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- Baravdish, George, et al.
(författare)
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PDE-SVD Based Audio Denoising
- 2012
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Ingår i: Proceedings of the 5th International Symposium on Communications Control and Signal Processing (ISCCSP), 2012. - Piscataway, NJ, USA : IEEE. - 9781467302746 ; , s. 1-6
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Konferensbidrag (refereegranskat)abstract
- In this paper we present a new method for denoising audio signals. The method is based on the Singular Value Decomposition (SVD) of the frame matrix representing the signal inthe Overlap Add decomposition. Denoising is performed by modifying both the singular values, using a tapering model, and the singular vectors of the representation, using a nonlinear PDE method. The performance of the method is evaluated and compared with denoising obtained by filtering.
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- Bock, Alexander, 1985-, et al.
(författare)
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Guiding Deep Brain Stimulation Interventions by Fusing Multimodal Uncertainty Regions
- 2013
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Deep Brain Stimulation (DBS) is a surgical intervention that is known to reduce or eliminate the symptoms of common movement disorders, such as Parkinson.s disease, dystonia, or tremor. During the intervention the surgeon places electrodes inside of the patient.s brain to stimulate speci.c regions. Since these regions span only a couple of millimeters, and electrode misplacement has severe consequences, reliable and accurate navigation is of great importance. Usually the surgeon relies on fused CT and MRI data sets, as well as direct feedback from the patient. More recently Microelectrode Recordings (MER), which support navigation by measuring the electric .eld of the patient.s brain, are also used. We propose a visualization system that fuses the different modalities: imaging data, MER and patient checks, as well as the related uncertainties, in an intuitive way to present placement-related information in a consistent view with the goal of supporting the surgeon in the .nal placement of the stimulating electrode. We will describe the design considerations for our system, the technical realization, present the outcome of the proposed system, and provide an evaluation.
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- Eckerholm, Fredrik, et al.
(författare)
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The PluckSynth touch string
- 2008
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Ingår i: Proc. of Digital Audio Effects Conf. (DAFx `08). - Helsinki, Finland : DAFx. ; , s. 213-220
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Konferensbidrag (refereegranskat)abstract
- In this paper the problem of the synthesis of plucked strings by means of physically inspired models is reconsidered in the context of the player-s interaction with the virtual instrument. While solutions for the synthesis of guitar tones have been proposed, which are excellent from the acoustic point of view, the problem of the control of the physical parameters directly by the player has not received sufficient attention. In this paper we revive a simple model previously presented by Cuzzucoli and Lombardo for the player-s touch. We show that the model is affected by an inconsistency that can be removed by introducing the finger/pick perturbation in a balanced form on the digital waveguide. The results, together with a more comprehensive model of the guitar have been implemented in a VST plugin, which is the starting point for further research.
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- Evangelista, Gianpaolo
(författare)
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Data Analysis Methods for Non-Gaussian, Nonstationary and Nonlinear Features and their Application to VIRGO
- 2003
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Ingår i: Classical and Quantum Gravity. - : IOP Publishing. - 0264-9381 .- 1361-6382. ; 20:17, s. S915-S924
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Tidskriftsartikel (refereegranskat)abstract
- The commissioning of the VIRGO central interferometer occasioned the implementation and tests of various algorithms for the characterization of the non-Gaussianity, non-stationarity and non-linearity of the dark fringe data. This library of prototypes will serve as groundwork for the near commissioning of VIRGO (full scale). We make a summary of the activities on that subject including the description of the selected algorithms and some results obtained with the data of the engineering runs.
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- Evangelista, Gianpaolo
(författare)
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Dyadic Warped Wavelets
- 2001
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Ingår i: Advances in Imaging and Electron Physics. - 1076-5670. ; 117, s. 73-171
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Tidskriftsartikel (refereegranskat)
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