An audio classification system classifies sounds in an audio stream as belonging to one of a relatively small number of classes. The audio classification system includes a signal analysis component [ 301] and a decoder [ 302] . The decoder [ 302] includes a number of models [ 310 - 316 ] for performing the audio classifications. In one implementation, the possible classifications include: vowels, fricatives, narrowband, wideband, coughing, gender, and silence. The classified audio may be used to enhance speech recognition of the audio stream.
Systems and methods for classifying audio into broad phoneme classes