Feature selection method based on orthogonal experiments for speech recognition
Wenhu Wu · Journal of Tsinghua University(Science and Technology) · 2003
A new feature selection method was developed for speech recognition using orthogonal experiment design. The purpose was to identify which features cooperate. This method has 4 advantages: 1) The experiment scheme is simple and satisfies the orthogonality condition. 2) The analysis of the experiment results is convenient and the physical meaning of the analysis result is obvious. 3) This method can find feature combinations with better recognition performance using fewer experiments. 4) The experimental results provide useful information for additional experiments. The experimental results show that orthogonal experiment design facilitates feature selection.