Patent ID: 9622008
Date: 2017-04-11
CPC Classifications: G10L,H04S

Claim:
1. A method for determining directions of uncorrelated sound sources in a Higher Order Ambisonics (HOA) representation of a sound field, comprising: in a current time frame of HOA coefficients, searching preliminary direction estimates of dominant sound sources; and determining HOA sound field components based on corresponding dominant sound sources, wherein a current direction estimate is determined based on a residual HOA representation which represents an original HOA representation from which all components correlated with signals of previously found sound sources have been removed, wherein the current direction estimate is selected out of a set of predefined test directions, based on a power of a related general plane wave of the residual HOA representation, impinging from a direction on a listener position, relative to respective power of all other test directions, and wherein the current direction estimate for the current time frame of HOA coefficients is assigned to at least a dominant sound source of a previous time frame of HOA coefficients and is smoothed with respect to a time trajectory.