Patent ID: 6691087
Filing Date: 2004-02-10
Classification: G10L

Abstract:
A signal processing method for detecting a presence of a desired signal component from an input signal having more than one signal component, said method comprising the steps of:a) applying a windowing function to the input signal to generate a plurality of frames; b) selecting at least one feature for processing said plurality of frames; and c) detecting the presence of the desired signal component in said frames in accordance with said selected feature by categorizing said frames using a probabilistic description, wherein said detecting step (c) employs an Expectation-Maximization method having a probabilistic description of p(y)=m1N(y ;&mgr;1,&Sgr;1)+m2N(y ;&mgr;2,&Sgr;2), wherein said probabilistic description is optimized in a single pass.