%0 Journal Article
%T Unsupervised Segmentation Methods of TV Contents
%A Elie El-Khoury
%A Christine S¨¦nac
%A Philippe Joly
%J International Journal of Digital Multimedia Broadcasting
%D 2010
%I Hindawi Publishing Corporation
%R 10.1155/2010/539796
%X We present a generic algorithm to address various temporal segmentation topics of audiovisual contents such as speaker diarization, shot, or program segmentation. Based on a GLR approach, involving the ¦¤BIC criterion, this algorithm requires the value of only a few parameters to produce segmentation results at a desired scale and on most typical low-level features used in the field of content-based indexing. Results obtained on various corpora are of the same quality level than the ones obtained by other dedicated and state-of-the-art methods. 1. Introduction Nowadays, due to an explosive growth of digital video content (both online and offline and available by means of public or private databases and TV broadcasts), there is an increasing of accessibility for these data. Actually, the wealth of information raises the problem of an adapted access to video content which includes heterogeneous information that can be interpreted at different granularity levels, thus leading to many profiles of requests. Under these conditions, automatic indexing of the structure, which provides direct access to the various components of the multimedia document, becomes a fundamental issue. For this purpose, a temporal segmentation of audiovisual is required as a preprocessing operation. Results of this segmentation may be directly used for delinearization purposes such as providing a direct access to the content itself. They can also feed other analysis algorithms aiming at producing synoptical views of the content or exploiting temporal redundancy properties inside homogeneous segments to speed up the processing time. Basically, temporal segmentation tools work on a low-level feature (or a small set of low-level features) extracted from the content along the time. Commonly, these low-level features express meaningful properties that can be observed or processed directly from the signal, such as spectrum/cepstrum features for an audio signal or color histograms for an image. They are expressed numerically and represented through vectors whose dimensions depend on the number of those features. Two kinds of segmentation strategies can then be applied. Some algorithms try to gather set of successive values which are supposed to belong to a same homogeneous segment. Some others are focusing on transitions detection between segments. Such algorithms have been developed independently one with the others for different temporal segmentation problems. Among the most addressed ones, we find the ˇ°audio turnˇ± segmentation. An ˇ°audio turnˇ± denotes a homogeneous audio segment related
%U http://www.hindawi.com/journals/ijdmb/2010/539796/