agenda

Signal Processing Seminar

Bastiaan Kleijn

Bastiaan is going to present his recent research.

More ...

Signal Processing Seminar

Matthew Morency

Matthew will present his recent research findings.

More ...

Signal Processing Seminar

Rob Remis

More ...

Signal Processing Seminar

Jamal Amini

Jamal is going to present his recent research.

More ...

Signal Processing Seminar

Millad Sardarabadi

Millad is going to present his recent research.

More ...

Signal Processing Seminar

3D direction of arrival estimation of multiple audio sources with spherical microphone arrays

Despoina Pavlidi
University of Crete, Department of Computer Science, Heraklion, Crete, Greece

Abstract: Direction of arrival estimation plays a central role in numerous signal-processing applications, such as smart home automation, surveillance systems, etc. Until recently the research community was mainly interested in single-dimensional direction of arrival (DOA) estimation by deploying linear or planar microphone arrays. Nowadays the focus has turned also towards spherical microphone arrays, which enable the more accurate capturing of the acoustic wavefield, hence enabling two-dimensional DOA estimation, i.e., the azimuth and elevation of an active audio source. In this talk we will present our proposed methodologies for DOA estimation in the 3D space. Our first proposed method relies on energetic analysis. We estimate the sound intensity vector on selected time-frequency elements of the spectrum and post-process the estimates utilizing 2D histogram representations. We enhance our approach by applying beamforming around local intensity vector directions. We call our hybrid approach spatially constrained beamforming (SCB). Our second proposed method improves the performance of two grid-based approaches, namely the steered response power (SRP) and the multiple signal classification (MUSIC) algorithm, both formulated in the spherical harmonic domain. We propose to derive local DOA estimates from the power map for SRP and the pseudospectrum for MUSIC. From these local DOA estimates we form a 2D histogram that we process to derive the final multiple sources directions.


Signal Processing Seminar

Shahrzad Naghibzadeh

Shahrzad is going to present her recent research.

More ...

Signal Processing Seminar

Pim van der Meulen

Pim is going to present his recent research.

More ...

Signal Processing Seminar

Image domain gridding for radio astronomy

Bas van der Tol
ASTRON

Fast implementations of a "non-uniform FFT" operation

More ...

Signal Processing Seminar

Christos Tzagkarakis

Christos is going to present his recent research.

More ...

Signal Processing Seminar

Bahareh Abdikivanani

Bahareh is going to present her recent research.

More ...

Signal Processing Seminar

Jie Zhang

Jie is going to present his recent research.

More ...

Signal Processing Seminar

Thomas Sherson

Thomas is going to present his recent research.

More ...