is compared to alternative planning strategies using articulatory modeling and motion capture data

Published
2006

219. A new trainable trajectory formation system for facial animation

Author

Oxana Govokhina, Pauls Bagshhaw, Gaspard Breton, Gérard Bailly, Bailly, Gérard, Institut de la communication parlée (ICP), Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3, Orange Labs [Cesson-Sévigné], and Orange Labs

Subjects
ComputingMethodologies_PATTERNRECOGNITION, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, business.industry, Computer science, [INFO.INFO-TS] Computer Science [cs]/Signal and Image Processing, Trajectory, Computer vision, Artificial intelligence, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Computer facial animation, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing
Abstract

International audience; A new trainable trajectory formation system for facial animation is here proposed that dissociates parametric spaces and methods for movement planning and execution. Movement planning is achieved by HMM-based trajectory formation. Movement execution is performed by concatenation of multi-represented diphones. Movement planning ensures that the essential visual characteristics of visemes are reached (lip closing for bilabials, rounding and opening for palatal fricatives, etc) and that appropriate coarticulation is planned. Movement execution grafts phonetic details and idiosyncratic articulatory strategies (dissymetries, importance of jaw movements, etc) to the planned gestural score.

Published
2006

220. Turbo4: a high bit-rate chip for turbo code encoding and decoding

Author

Michel Jezequel, Pierre Penard, Lab-STICC_IMTA_CACS_IAS, Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC), École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT), Département Electronique (IMT Atlantique - ELEC), IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), and Orange Labs - Cesson-Sévigné (Orange)

Subjects
[INFO.INFO-AR]Computer Science [cs]/Hardware Architecture [cs.AR], Interleaving, Computer science, Concatenation, 020302 automobile design & engineering, Data_CODINGANDINFORMATIONTHEORY, 02 engineering and technology, Chip, 0203 mechanical engineering, Encoding (memory), Electronic engineering, Turbo code, Encoder, Throughput (business), ComputingMilieux_MISCELLANEOUS, Decoding methods
Abstract

This paper deals with an experimental IC developed for encoding and decoding turbo codes. The chip includes an encoder and a decoding module which performs one iteration of the decoding process. All the necessary interleaving memories and delay-lines are included in the circuit. The encoder is made up of a parallel concatenation of 2 convolutional encoders (constraint length=5) separated by an interleaver (64/spl times/32 matrix). The decoder uses the SOVA technique and a dedicated module achieves the synchronization task as well as a supervision function. Very high level performances can be achieved in 5 iterations: with a QPSK modulation, a BER of 2.E-8 is obtained with Eb/No=2 dB. The turbo4 chip can work in continuous mode up to 54 Mbits/s useful data throughput and is well suited for data flow applications such as video broadcasting. The IC is designed in a 0.25 /spl mu/m CMOS technology and its core size is less than 8 mm/sup 2/.

Published
1999
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221. Characteristics of a sixteen-state turbo-encoder/decoder (Turbo4)

Author

Michel Jezequel, Claude Berrou, Catherine Douillard, Pierre Penard, Lab-STICC_TB_CACS_IAS, Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (UMR 3192) ( Lab-STICC ), Université européenne de Bretagne ( UEB ) -Université de Bretagne Sud ( UBS ) -Université de Brest ( UBO ) -Institut Brestois du Numérique et des Mathématiques ( IBNM ), Université de Brest ( UBO ) -Télécom Bretagne-Institut Mines-Télécom [Paris]-Centre National de la Recherche Scientifique ( CNRS ) -Université européenne de Bretagne ( UEB ) -Université de Bretagne Sud ( UBS ) -Université de Brest ( UBO ) -Institut Brestois du Numérique et des Mathématiques ( IBNM ), Université de Brest ( UBO ) -Télécom Bretagne-Institut Mines-Télécom [Paris]-Centre National de la Recherche Scientifique ( CNRS ), Département Electronique ( ELEC ), IMT Atlantique Bretagne-Pays de la Loire ( IMT Atlantique ), Orange Labs - Cesson-Sévigné (Orange), Télécom Bretagne, Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (UMR 3192) (Lab-STICC), Université européenne de Bretagne - European University of Brittany (UEB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Télécom Bretagne-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université européenne de Bretagne - European University of Brittany (UEB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Télécom Bretagne-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), Département Electronique (ELEC), Université européenne de Bretagne - European University of Brittany (UEB)-Institut Mines-Télécom [Paris] (IMT)-Télécom Bretagne, and Douillard, Catherine

