Patent Document ID: 9445199
Application ID: 14648208
Patent Flag: 1

Claim One:
1. A method for determining dominant sound source directions in a Higher Order Ambisonics representation denoted HOA of a sound field, said method comprising: from a current time frame of HOA coefficients, estimating a directional power distribution with respect to dominant sound sources; from said directional power distribution and from an a-priori probability function for dominant sound source directions, computing an a-posteriori probability function for said dominant sound source directions; depending on said a-posteriori probability function and on dominant sound source directions for the previous time frame of said HOA coefficients, searching and assigning dominant sound source directions for said current time frame of said HOA coefficients, wherein said a-priori probability function is computed from a set of estimated sound source movement angles and from said dominant sound source directions for the previous time frame of said HOA coefficients, and wherein said set of estimated sound source movement angles is computed from said dominant sound source directions for the previous time frame of said HOA coefficients and from dominant sound source directions for the penultimate time frame of said HOA coefficients.