Abstract
The current technological advancement has created the need to produce machines more powerful, easy to use and to meet the needs of users. To achieve this goal, multimodal systems have been developed to combine multiple modalities depending on the task, preferences and communicative intentions of the users.In this paper, we present a new approach to overcome uncertain or ambiguous knowledge during the fission process in multimodal system. This approach is context-based method using Bayesian network. We also present a modular and distributed architecture, which is very useful in multimodal systems.