http://popups.lib.uliege.be/1373-5411/index.php?id=663 Index terms fr 0 http://popups.lib.uliege.be/1373-5411/index.php?id=1575 This paper proposes some clues for a formal framework for representing and manipulating knowledge about musical perception. Our purpose is to set up a perception model that will enable us to simulate the behaviour of an agent in listening situation. It will lead to produce an "Intelligent" representation of a piece of music. We apply ourselves here to characterize intervention of Time in the musical perception in initiating a formal comparison between several models. Reasoning within a classical time logic supposes to take a priori time as a cause to describe the nature of knowledge. Our approach consists in supposing that the structure of knowledge a posteriori informs time; thus the nature of time is a consequence of the interpretation of events. This means we have to distinguish Universal Time from a bunch of musical times. We focus on some auditives illusions for their capacity to show particular properties of Musical Time. Mon, 15 Jul 2024 15:06:54 +0200 Mon, 07 Oct 2024 15:16:35 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=1575 http://popups.lib.uliege.be/1373-5411/index.php?id=370 Working on the pre-attentive stage of perception by the human visual system (HVS), we propose both a modelling of chromatic perception (l) by means of 4 attactors associated to a mathematical symbolism induced by branching theory, and some structures for the shapes -or coloured shapes- processing. This research involved by the computer graphics and neurophysiology results about recognition of optical signal processing circuits have necessitated to reinvest the visual chain : object (emitter or re-emitter), light information vehicle, the colour receiver, the processors of the SVH. The local physico-mathematical formula set very developed about propagation, has brought solutions for monochromatic waves and for obstacle with smooth edge reveal neither various curvatures (2) nor a fortiori the texture of reemitting object U(3). A resort to a formula-set about interaction matter radiation, extended to a systemic approach,give an algorithmic stage to take account the spatial character (2) and (3). Taking account on one side this scalar conjecture about visual information, and on another side a retinal functional specialisation, we propose a modelling of C occluding edge detection of 3D-object. C except in isolated points by envelop method. The elaboration of a valuation table of morphemes associating the mathematical characteristics of curves with their pregnance treat the more cognitive stage of processing associating edge and colour. Some pictures illustrate the abilities of curves family to suggest 3D-shape. The chromaticity of delimited areas strengthen, or rather create, psycho-affective suggests associated to logos. Wed, 26 Jun 2024 12:17:09 +0200 Fri, 28 Jun 2024 16:58:54 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=370