RT - Journal Article T1 - Connection Optimization of a Neural Emotion Classifier Using Hybrid Gravitational Search Algorithms JF - ITRC YR - 2015 JO - ITRC VO - 7 IS - 1 UR - http://ijict.itrc.ac.ir/article-1-108-en.html SP - 41 EP - 51 K1 - emotion recognition K1 - speech processing K1 - neural network K1 - connection optimization K1 - structure optimization K1 - gravitational search algorithm AB - Artificial neural network is an efficient model in pattern recognition applications, but its performance is heavily dependent on using suitable structure and connection weights. This paper presents a hybrid heuristic method for obtaining the optimal weight set and architecture of a feedforward neural emotion classifier based on Gravitational Search Algorithm (GSA) and its binary version (BGSA), respectively. By considering various features of speech signal and concatenating them to a principal feature vector, which includes frame-based Mel frequency cepstral coefficients and energy, a rich medium-size feature set is constructed. The performance of the proposed hybrid GSA-BGSA-neural model is compared with the hybrid of Particle Swarm Optimization (PSO) algorithm and its binary version (BPSO) used for such optimizations. In addition, other models such as GSA-neural hybrid and PSO-neural hybrid are also included in the performance comparisons. Experimental results show that the GSA-optimized models can obtain better results using a lighter network structure. LA eng UL http://ijict.itrc.ac.ir/article-1-108-en.html M3 ER -