Drum Event Detection by Noise Subspace Projection and Classification
نویسنده
چکیده
Pre-processing of stereo signals A pair of gains is selected for each channel, in order to maximize an impulsiveness criterion on the envelope of the remixed monophonic signal. The impulsiveness measure I is computed as follows: Firstly, an envelope signal s′(t) is obtained by half-wave rectifying, decimating, low-pass filtering, and differentiating s(t). Then a contrast factor on this envelope is computed. This contrast factor is defined as the ratio between the arithmetic and geometric mean of the envelope signal:
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