References of "Embrechts, Jean-Jacques"
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See detailObjective study of spatial attributes in the room impulse response's late part and their relevance for auralization
Billon, Alexis ULg; Embrechts, Jean-Jacques ULg

in Proceedings of the Euronoise 2009 Congress (2009, October)

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See detailSize-adaptive spherical receptor acceleration method for acoustical ray tracing
Lesoinne, Stéphane ULg; Embrechts, Jean-Jacques ULg

in Proceedings of the 5th Forum Acusticum "Acoustics '08" (2008, July)

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See detailMathematical modelization of reduced luminance coefficients for dry road surfaces
Debergh, Nathalie; Embrechts, Jean-Jacques ULg

in Lighting Research & Technology (2008), 40

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See detailAcoustique du bâtiment
Embrechts, Jean-Jacques ULg

Learning material (2008)

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See detailAcoustique appliquée: fondements et lutte contre le bruit
Embrechts, Jean-Jacques ULg

Learning material (2008)

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See detailA moving listener in a virtual audio environment with particularly irregular reverberation decay
Embrechts, Jean-Jacques ULg; Lesoinne, Stéphane ULg; Werner, Nicolas

in Proceedings of the 28th Symposium on Information Theory in the Benelux (2007)

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See detailA video-based human-computer interaction system for audio-visual immersion
Dardenne, Renaud; Embrechts, Jean-Jacques ULg; Van Droogenbroeck, Marc ULg et al

in Proceedings of SPS-DARTS (2006, March)

This paper describes the video and audio tools that have been implemented in a real-type system to immerse a user into a virtual scene. The video tools include motion detection, skin detection by ... [more ▼]

This paper describes the video and audio tools that have been implemented in a real-type system to immerse a user into a virtual scene. The video tools include motion detection, skin detection by thresholding, shadow detection and extraction, and finally the user’s head and hands detection. Once this is done, the user (who is surrounded by a matrix of loudspeakers) is able to move a sound source in the horizontal plane around him. Moreover, the sound is auralized by convolution with (directional) room impulse responses, which have been pre-computed by a ray tracing method. The different sound contributions are distributed to the individual loudspeakers by applying the VBAP technique. [less ▲]

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See detailResearch Unit in Signal and Image Exploitation (INTELSIG)
Verly, Jacques ULg; Piater, Justus ULg; Van Droogenbroeck, Marc ULg et al

Scientific conference (2006)

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See detailA tutorial on scattering and diffusion coefficients for room acoustic surfaces
Cox, T. J.; Dalenback, B.-I.; D'Antonio, P. et al

in Acta Acustica United with Acustica (2006), 92(1, JAN-FEB), 1-15

There is a need to be able to quantify how sound is reflected from a surface, in terms of how it is spatially dispersed. In recent years, diffusion and scattering coefficients have been developed to ... [more ▼]

There is a need to be able to quantify how sound is reflected from a surface, in terms of how it is spatially dispersed. In recent years, diffusion and scattering coefficients have been developed to enable room acoustic prediction models to be more accurate, and designers to evaluate the worth of diffusing surfaces. Two coefficients have been, or are about to be, enshrined in standards. With two coefficients being standardised, there is great potential for confusion. This paper is intended to bring together authors from different areas to explain where the coefficients should and should not be applied. In addition, this tutorial paper will revisit the rationale behind the coefficients and contrast the coefficient definitions and performance. [less ▲]

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See detail3D real-time auralization with separate rendering of direct sound, reflections and directional late reverberation
Lesoinne, Stéphane ULg; Werner, Nicolas; Embrechts, Jean-Jacques ULg

in Proceedings of the 2006 international Conference on Auditory Display (2006)

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See detailIntroduction aux techniques audio et vidéo
Embrechts, Jean-Jacques ULg

Learning material (2006)

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See detailCalculation of the random-incidence scattering coefficients of a sine-shaped surface
Embrechts, Jean-Jacques ULg; De Geetere, L.; Vermeir, G. et al

in Acta Acustica United with Acustica (2006), 92(4, JUL-AUG), 593-603

Random-incidence scattering coefficients obtained by measurement in reverberation chambers (ISO 17497-1) for a particular sine-shaped surface are compared with theoretical results. Holford-Urusovskii's ... [more ▼]

Random-incidence scattering coefficients obtained by measurement in reverberation chambers (ISO 17497-1) for a particular sine-shaped surface are compared with theoretical results. Holford-Urusovskii's method and a hybrid plane wave decomposition - FEM method are applied to an infinite sine-shaped surface having the same profile, while the 3D BEM gives numerical results for the finite-size surface. Perfect rigidity (Neumann boundary condition) is assumed in all computations. The validity of the computations is compared and discussed with regard to the approximations involved. Finally, the measured and calculated values of the scattering coefficients are compared. A good correspondence is found, in particular concerning the overall dependence on frequency. Small deviations have however been observed, at low as well as at high frequencies. They will be explained by uncertainties in the measurements and discretisation errors in the calculations. [less ▲]

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See detailThe CINEMA Project: A Video-Based Human-Computer Interaction System for Audio-Visual Immersion
Dardenne, Renaud; Embrechts, Jean-Jacques ULg; Van Droogenbroeck, Marc ULg et al

in ERCIM News (2005), 62

Numerous studies are currently focusing on the modelling of humans and their behavior in 3D environments. The CINEMA project has similar goals but differentiates itself by aiming at enhanced interactions ... [more ▼]

Numerous studies are currently focusing on the modelling of humans and their behavior in 3D environments. The CINEMA project has similar goals but differentiates itself by aiming at enhanced interactions, the creation of mixed reality, and the creation of interactive and reactive acoustical environments. Part of the project consists in gesture recognition of a user, who is given the real-time control of auralization and audio spatialization processes. [less ▲]

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