[Elsnet-list] Internship in Novel approaches to ad-hoc microphone array processing

Phil Garner Phil.Garner at idiap.ch
Wed Apr 4 17:10:16 CEST 2012

Idiap Research Institute seeks an intern beginning June 2012, for a fixed
period of six months, to work on novel approaches to ad-hoc microphone array
processing. The internship is funded by the Marie-Curie training network SCALE.

The concept of microphone arrays is well established, with multiple microphones
arranged in typically regular patterns, able to dynamically focus on different
areas of a scene. Given a microphone topology, delay-and-sum and
super-directive (for example) beam-forming algorithms follow easily. More
recently, the concept of ad-hoc arrays has attracted attention. An ad-hoc array
is one where the microphones are not necessarily in a regular pattern; they may
be clustered or random, and may even be asynchronous. Such patterns arise from
more physical or aesthetic limitations.

One recent research focus in signal processing has been to take advantage of
methods based on sparse assumptions. Such methods seek a typically high
dimensional signal representation where signals of interest occupy a small
subspace. The methods are powerful in their ability to solve underdetermined
problems. In the SCALE project at Idiap, methods based on sparsity have been
used successfully to solve microphone array problems.

The successful candidate will begin by applying methods developed under SCALE
to microphone array problems on real databases. The focus will be to
characterise and evaluate new and promising techniques. Depending upon the
candidate, the work could then progress either experimentally to compare and
contrast methods and find optimal microphone topologies, or theoretically to
refine the existing algorithms.

During the three years directly prior to recruitment the candidate must have
resided less than 12 months in Switzerland.

Applications must be received by the end of April 2012.



Phil Garner

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