Subjects
[INFO.INFO-AR]Computer Science [cs]/Hardware Architecture [cs.AR], [INFO.INFO-AR] Computer Science [cs]/Hardware Architecture [cs.AR], [ INFO.INFO-IT ] Computer Science [cs]/Information Theory [cs.IT], [ INFO.INFO-TS ] Computer Science [cs]/Signal and Image Processing, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, [INFO.INFO-TS] Computer Science [cs]/Signal and Image Processing, [INFO.INFO-IT]Computer Science [cs]/Information Theory [cs.IT], [INFO.INFO-IT] Computer Science [cs]/Information Theory [cs.IT], Data_CODINGANDINFORMATIONTHEORY, [ INFO.INFO-AR ] Computer Science [cs]/Hardware Architecture [cs.AR], [SPI.TRON] Engineering Sciences [physics]/Electronics, [SPI.TRON]Engineering Sciences [physics]/Electronics, [ SPI.TRON ] Engineering Sciences [physics]/Electronics
Abstract

International audience; This paper presents the characteristics of an integrated circuit called "turbo4" which can be used as a turbo-encoder or as a turbo-decoder. The turbo-encoder is built using a parallel concatenation of two recursive systematic convolutional codes with constraint length K=5. The turbo-decoder is cascadable, each circuit processing one iteration of the turbo-decoding algorithm. It is designed around 2 sixteen-modified Viterbi decoders and 2 matrices of 64 x 32 bits for interleaving and deinterleaving. Some measures for Gaussian and Rayleigh channels and for different coding rates are presented.

Published
1997

222. Une méthode simple de calcul de bancs de filtres/ondelettes bi-orthogonales

Author

Le Bihan, Hervé, Siohan, Pierre, Rioul, Olivier, Duhamel, Pierre, Orange Labs - Cesson-Sévigné (Orange Labs), Orange Labs, 35512 Cesson-Sévigné, France, Orange Labs R&D [Rennes], France Télécom-France Télécom, Laboratoire Traitement et Communication de l'Information (LTCI), Télécom ParisTech-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des signaux et systèmes (L2S), and CentraleSupélec-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)

Subjects
[INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
1993

223. TRANSFORM COEFFICIENT CODING FOR SCREEN CONTENT IN VERSATILE VIDEO CODING (VVC)

Author

Mohsen Abdoli, Pierre Duhamel, Felix Henry, Patrice Brault, Frederic Dufaux, Orange Labs - Cesson-Sévigné, Orange Labs, Laboratoire des signaux et systèmes (L2S), and Université Paris-Sud - Paris 11 (UP11)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)

Subjects
Computer science, 020206 networking & telecommunications, 02 engineering and technology, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Screen content, [INFO.INFO-TI]Computer Science [cs]/Image Processing [eess.IV], 0202 electrical engineering, electronic engineering, information engineering, Source separation, 020201 artificial intelligence & image processing, Entropy encoding, Residual transform coding, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Algorithm, VVC, Transform coding, Random access, Coding (social sciences)
Abstract

International audience; A transform coefficient coding scheme is proposed for 4 × 4 blocks in Versatile Video Coding (VVC), targeting screen content applications. The proposed algorithm, called Unary Bitplane Coding (UBC), uses unary codes of the coefficient amplitudes and represents each block by their bitplanes. This representation allows exploiting further contextual information for source separation during the entropy coding. Experiments in the Joint Exploration test Model (JEM) show that replacing the existing transform coding with UBC only for 4 × 4 blocks brings on average 2.8% and 3.4% BD-R gain in the random access and all intra modes, respectively.

