Fig. 1. Audio event detection system The system consists of two phases - offline training (or event modelling) and online testing (event detection) as shown in figure 1. We describe its various components as follows. Fig. 2. The 50 ms sample audio frames for different events Fig. 3. Log scale filter distribution in Log and Linear scale Fig. 4. A hierarchical approach for event detection Table 5. Classification accuracies (%) for all four events using single-level approach
