Overall Objectives
New Software and Platforms
Partnerships and Cooperations
Bibliography
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## Section: Partnerships and Cooperations

### National Initiatives

#### Labex Comin Labs projects

CominLabs is a Laboratoire d'Excellence funded by the PIA (Programme Investissements d'Avenir) in the broad area of telecommunications.

• HEMISFER (2014-2017) and HEMISFER-CLINICAL (2018-2019)

Participant : Rémi Gribonval.

• Acronym: HYBRID (Hybrid Eeg-MrI and Simultaneous neuro-feedback for brain Rehabilitation)

• Research axis: 3.1

• CominLabs partners : EMPENN, HYBRID and PANAMA Inria project-teams;

• External partners : EA 4712 team from University of Rennes I; ATHENA Inria project-team, Sophia-Antipolis;

• Coordinator: Christian Barillot, EMPENN Inria project-team

• Description: The goal of HEMISFER is to make full use of neurofeedback paradigm in the context of rehabilitation and psychiatric disorders. The major breakthrough will come from the use of a coupling model associating functional and metabolic information from Magnetic Resonance Imaging (fMRI) to Electro-encephalography (EEG) to "enhance" the neurofeedback protocol. We propose to combine advanced instrumental devices (Hybrid EEG and MRI platforms), with new man-machine interface paradigms (Brain computer interface and serious gaming) and new computational models (source separation, sparse representations and machine learning) to provide novel therapeutic and neuro-rehabilitation paradigms in some of the major neurological and psychiatric disorders of the developmental and the aging brain (stroke, attention-deficit disorder, language disorders, treatment-resistant mood disorders, ...).

• Contribution of PANAMA: PANAMA, in close cooperation with the EMPENN team, contributes to a coupling model between EEG and fMRI considered as a joint inverse problem addressed with sparse regularization. By combining both modalities, one expects to achieve a good reconstruction both in time and space. This new imaging technique will then be used for improving neurofeedback paradigms in the context of rehabilitation and psychiatric disorders, which is the final purpose of the HEMISFER project.

• TEPN

Participant : Rémi Gribonval.

• Acronym: TEPN (Toward Energy Proportional Networks)

• Research axis: 3.1

• CominLabs partners : IRISA OCIF - Telecom Bretagne; IETR SCN; IETR SCEE; PANAMA Inria project-team

• Coordinator: Nicolas Montavont, IRISA OCIF - Telecom Bretagne

• Description: As in almost all areas of engineering in the past several decades, the design of computer and network systems has been aimed at delivering maximal performance without regarding to the energy efficiency or the percentage of resource utilization. The only places where this tendency was questioned were battery-operated devices (such as laptops and smartphones) for which the users accept limited (but reasonable) performance in exchange for longer use periods. Even though the end users make such decisions on a daily basis by checking their own devices, they have no way of minimizing their energy footprint (or conversely, optimize the network resource usage) in the supporting infrastructure. Thus, the current way of dimensioning and operating the infrastructure supporting the user services, such as cellular networks and data centers, is to dimension for peak usage. The problem with this approach is that usage is rarely at its peak. The overprovisioned systems are also aimed at delivering maximal performance, with energy efficiency being considered as something desired, but non-essential. This project aims at making the network energy consumption proportional to the actual charge of this network (in terms of number of served users, or requested bandwidth). An energy proportional network can be designed by taking intelligent decisions (based on various constraints and metrics) into the network such as switching on and off network components in order to adapt the energy consumption to the user needs. This concept can be summarized under the general term of Green Cognitive Network Approach.

• Contribution of PANAMA: PANAMA, in close cooperation with the SCEE team at IETR (thesis of Marwa Chafii, 2016), focuses on the design of new waveforms for multi carrier systems with reduced Peak to Average Power Ratio (PAPR).

• FAWI (2019-2020)

Participant : Rémi Gribonval.

• This project is a follow-up to TEPN. Its main goal is to implement a prototype demonstrating concretely the feasibility of the new Fourier Adaptive Waveform modulation which has been patented [62].

• Contribution of PANAMA: to provide initial training to the recruited engineer in charge of the implementation.

• Partners: PANAMA, IETR.

• Funding: 18 months of engineer, hosted by IETR.

• SPARSE (2019)

Sparse representations in continuous dictionaries

Participants : Rémi Gribonval, Clément Elvira, Clément Merdrignac.

• This short exploratory action aims to explore the new paradigm of sparse representations in “continuous” dictionaries.

• Contribution of PANAMA: to design algorithms for the sparse representation problem in continuous dictionaries with theoretical success guarantees.

• Partners: PANAMA, SIMSMART (Inria-Rennes), ENSTA Bretagne, IMT Atlantique.

• Funding: 5.6kEuros (internship + travel)

#### ANR INVATE project with IRT b-com, Rennes

Participants : Rémi Gribonval, Nancy Bertin, Mohammed Hafsati.

• Thesis on 3D audio scene decomposition for interactive navigation

• Duration: 3 years (2016-2019)

• Research axis: 3.2.2

• Partners: IRT b$<>$com; Inria-Rennes; IRISA

• Funding: ANR INVATE project (PIA)

The objective of this thesis is to develop tools to analyze audio scenes in order to identify, locate, and extract the sources present in the scene to re-spatialize them according to the user head orientation and the movement of the user in the targeted virtual scene.

#### ANR OATMIL project

Participants : Rémi Gribonval, Antoine Chatalic, Nicolas Courty.

• Duration: 4 years (2017-2021)

• Acronym: OATMIL (Bringing Optimal Transport and Machine Learning Together)

• Research Axis 3.1

• Partners: Obelix team and PANAMA Inria project-team, IRISA; LITIS, Rouen; Lagrange Laboratory, Nice; Technicolor R&I France, Rennes.

• Coordinator: Nicolas Courty (Obelix team)

• Description: The OATMIL project will propose novel concepts, methodologies, and new tools for exploiting large data collections. This will result from a cross-fertilization of fundamental tools and ideas from optimal transport (OT) and machine learning (ML). The main objective of OATMIL is to develop new techniques for large-scale machine learning, encompassing adaptability, scalability, and robustness, by a cross-fertilization of ideas coming from OT and ML. This cross-fertilization leads to two complementary scientific challenges : bringing OT to ML and bringing ML to OT.

• Contribution of PANAMA: PANAMA will explore the use of dimension-reduction with sketching strategies in the context compressive optimal transport.

• Funding: ANR

#### Collaboration with 5th dimension – dynamic separation of localized sound sources

Participants : Nancy Bertin, Ewen Camberlein, Romain Lebarbenchon.

After a first phase of this contract which involved porting in C++ a subset of our source localization library Multichannel BSS Locate (Oct.-Nov. 2018, in collaboration with InriaTech), a second phase was realized in 2019 with support from LABEX AMIES. We specified and recorded new data adapted to the partner's use case (microphones on glasses temples) and investigated the interplay between localization and separation, using the FASST library, on simulated and real data recorded with a prototype.