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224. Neurotrophins are expressed in giant cell arteritis lesions and may contribute to vascular remodeling

Author

Elisabeth Vidal, Philippe Bertin, Marie-Odile Jauberteau, C. Le-Jeunne, Anne-Laure Fauchais, Véronique Witko-Sarsat, Kim Heang Ly, Luc Mouthon, Pierre Yves Robert, Philippe Sindou, Alexis Régent, François Labrousse, Antoine P. Brézin, Elsa Molina, Sofiane Saada, Jean-Louis Bourges, Service de Médecine interne A et polyclinique médicale [CHU Limoges], CHU Limoges, Homéostasie Cellulaire et Pathologies (HCP), Université de Limoges (UNILIM)-Génomique, Environnement, Immunité, Santé, Thérapeutique (GEIST FR CNRS 3503)-CHU Limoges, Institut Cochin (IC UM3 (UMR 8104 / U1016)), Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Hôpital Hôtel-Dieu [Paris], CHU Cochin [AP-HP], Service d'Ophtalmologie [CHU Limoges], Orange Labs [Cesson-Sévigné], Orange Labs, Service d'Immunologie et immunogénétique [CHU Limoges], Centre National de la Recherche Scientifique (CNRS)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Hôpital Cochin [AP-HP], and Université de Limoges (UNILIM)-CHU Limoges-Génomique, Environnement, Immunité, Santé, Thérapeutique (GEIST FR CNRS 3503)

Subjects
Male, Pathology, medicine.medical_specialty, Vascular smooth muscle, Giant Cell Arteritis, Immunology, Tropomyosin receptor kinase B, [SDV.BC]Life Sciences [q-bio]/Cellular Biology, Biology, Vascular Remodeling, Vascular remodelling in the embryo, Intimal Hyperplasia, Cohort Studies, [SDV.MHEP.CSC]Life Sciences [q-bio]/Human health and pathology/Cardiology and cardiovascular system, Rheumatology, Neurotrophic factors, immune system diseases, Temporal Artery, Nerve Growth Factor, medicine, Humans, Immunology and Allergy, Nerve Growth Factors, Prospective Studies, cardiovascular diseases, Receptor, skin and connective tissue diseases, Cells, Cultured, Aged, Aged, 80 and over, Middle Aged, medicine.disease, 3. Good health, Temporal Arteries, Giant cell arteritis, Nerve growth factor, Gene Expression Regulation, nervous system, biology.protein, cardiovascular system, Female, Vascular Remodelling, Neurotrophin, Research Article
Abstract

Introduction Giant cell arteritis (GCA) is characterized by intimal hyperplasia leading to ischaemic manifestations that involve large vessels. Neurotrophins (NTs) and their receptors (NTRs) are protein factors for growth, differentiation and survival of neurons. They are also involved in the migration of vascular smooth muscle cells (VSMCs). Our aim was to investigate whether NTs and NTRs are involved in vascular remodelling of GCA. Methods We included consecutive patients who underwent a temporal artery biopsy for suspected GCA. We developed an enzymatic digestion method to obtain VSMCs from smooth muscle cells in GCA patients and controls. Neurotrophin protein and gene expression and functional assays were studied from these VSMCs. Neurotrophin expression was also analysed by immunohistochemistry in GCA patients and controls. Results Whereas temporal arteries of both GCA patients (n = 22) and controls (n = 21) expressed nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), tropomyosin receptor kinase B (TrkB) and sortilin, immunostaining was more intense in GCA patients, especially in the media and intima, while neurotrophin-3 (NT-3) and P75 receptor (P75NTR) were only detected in TA from GCA patients. Expression of TrkB, a BDNF receptor, was higher in GCA patients with ischaemic complications. Serum NGF was significantly higher in GCA patients (n = 28) vs. controls (n = 48), whereas no significant difference was found for BDNF and NT-3. NGF and BDNF enhanced GCA-derived temporal artery VSMC proliferation and BDNF facilitated migration of temporal artery VSMCs in patients with GCA compared to controls. Conclusions Our results suggest that NTs and NTRs are involved in vascular remodelling of GCA. In GCA-derived temporal artery VSMC, NGF promoted proliferation and BDNF enhanced migration by binding to TrkB and p75NTR receptors. Further experiments are needed on a larger number of VSMC samples to confirm these results. Electronic supplementary material The online version of this article (doi:10.1186/s13075-014-0487-z) contains supplementary material, which is available to authorized users.

