Classifying Human Voices by Using Hybrid SFX Time-Series Preprocessing and Ensemble Feature Selection

Table 1

The piecewise segment statistics feature extraction.

Attribute	1	2	3	⋯ 𝑖⋯	20
Gradient	Grad 1	Grad 2	Grad 3	⋯ ⋯	Grad 20
RSS	RSS 1	RSS 2	RSS 3	⋯ ⋯	RSS 20
Resstd	Resstd 1	Rresstd 2	Resstd 3	⋯ ⋯	Resstd 20
Volmean	Volmean 1	Volmean 2	Volmean 3	⋯ ⋯	Volmean 20
Volstd	Volstd 1	Volstd 2	Volstd 3	⋯ ⋯	Volstd 20