Specially appointed assistant professor (full-time)
Current research interests:
Contact: viktor [at] ist [dot] osaka-u [dot] ac [dot] jp
|Sonoloc: Scalable positioning of commodity mobile devices [PDF] [Slides] (See below for source code)||Viktor Erdélyi, Trung-Kien Le, Bobby Bhattacharjee, Peter Druschel, Nobutaka Ono||MobiSys 2018|
|EnCore: Private, Context-based Communication for Mobile Social Apps [PDF] [Slides]||Paarijaat Aditya, Viktor Erdélyi, Matthew Lentz, Elaine Shi, Peter Druschel, Bobby Bhattacharjee||MobiSys 2014|
|SDDR: Light-Weight, Secure Mobile Encounters [PDF] [Slides]||Matthew Lentz, Viktor Erdélyi, Paarijaat Aditya, Elaine Shi, Peter Druschel, Bobby Bhattacharjee||USENIX Security 2014|
This project is about scalable positioning of commodity mobile devices using audio signals. I developed a system that can compute a 2D relative position map of nearby mobile devices (such as smartphones). To compute the position map, the system uses a small number of acoustic signal transmissions emitted by a subset of the participating devices.
A research internship under the supervision of Assoc. Prof. Nobutaka Ono. I implemented Nobutaka Ono's Harmonic-Percussive Sound Separation (HPSS) effect as an extension for Audacity (a popular open-source sound processing tool). The purpose of HPSS is to separate a music track into harmonic and percussive components (both of which are considered useful signals). I also implemented an HPSS-based vocal separation effect as a new effect for Audacity. The purpose of this effect is to separate vocal components from non-vocal components in a music track.
EnCore is a privacy-preserving platform for mobile social applications. It leverages rich contextual data available on modern mobile devices to provide social services in a privacy-preserving way.