Table 4 The list of operators used in the feature synthesis process for features f a and f b
From: An evolutionary feature synthesis approach for content-based audio retrieval
θ n | Formula | θ n | Formula |
|---|---|---|---|
0 | –f α | 9 | f α * f b |
1 | –f b | 10 | 10 (f α * f b ) |
2 | max (f α , f b ) | 11 | f α /f b |
3 | min (f α , f b ) | 12 | sin (100π(f α + f b )) |
4 | f α * f α | 13 | cos(100π(f α + f b )) |
5 | f b * f b | 14 | tan(100π(f α * f b )) |
6 | f α + f b | 15 | tan(100π(f α + f b )) |
7 | 10 (f α + f b ) | 16 | 0.5 * exp( − (f α − f b ) * (f α − f b )) |
8 | f α – f b | 17 | 0.5 * exp( + (f α + f b ) * (f α + f b )) |