Patent ID: 9232311
Filing Date: 2016-01-05
CPC Classification: H04R

Claim Text:
1. A method for processing a digital audio signal intended to be reproduced by an equipment including an electrodynamic loudspeaker whose overall response as a function of the electrical signal applied to its terminals is defined by a set of electrical, mechanical and acoustical parameters, the method comprising: a) the determination of an observation vector comprising only measurements of electrical parameters, with: b) the determination of a state vector (X) by application of the voltage and current measurements to a predictive filter estimator incorporating a representation of a dynamic model of the loudspeaker,  this predictive filter being an extended Kalman filter adapted to: c) the application to the audio signal of a processing that is a function of the state vector (X), characterized in that the components of the state vector comprise: d) reproducing the audio signal by the equipment.