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225. Chapter 9. Universal DVB-3GPP broadcast layer, an enabler for new business in mobile broadcasting landscape

Author

Christian Gallard, Jean-Luc Sicre, Matthieu Crussière, Catherine Douillard, Gérard Faria, Orange Labs [Cesson-Sévigné], Orange Labs, Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Lab-STICC_TB_CACS_IAS, Département Electronique ( ELEC ), Université européenne de Bretagne ( UEB ) -Télécom Bretagne-Institut Mines-Télécom [Paris]-Université européenne de Bretagne ( UEB ) -Télécom Bretagne-Institut Mines-Télécom [Paris], Teamcast, entreprise, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC), École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), and Nantes Université (NU)-Université de Rennes 1 (UR1)

Subjects
[SPI]Engineering Sciences [physics], DVB, 3GPP, Mobile multimedia, DVB-NGH, Convergence, Mobile TV, Common broadcasting specifications (CBS), E-MBMS
Abstract

This chapter aims at promoting the tremendous asset a cooperation of broadband and broadcast deliveries could provide to cope with the data tsunami announced for the mobile access networks. A clever blend of state-of-the-art 3GPP and DVB standards has been designed to provide a broadcast overlay optimized for mobile and operated in conjunction with a broadband unicast access. This chapter highlights the win-win situation for each actor of the multimedia value chain, which should result from such broadband/broadcast cooperation.

226. FBMC/OQAM baseband for 5G mobile communication systems: hardware design and on-board prototyping

Author

Jérémy Nadal, Charbel ABDEL NOUR, Amer Baghdadi, Hao Lin, Lab-STICC_TB_CACS_IAS, Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC), École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), Département Electronique (ELEC), Université européenne de Bretagne - European University of Brittany (UEB)-Institut Mines-Télécom [Paris] (IMT)-Télécom Bretagne, Orange Labs - Cesson-Sévigné (Orange), Télécom Bretagne (devenu IMT Atlantique), Ex-Bibliothèque, Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance ( Lab-STICC ), École Nationale d'Ingénieurs de Brest ( ENIB ) -Université de Bretagne Sud ( UBS ) -Université de Brest ( UBO ) -Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques ( IBNM ), Université de Brest ( UBO ) -Université européenne de Bretagne ( UEB ) -ENSTA Bretagne-Institut Mines-Télécom [Paris]-Centre National de la Recherche Scientifique ( CNRS ) -École Nationale d'Ingénieurs de Brest ( ENIB ) -Université de Bretagne Sud ( UBS ) -Université de Brest ( UBO ) -Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques ( IBNM ), Université de Brest ( UBO ) -Université européenne de Bretagne ( UEB ) -ENSTA Bretagne-Institut Mines-Télécom [Paris]-Centre National de la Recherche Scientifique ( CNRS ), Département Electronique ( ELEC ), and Université européenne de Bretagne ( UEB ) -Télécom Bretagne-Institut Mines-Télécom [Paris]

Subjects
FBMC, [ SPI.SIGNAL ] Engineering Sciences [physics]/Signal and Image processing, FPGA prototyping, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, [SPI.TRON] Engineering Sciences [physics]/Electronics, Multiple access, 5G, [ SPI.TRON ] Engineering Sciences [physics]/Electronics, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing, OFDM, [SPI.TRON]Engineering Sciences [physics]/Electronics
Abstract

International audience; In this talk we present a new design and prototyping experience of an advanced communication system based on filter-bank multi-carrier and offset-quadrature-amplitude modulation (FBMC/OQAM). This modulation is being studied and considered nowadays by recent research projects as a key enabler for the future flexible 5G air interface. It exhibits better spectrum shape compared to the traditional OFDM (Orthogonal Frequency-Division Multiplexing) and enables better spectrum usage and mobility support. In this context, a complete and efficient hardware implementation on an FPGA-based digital baseband (DBB) platform is proposed. This work is done in the framework of METIS (Mobile and wireless communications Enablers for the Twenty-twenty Information Society, ICT-317669), the EU flagship 5G project, with the objective of laying the foundation for 5G systems and building consensus prior to standardization.

