G - Physics – 06 – F
Patent
G - Physics
06
F
G06F 17/14 (2006.01) H04S 1/00 (2006.01)
Patent
CA 2499658
The invention relates to a method of processing a sound field representation which can be used to provide a representation which has been modified by means of at least spatial processing. The inventive method comprises the following steps: the establishment (8) of an initial representation of the sound field and the establishment (10) of a representation which has been modified by filtering combinations corresponding to the aforementioned processing operation. The invention is characterised in that it also comprises a step (2) which consists in defining the processing operation and which comprises: a step (4) involving the establishment of a set of directivity functions, which is representative of the aforementioned processing and which takes the form of a set of coefficients corresponding to the spherical harmonic decomposition of said functions; and a step (6) in which the above-mentioned filtering combinations are determined from the decomposition so that another step (10) involving the application of the thus defined filtering combinations can be performed.
Ce procédé de traitement d'une représentation d'un champ acoustique permet de délivrer une représentation modifiée par un traitement au moins spatial et comporte :- l'établissement (8) d'une représentation initiale du champ acoustique; et- l'établissement (10) d'une représentation modifiée par des combinaisons de filtrage correspondant audit traitement. Il est caractérisé en ce qu'il comporte en outre une étape (2) de définition dudit traitement, laquelle comprend :- une étape (4) d'établissement d'un ensemble de fonctions de directivité représentatif dudit traitement, sous la forme d'un ensemble de coefficients correspondant à la décomposition de ces fonctions sur une base d'harmoniques sphériques ; et - une étape (6) de détermination desdites combinaisons de filtrage à partir de cette décomposition pour la mise en uvre d'une étape (10) d'application des combinaisons de filtrage ainsi définies.
Bruno Remy
Laborie Arnaud
Montoya Sebastien
Robic
Trinnov Audio
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