| Recent years,with the rapid development of wide band networks digital image audio and video compression,great capacity of storage,multimedia database has been possible,facing the immensity of multimedia information,people are eager to acquire information needed rapidly and efficiently. Corresponding to the specialty of multimedia data,its expressing and searching have been important problems in the field of multimedia database.In this paper,we first discussed some element concepts of multimedia database. Then we focused on content-based retrieval,feature extraction and description of multimedia data,and a developing example of multimedia database system. It used the technologies referred,analyzed the probable problems,then offered some methods and relative techniques to solve them. In the end,some future trends were proposed. |
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