Patent ID: 9099096
Filing Date: 2015-08-04
Classification: G10L

Abstract:
1. A method of processing signals with a signal processing device, comprising: converting a plurality of time domain mixed signals into the time-frequency domain, wherein the time domain mixed signals include signals that have been collected by an array of sensors or transducers, each time domain mixed signal including a mixture of original source signals, thereby generating time-frequency domain mixed signals corresponding to the time domain mixed signals; and performing independent component analysis on the time-frequency domain mixed signals to generate at least one estimated source signal corresponding to at least one of the original source signals, and outputting the at least one estimated source signal, wherein the independent component analysis is performed in conjunction with a moving constraint that models source motion from a direct to reverberant ratio of a source signal and a direction of the source signal, said direct to reverberant ratio obtained from de-mixing filters used in the independent component analysis, and the independent component analysis uses a multivariate probability density function to preserve the alignment of frequency bins in the at least one estimated source signal.