Patent ID: 7856106

Claim:
A system for determining reproduction signals of an acoustic field, comprising: a plurality of elemental sensors for measuring the acoustic field and for delivering measurements signals, each elemental sensor having a three-dimensional position, a processing device for processing, according to the three-dimensional positions of the elemental sensors, the measurement signals in order to deliver a plurality of reproduction signals forming a representation of the acoustic field, wherein each reproduction signal is associated with a reproduction direction with respect to a given point in space, wherein the reproduction signals make reproduction elements reproduce the acoustic field upon each reproduction signal being delivered to a respective reproduction element orientated according to the reproduction direction associated with the reproduction signal, wherein the elemental sensors are distributed in space at respective positions with respect to a center of the elemental sensors, according to a substantially non-regular distribution, in which, for the following three-dimensional coordinate systems: Cartesian, cylindrical or spherical, for at least one of the coordinates of the coordinate system, the values of the coordinates of the positions of all of the elemental sensors are distributed on distinct values and at a non-constant pitch, wherein the processing device comprise a single filtering matrix T, receiving as an input the measurement signals and delivering as an output the reproduction signals, and wherein T=DE, where: E is an encoding matrix representative of the spatial configuration of an acquisition means, and D is a decoding matrix representative of the predetermined general reproduction directions.