227. Filtrage adaptatif de signaux définis sur des graphes de grande taille

Author

Chedemail, Elie, De Loynes, Basile, Navarro, Fabien, Olivier, Baptiste, Ecole Nationale de la Statistique et de l'Analyse de l'Information [Bruz] (ENSAI), Orange Labs [Cesson-Sévigné], and Orange Labs

Subjects
[INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, [STAT.ML]Statistics [stat]/Machine Learning [stat.ML], [STAT.ME]Statistics [stat]/Methodology [stat.ME], ComputingMilieux_MISCELLANEOUS
Abstract

National audience

228. Séparation de sources appliquée à un contenu ambisonique : localisation et extraction des champs directs

Author

Mathieu Baque, Alexandre Guérin, Manuel Melon, Orange Labs [Cesson-Sévigné], Orange Labs, Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), and MELON, Manuel

Subjects
[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [SPI.ACOU] Engineering Sciences [physics]/Acoustics [physics.class-ph]
Abstract

International audience; Dans un précédent article, il aété montré que l'algorithme d'Analyse en Composantes Indépendantes (ACI) appelé Entropy Rate Bound Minimization (ERBM) permettait de localiser et d'extraire de manière aveugle des sources sonores dans des contenus multicapteurs ambisoniques simulés numériquement. Il aétéégalement mis enévidence que cette décomposition du champ sonore restait efficiente en présence de premières réflexions et de réverbération tardive simulées par lancer de rayons. Dans cet article, l'étude est prolongée sur des signaux réels enregistrés avec un microphone ambisonique du marché dans des conditions acoustiques variables, de faiblementà moyennement réverbérantes. L'application d'ERBMà ces signaux permet une localisation précise des sources présentes dans le mélange, quels que soient le temps de réverbération et l'énergie des premières réflexions. Sur la base de cette localisation, uneétape de formation de voie sous contrainte permet de réaliser une séparation des champs directs associésà chaque source, avec un score signal-sur-interférence compris entre 10 et 25 dB.

229. Procédé de génération d'un signal multiporteuse, dispositif et programme d'ordinateur correspondant

Author

Naila Lahbabi, Hao Lin, Charbel Abdel Nour, Catherine Douillard, Département Electronique (IMT Atlantique - ELEC), IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Lab-STICC_IMTA_CACS_IAS, Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC), Institut Mines-Télécom [Paris] (IMT)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-École Nationale d'Ingénieurs de Brest (ENIB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-Institut Mines-Télécom [Paris] (IMT)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-École Nationale d'Ingénieurs de Brest (ENIB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL), Orange Labs [Cesson-Sévigné], Orange Labs, École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), and Institut Mines-Télécom [Paris] (IMT)

Subjects
Modulation multi-porteuses, Codage correcteur d'erreurs, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Transmission Faster than Nyquist, Poinçonnage
Abstract

L'invention concerne un procédé de génération d'un signal multiporteuse, formé d'une succession temporelle de symboles multiporteuses, mettant en oeuvre les étapes suivantes, pour la génération d'au moins un bloc de symboles multiporteuses : - codage d'un ensemble d'éléments d'information, délivrant un ensemble d'éléments codés, - poinçonnage d'un premier sous-ensemble d'éléments codés, selon un premier motif de poinçonnage, délivrant un premier sous-ensemble d'éléments codés poinçonnés, - poinçonnage (d'un deuxième sous-ensemble d'éléments codés, complémentaire dudit premier sous-ensemble, selon un deuxième motif de poinçonnage, délivrant un deuxième sous-ensemble d'éléments codés poinçonnés, - mappage, sur au moins un symbole complexe, des éléments codés poinçonnés desdits premier et deuxième sous-ensemble d'éléments codés poinçonnés, - génération dudit bloc de symboles multiporteuses, à partir dudit au moins un symbole complexe.

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