Method and apparatus for determining directions of uncorrelated sound sources in a higher order ambisonics representation of a sound field

摘要

Higher Order Ambisonics (HOA) represents three-dimensional sound. HOA provides high spatial resolution and facilitates analysing of the sound field with respect to dominant sound sources. The invention aims to identify independent dominant sound sources constituting the sound field, and to track their temporal trajectories. Known applications are searching for all potential candidates for dominant sound source directions by looking at the directional power distribution of the original HOA representation, whereas in the invention all components which are correlated with the signals of previously found sound sources are removed. By such operation the problem of erroneously detecting many instead of only one correct sound source can be avoided in case its contributions to the sound field are highly directionally dispersed.