[ACM Press the Joint Workshop of the 4th Workshop - Seoul, Republic of Korea (2018.10.26-2018.10.26)] Proceedings of the Joint Workshop of the 4th Workshop on Affective Social Multimedia Computing and first Multi-Modal Affective Computing of Large-Scale Multimedia Data - ASMMC-MMAC'18 - A Kullback-Leibler Divergence Based Recurrent Mixture Density Network for Acoustic Modeling in Emotional Statistical Parametric Speech Synthesis