Patent ID: 8880413
Filing Date: 2014-11-04
Classification: G10L,H04S

Abstract:
1. A method of processing sound data for a three-dimensional spatialized restitution on two restitution channels for the respective ears of a listener, the sound data being initially in a multi-channel format and then compression-encoded on a reduced number of channels, said multi-channel format consisting in providing more than two channels able to feed respective loud speakers, the method comprising the steps: wherein the method furthermore comprises the steps: for each restitution channel associated with an ear of the listener, determining from said spatialization parameters at least one transfer function of a loud speaker behind the listener's ear and representing a decorrelation between the channels of the multi-channel format respectively associated with the back loud speaker and at least one loudspeaker-in front of the listener's ear, said decorrelation comprising applying to a signal input to the transfer function representing a decorrelation and broken down into frequency subbands a different phase shift in each of the subbands, combined with the addition of an overall delay to the signal, and for each restitution channel, integrating said transfer function representing a decorrelation in said combination of filters associated with this restitution channel.