hi i saw ur message with respect to that Facial Animation Parameters (FAPs), supported by the MPEG-4 standard, as features describing facial expressions. In particular, the FAPs controlling the movement of the outer-lips and eyebrows are used as visual features for classification. Experiments were performed under several different scenarios utilizing outer-lip and eyebrow FAPs individually and jointly. A new approach is proposed for introducing facial expression and FAP group dependent stream weights. The weights were chosen based on the facial expression recognition results obtained when FAP group streams are utilized individually. In the first step, the Low Level Facial Animation Parameters are extracted. The second step analyses these FAPs by means of Neural Networks to estimate the expressions. The proposed facial expression recognition system achieves relative reduction of the expression recognition error of 44%, compared to the single-stream system.