摘要 : Because of the media digitization, a large amount of infor- mation such as speech, audio and video data is produced everyday. In order to retrieve data for these databases quickly and precisely, multimedia tech- nologies for struc... 展开 Because of the media digitization, a large amount of infor- mation such as speech, audio and video data is produced everyday. In order to retrieve data for these databases quickly and precisely, multimedia tech- nologies for structuring and retrieving of speech, audio and video data are strongly required. In this paper, we overview the multimedia technologies such as structuring and retrieval of speech, audio an video data, speaker indexing, audio summarization and cross media retrieval existing today for RV news detabase. 收起