Table 3.

Comparison of F1 scores between clip-level and frame-level classification results based on clip length.

Decision Interval	Decision Unit	F1 Score
		T01	T02	T03
5 s	Frame level	0.950	0.900	0.918
	Clip level	1.000	0.971	1.000
4 s	Frame level	0.953	0.893	0.917
	Clip level	1.000	0.952	0.990
3 s	Frame level	0.943	0.896	0.919
	Clip level	1.000	0.953	0.977
2 s	Frame level	0.939	0.880	0.899
	Clip level	0.993	0.937	0.980
1 s	Frame level	0.916	0.853	0.856
	Clip level	0.964	0.902	0.935