SYSTEM AND A METHOD FOR DETERMINING A POSITION OF A SOUND SOURCE

摘要

In accordance with one aspect of the invention, the sound source position determining system comprises a detector (101) for detecting sound data, and a computing unit (103) for computing MUSIC spectrum for each direction and time. The system includes a state transition model that describes state and transition of the state according to existence or absence of sound sources in each direction, and a model parameter estimating unit (105) that determines an observation model describing MUSIC spectrum observed in a state where one or more sound sources exist and in a state where no sound sources exist and estimates posterior distribution of model parameters of the observation model and the state transition model based on temporal data of MUSIC spectrum. The system further comprises a unit (107) for determining positions of one or more sound sources by sampling particles of posterior probability of existence of a sound source for each direction and time based on the estimated posterior distribution of model parameters.