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Figure 7: Example Viterbi decoding pass for audio containing coughs. In this case the background model had 6 states with 60 mixtures per state while the cough model had 5 states with 60 mixtures per state with a left-to-right topology. The horizontal axis represents time (at the frame rate) while the vertical axis is an integer of the state index. Gray marks indicate states associated with the silence and background models. Black marks indicate states associated with the cough model.