Table 6 Confusion matrix for HMM-based system using formant parameter contours (MP), ${\nu }^{\left(\mathit{i}\right)}=\left[m_{F_1}^{\left(i\right)},m_{F_2}^{\left(i\right)},m_{F_3}^{\left(i\right)},m_{A_1}^{\left(i\right)},m_{A_2}^{\left(i\right)},m_{A_3}^{\left(i\right)}\right]$ (overall accuracy 45.0%)

From: On the use of speech parameter contours for emotion recognition