Curriculum vitae

Things I have been doing

Work History

LINE Corporation, Speech Team

March 2020 - Present

Senior Researcher — Research and development of speech processing algorithms.


March 2011 - Present

bGeigie dude — Volunteer, designing, manufacturing and writing firmware for car-borne geo-tagged radiation measurement devices as part of a grass-root initiative to monitor fallout from the Fukushima Dai-ichi triple meltdown of March 2011. So far, 15 million measurement points have been collected using this system.

Tokyo Metropolitan University, Ono Laboratory

October 2019 - February 2020

Project Associate Professor — Sound-to-light conversion sensors (Blinkies), and blind source separation with many microphones.

Tokyo Metropolitan University, Ono Laboratory

October 2017 - September 2019

Postdoctoral Fellow — We use sound-to-light conversion sensors to easily build large sound sensing arrays. Applications are in conventional audio processing and large scale monitoring.

EPFL, Audiovisual Communications Laboratory

April 2017 - September 2017

Postdoctoral Researcher — Supervision of students. Prospecting data providers and participants for the Data Jam Days 2017 event at EPFL. Research and experiments in array audio processing.

EPFL, Audiovisual Communications Laboratory

September 2012 - March 2017

Research Assistant — Investigating how strucutral aspects of sound propagation, the echoes in a room for example, can provide more robust and efficient algorithms for problems such as beamforming, direction of arrival, or source separation. In a different line of work, I apply techniques from information theory and theoretical computer science to provide low-complexity algorithms for signal processing problems.

NEC Corporation, Media & Information Processing Laboratory

January 2011 - August 2012

Research Engineer — Development of new algorithms for single-microphone speech denoising techniques based on spectral subtraction for application in consumer electronics. Specifically, speech harmonics preservation, DCT-based spectral subtraction, wind noise suppression.

IBM Research — Zürich, Systems Software Group

February 2009 - September 2010

Research Engineer — Developed algorithms for the computation of the continuous Haar, Fourier and cosine transforms of rectilinear polygons found in IC layouts. Derived the theoretical computational complexity. Implemented the algorithms in a lithography tool and benchmarked against discrete transforms. Investigated the sparsity of the representation of the polygons in Haar basis and its application to the pattern analysis of IC layouts. Outcome resulted in scientific articles, highly optimized software and patents filing.

NEC Corporation, System IP Core Laboratory

March 2007 - January 2008

Research Intern — Implementation in Matlab of a 3GPP compliant simulator to evaluate the performance of different interference mitigation algorithms. Implementation and performance evaluation of QRD-RLS interference mitigation for Wideband CDMA on a CORDIC-based reconfigurable systolic array for software-defined radio (SDR) applications. The result of this work was presented at a domestic SDR conference in Nagano, Japan.


Ph.D. in Signal Processing

EPFL, Lausanne, Switzerland, 2017
Thesis: Rake, Peel, Sketch - The Signal Processing Pipeline Revisited pdf

M.Sc. in Communications Systems

EPFL, Lausanne, Switzerland, 2009
Thesis: Algorithms for the Computation of Continuous Transforms of Rectilinear Polygons pdf

B.Sc. in Communications Systems

EPFL, Lausanne, Switzerland, 2006

Erasmus exchange

Royal Institute of Technology, Stockholm, Sweden, 2006



  • French (Native)
  • English (Fluent)
  • Japanese (Fluent)
  • German (Conversational)
  • Swedish (Basic)


    Signal processing, Multi-channel audio processing Blind source separation Optimization, Algorithms, Fourier, Embedded systems,


    Python, C, C++, MATLAB, Latex, Eagle CAD, git

Operating Systems

    Unix, Mac OS X, Windows