Multimedia technologies for structuring and retrieval of TV news

Because of the media digitization, a large amount of information such as sp eech, audio and video data is produced everyday. In order to retrieve data from these databases quickly and precisely, multimedia technologies for str ucturing and retrieving of speech, audio and video data are strongly requir ed. In this paper, we overview the multimedia technologies such as structur ing and retrieval of speech, audio and video data, speaker indexing, audio summarization and cross media retrieval existing today for TV news database . The main purpose of structuring is to produce tables of contents and indi ces from audio and video data automatically. In order to make these technol ogies feasible, first, processing units such as words on audio data and sho ts on video data are extracted. On a second step, they are meaningfully int egrated into topics. Furthermore, the units extracted from different types of media are integrated for higher functions.