Abstract: Multimedia semantic research is one of the most important issues in multimedia analyzing and multimedia information service field. This issue originated from multimedia data's capture becomes an important bottleneck in multi-media applications. Multimedia semantic model is a summary and abstraction of multimedia processing, and focuses on all semantic problems existing in the lifecycle of multimedia data. The theme introduced the research developments of multimedia semantic models in content description, semantic representation and retrieval models.

Key words: Multimedia semantic model, Content description, Semantic representation, Retrieval model