Stage - Fpga Audio Processing Core For Diy 3D-Printed Ambisonic Microphone H/F INRIA

Stage - FPGA Audio Processing Core for DIY 3D-Printed Ambisonic Microphone
Le descriptif de l'offre ci-dessous est en Anglais
Type de contrat : Convention de stage

Niveau de diplôme exigé : Bac +4 ou équivalent

Fonction : Stagiaire de la recherche

A propos du centre ou de la direction fonctionnelle

The Inria research centre in Lyon is the 9th Inria research centre, formally created in January 2022. It brings together approximately 300people in 19 research teams and research support services.

Its staff are distributed at this stage on 2 campuses: in Villeurbanne La Doua (Centre / INSA Lyon / UCBL) on the one hand, and Lyon Gerland (ENS de Lyon) on the other.

The Lyon centre is active in the fields of software, distributed and high-performance computing, embedded systems, quantum computing and privacy in the digital world, but also in digital health and computational biology.

Contexte et atouts du poste

This internship will be carried out in the context of the 3DREAM project () which brings together the Emeraude team at CITI lab (Inria/INSA Lyon) and LMFA's Acoustics Team at École Centrale de Lyon, towards developing an open-source, DIY ambisonic microphone. The end goal is to create a low-cost, waterproof, and field-ready prototype for autonomous recording in challenging environments (e.g., bio-acoustics, eco-acoustics applications, etc.).

This microphone will be based on MEMS capsules and an FPGA (Field-Programmable Gate Array), leveraging recent work of the Emeraude team on using this kind of processing platform for real-time audio DSP tasks [1].

The intern will focus on FPGA-based real-time audio processing, working alongside another intern responsible for hardware prototyping. The project builds on the SMALL library () and the Syfala Toolchain () towards providing a robust, open-source solution for researchers and makers.

References

[1] Maxime Popoff. Compilation of real-time audio DSP on FPGA. PhD thesis, INSA de Lyon, December 2024.

Mission confiée

- Interfacing MEMS microphones with an FPGA prototyping board.
- Writing a PCM transceiver in VHDL for decoding the signals produced by the MEMS microphones on the FPGA.
- Enabling multichannel audio recording on an SD card on the FPGA.
- Enabling multichannel real-time audio transmission over Ethernet on the FPGA.
- Potentially carrying out on-board audio DSP on the FPGA using the Syfala framework.

Principales activités

- Write a final report.
- Deliver source code for the project.
- Collaborate with the other intern working on hardware.
- Make a microphone prototype in collaboration with the other intern.
- Potentially write a scientific paper.

Compétences

Technical skills and level required :

Languages :

Relational skills :

Other valued appreciated :

Avantages

- Subsidized meals
- Partial reimbursement of public transport costs
- Leave: 7 weeks of annual leave + 10 extra days off due to RTT (statutory reduction in working hours) + possibility of exceptional leave (sick children, moving home, etc.)
- Possibility of teleworking (after 6 months of employment) and flexible organization of working hours
- Professional equipment available (videoconferencing, loan of computer equipment, etc.)
- Social, cultural and sports events and activities
- Access to vocational training
- Social security coverage under conditions

Rémunération

Recruitment by the CNRS within an Inria team.

Internship remuneration in accordance with the CNRS employment framework.