Patent ID: 9558762
Date: 2017-01-31
CPC Classifications: G06K,G10L

Claim:
1. A system for distinguishing between a plurality of acoustic sources generating sound in the form of unconstrained acoustic signals captured therefrom, comprising: a transformation unit applying a spectrographic transformation upon each time-captured segment of unconstrained acoustic signal generated by one of a plurality of distinct acoustic sources, said transformation unit generating a spectral vector for each said segment; a sparse decomposition unit coupled to said transformation unit, said sparse decomposition unit selectively executing in at least a training system mode a simultaneous sparse approximation upon a joint corpus of spectral vectors for a plurality of unconstrained acoustic signal segments from at least a subset of the distinct acoustic sources, at least one of said spectral vectors generated by the spectrographic transformation, said sparse decomposition unit generating at least one sparse decomposition defined in a multi-dimensional space for each said spectral vector in terms of a representative set of decomposition atoms; a discriminant reduction unit coupled to said sparse decomposition unit, said discriminant reduction unit being executable during the training system mode to down-select from said representative set of decomposition atoms an optimal combination of atoms for cooperatively distinguishing acoustic signals emitted by different ones of the distinct acoustic sources; and, a classification unit coupled to said sparse decomposition unit, said classification unit being executable in a classification system mode to: